advertisement
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HAWK 2 Family:
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(Wide bus)
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ST12400W/WD/WC
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Product Manual, Volume 1
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HAWK 2 Family:
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(Wide bus)
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ST12400W/WD/WC
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Product Manual, Volume 1
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1995 Seagate Technology, Inc. All rights reserved
Publication Number: 77767457, Rev. C
March 1995
Seagate
, Seagate Technology
and the Seagate logo are registered trademarks of Seagate Technology,
Inc. Hawk™, SeaFAX
, SeaFone
, SeaTDD
and SeaBOARD
are trademarks of Seagate Technology,
Inc. Other product names are registered trademarks or trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission of Seagate Technology, Inc.
Notice.
Product Manual 77767457 is Volume 1 of a two Volume document with the SCSI interface information in the Volume 2 SCSI Interface Product Manual, P/N 77738479.
If the SCSI Interface information is needed the Volume 2 Interface Manual should be ordered, P/N 77738479.
vi Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
_____________________________________________________________________________________
Table of contents
SCSI drive Seek, Read and Write performance characteristics (Visible to User) ............ 8
Format drive command execution time .............................................................. 9
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A vii
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Table of contents
viii Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B
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Table of contents
Synchronous data transfer periods supported .................................................... 50
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 1
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1.0
Scope
This specification describes the Seagate Technology, Inc. Hawk 2 family Model ST12400 Wide SCSI bus
Disc Drive. This high capacity, high performance member of the Seagate 3.5 inch rigid disc family has a new
HDA (Head/Disc Assembly) design having improvements over previous 3.5-inch Seagate models. It has an embedded SCSI controller. Performance information is given in Section 5. The Model Hawk 2 Family (Wide bus) drive interface is defined for functional compatibility to a subset of the Seagate SCSI-2/SCSI-3 Interface
Specification 77738479, and the ANSI SCSI-2/SCSI-3 standards. The Model Hawk 2 Family (Wide bus) drives are classified as “Intelligent” peripherals. The Hawk 2 Family (Wide bus) provides Level 2 conformance (highest level) with the ANSI SCSI-1 standard. Details of the Hawk 2 Family (Wide bus) drive SCSI implementation are provided in Section 11 of this specification, (Volume 1) and in the SCSI-2/SCSI-3 Interface Product Manual P/N 77738479 (Vol. 2; Ver. 2).
The Hawk 2 wide family of drives consists of the ST12400W, ST12400WD and ST12400WC drives.
From this point on in this Product Manual the reference to Hawk 2 Family (Wide bus) is referred to as “the drive” (unless reference to individual models are necessary).
The drive printed circuit board is referred to as a PCB.
SEAGATE
*
*I/O connector shown is on models ST12400W/WD drives.
Model ST12400WC has a single 80 pin connector.
Figure 1-1. Hawk 2 family (Wide SCSI bus) drive
2 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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2.0
Applicable standards and reference documentation
The drive has been developed as a system peripheral to the highest standards of design and construction.
The drive depends upon its host equipment to provide adequate power and environment in order to achieve optimum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, mechanical mounting and temperature regulation.
2.1
Standards
The ST12400 Wide SCSI bus drive family complies with Seagate standards as noted in the appropriate sections of this specification and the Seagate SCSI-2/SCSI-3 Interface Specification, P/N 77738479 (Vol. 2,
Version 2).
The ST12400 wide family is a UL Recognized component per UL 1950 and a CSA Certified component per
CAN/CSA-C22.2 No. 950-M89. It also meets the requirements of DIN VDE 0805/05.90 and EN60950: 1988
(IEC 950).
The ST12400 wide family drives, as delivered, are designed for system integration and installation into a suitable enclosure prior to use. As such the ST12400 wide family drives are supplied as a sub-assembly and are not subject to Subpart J of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications. However, the units have been tested using proper shielding and grounding and found to be compliant with Class A limits of the FCC Rules and the Regulations of The Canadian Department of Communications.
The physical design characteristics of the ST12400 wide family serve to minimize radiation when installed in an enclosure that provides reasonable shielding. As such, the ST12400 wide is capable of meeting the Class
B limits of the FCC Rules and Regulations of the Canadian Department of Communication. However, it is the users responsibility to assure that the ST12400 wide meets the appropriate EMI requirements in their system. Shielded I/O cables may be required if the enclosure does not provide adequate shielding. If the I/O cables are external to the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host controller.
Caution.
To avoid potential service problems, observe the following precautions:
2.2.
The Manufacturers installed labels must not be removed from the drive or covered with additional labels, as they contain information required when servicing the product.
Applicable reference documents
Installation Guide
Product Manual - SCSI-2/SCSI-3 Interface
Seagate P/N 77767465
Seagate P/N 77738479
ANSI Small Computer System Interface (SCSI): Document Number ANSI3.131-1986 (X3T9/84.40 Rev. 1B)
(X3T9.2/82-2 Rev. 17B), X3T9.2/86-109 Revision 10H (SCSI-2) and X3T9.2/92-184 Rev. 4 (SCSI-3).
Package Test Specification Seagate P/N 30190-001 (under 100 lbs.)
Package Test Specification Seagate P/N 30191-001 (over 100 lbs.)
In case of conflict between this document and any referenced document, this document shall take precedence.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 3
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3.0
General description
The drives are a member of a family of low cost, high performance, highly reliable, random access storage devices designed to meet the needs of the OEM marketplace.
The drive records and recovers data on 3.7 inch (95 mm) fixed discs.
The drive supports the Small Computer System Interface (SCSI-1, SCSI-2 and SCSI-3) as described in the
ANSI SCSI Interface Specifications to the extent described in this product specification (Volume 1). This manual defines the product performance characteristics of the ST12400 wide family of drives, together with the SCSI-2/SCSI-3 Interface Product Manual P/N 77738479 (Vol. 2, Version 2) which describes the general interface characteristics of this and other families of Seagate 3.5-inch drives.
The drive interface supports multiple initiators, disconnect/reconnect, self configuring host software and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets
(logical block addressing is used).
The Head/Disc Assembly (HDA) is environmentally sealed at the factory. Air recirculates within the HDA through a nonreplaceable filter to maintain a contamination free head/disc environment.
Refer to Figure 3.0-1 for an exploded view of the drive. NEVER disassemble the Head/Disc Assembly (HDA).
This exploded view is for information only. Do not attempt to service items in the sealed environmental enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no parts replaceable by the user. The drive warranty is voided if the HDA is opened.
The ST12400 wide family drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when the power is removed.
The ST12400 wide family drives incorporate an automatic shipping lock which prevents potential damage to the heads and discs that result from movement during shipping and handling. The shipping lock disengages when power is applied to the drive and the head load process begins.
The ST12400 wide family drives decode Track 0 location from the dedicated servo surface to eliminate mechanical transducer adjustments and related reliability concerns.
The ST12400 wide family drives use a high performance actuator assembly that consists of a low inertia, balanced, patented, straight arm design that provides excellent performance with minimum power dissipation.
4 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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ST12400W/WD PCB
Figure 3.0-1. Hawk 2 family (Wide bus) drive
ST12400WC PCB
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 5
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4.0
Standard features
The Hawk 2 Family (Wide bus) has the following standard features:
•
Integrated SCSI Controller
•
Differential SCSI drivers and receivers
•
8 or 16 bit parallel data transfer
•
Asynchronous and Synchronous data transfer protocol
•
Firmware downloadable via SCSI interface
•
Selectable sector size from 256 to 4096 bytes/sector
•
Programmable sector reallocation scheme
•
Flawed sector reallocation at format time
•
Programmable auto write and read reallocation
• Reallocation of defects on command (Post Format)
•
96 bit Reed-Solomon error correcting code
•
Sealed Head/Disc Assembly
•
No preventative maintenance or adjustment required
•
Dedicated head landing zone
•
Automatic shipping lock
•
Automatic Thermal Compensation
•
Patented Tri-Phase Servo with embedded Grey Code track address to guarantee servo positioning.
•
Self diagnostics performed at power on
•
1:1 Interleave
•
Zoned Bit Recording (ZBR)
•
Vertical, horizontal, or top down mounting
•
Dynamic spindle brake
•
Synchronous spindle capability
•
256 K byte data buffer
4.1
Performance
•
Programmable multi-segmentable cache buffer
•
5411 RPM Spindle. Average latency = 5.54 ms
•
Command Queuing of up to 64 commands per initiator
•
Background processing of queue
•
Supports start and stop commands
•
Provides synchronized spindle capability
•
Low audible noise for office environment
•
Low power consumption
4.1.1
Reliability
•
500,000 hour MTBF
•
Adaptive seek velocity. Improved seek performance
•
LSI circuitry
•
Balanced low mass rotary voice coil actuator
• 5 year warranty
6 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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4.2
Unformatted and formatted capacities
Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows some typical formatted capacities.
Spare Sectors or Cylinders
Reserved for reallocation
ST12400W/WD/WC
512*
MB
2165
1024*
2279 No Spares
12 Spare Sectors per cyl.
2 Spare Cylinders per Unit**
One Spare Sector per cyl.
2 Spare Cyl. per Unit**
Unformatted Capacity
2148
2162
2537
2245
2275
*Bytes per sector. Sector size selectable at format time. Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities than those listed. User available capacity depends on spare reallocation scheme selected. See Mode Select Command and Format Command in the SCSI Interface Product Manual P/N 77738479.
**Spare cylinders are on the inner tracks.
The standard OEM model is as follows:
Formatted Data Block Size*
512 Byte/Sector
Unformatted
ST12400W/WD/WC 2148 MB 2537 MB
*Twelve spare sectors per cylinder (all 12 spare sectors are on one track), two spare cylinders/unit.
4.3
Options (factory installed)
The capacities shown in paragraph 4.2 are available upon request. Other capacities can be ordered depending on sparing scheme and sector size requested.
The following options are incorporated at the time of production. See Section 12.0.
• Front panel (green LED) - See Figure 3.0-1
•
Installation Guide P/N 77767465
•
1 MB data buffer
4.4
Optional accessories (user installed)
The following accessories are available. All kits may be installed in the field. See Section 13.0.
•
Front Panel Kit (with green LED) - See Figure 3.0-1
•
Single Unit shipping pack kit
•
Installation Guide P/N 77767465
•
Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch ST12400W/WD drive to fit in 5.25-inch drive
mounting space, does not work for model ST12400WC).
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 7
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4.5
Installation
For option jumper locations and definitions refer to Figure 10.1-1a and 10.1-1b. Drive default mode parameters are not normally needed for installation. Refer to Section 11.3.2 for default mode parameters if they are needed.
•
Ensure that the SCSI ID of the drive is not the same as the host adapter. Host adapters probably use SCSI
ID 7 or 15.
•
If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on the bus.
•
If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Terminators must be installed external to the drive. These external terminators must be provided by the user, systems integrator or host equipment manufacturer.
•
If the drive is attached to a bus that contains other devices, and the new drive is not attached to the end of the bus, terminators should not be installed at the new drive.
•
Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after power has been applied, recycle the drive power to make the new settings effective.
•
Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary see section 14.0 for Seagate support services telephone numbers.
Formatting
•
It is not necessary to low level format this drive. The drive is shipped from the factory low level formatted in
512 byte sectors.
•
Reformat the drive if one of the following occurs.
- A different sector size is selected.
- A different spare sector allocation scheme is selected.
8 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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5.0
Performance characteristics
5.1
Internal drive characteristics (transparent to user)
Drive Capacity
Read/Write Heads
Bytes/Track
Bytes/Surface
Tracks/Surface, Total
Tracks/Inch
Servo Heads
Internal Data Rate
Disc Rotational Speed
Average Rotational Latency
5.2
ST12400W/WD/WC
2537 MByte (UNF)
19
50,945
Data (Max)
Bytes (Avg)
131.3
2621
Mbytes (UNF)
Tracks (user
accessible)
TPI 3000
1
26.8 to 45.6 Mbits/sec
(variable with
5.54
zone)
5411 +0.5% r/min
ms
SCSI Seek, Read and Write performance characteristics (visible to user) [8]
Refer to Section 11.7 and to the SCSI-2/SCSI-3 Interface Product Manual 77738479 for additional timing details.
5.2.1
Seek time
Average Typical [3]*
Max.
[2]
Drive Level
ST12400W/WD/WC
Read
ms
Write
9.3
11.1
10.8
12.6
Single Track Typical [3]
Max.
[2]
Full Stroke Typical [3]
Max.
[2]
1.0
1.5
21.0
23.0
1.7
2.0
22.5
24.0
Average Typical [3]
Max.
[2]
Single Track Typical [3]
Max.
[2]
Full Stroke Typical [3]
Max.
[2]
Including Controller Overhead
(without disconnect) [1] [4]
ST12400W/WD/WC
Read Write
10.3
ms
12.1
11.8
13.6
2.0
2.5
22.0
24.0
2.7
4.0
23.5
25.0
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5.2.2
Format drive command execution time (minutes) [1]
Maximum (with verify)
Maximum (no verify)
ST12400W/WD/WC
45 Min.
31 Min.
*[ ] All notes are listed in Section 5.3.1.
5.2.3
Read data command execution time [4]
(512 byte sector size, without disconnect and with read look ahead cache disabled) latency time is included.
a.
From CDB reception to the drive request for the first data byte to be transferred to the Host
ST12400W/WD/WC
ms
1.
Typical (Zero Stroke Seek)
2.
Typical (Average Seek)
7.32 [3]*
16.84 [3]
3.
Maximum (Full Stroke Seek) 31.38 [2] b.
Single Sector Read and Transfer of data to Host (time from receipt of last byte of the CDB to the request for a status byte transfer to Host) [7].
ST12400W/WD/WC
ms
1.
Typical (Zero Stroke Seek)
2.
Typical (Average Seek)
7.42 [3]
16.95 [3]
3.
Maximum (Full Stroke Seek) 31.49 [2]
5.2.4
Write data command execution time [4]
(512 byte sector size, without disconnect and with read look ahead disabled) latency time is included.
a.
From CDB reception to the request for the first byte of write data from the Host.
1.
Typical 1.49 ms 2.
Maximum 1.61 ms b.
Single Sector Write and Data Transfer from Host [7] [6]
(Time from receipt of the last byte of the CDB to the request for a completion status transfer to the Host)
ST12400W/WD/WC
ms
1.
Typical (Zero Stroke Seek)
2.
Typical (Average Seek)
7.72 [3]
17.10 [3]
3.
Maximum (Full Stroke Seek) 31.93 [2]
*[ ] All notes are listed in Section 5.3.1.
10 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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5.3
Generalized performance characteristics
Minimum Sector Interleave 1 to 1
Data Buffer To/From Disc Media
Data transfer rate (< 1 sector) - 512 Byte Sector
Min. [4]* 3.35 MByte/sec
Avg. [4] 4.59 MByte/sec
Max. [4] 5.35 MByte/sec
Data Buffer To/From Disc Media
Data Transfer Rate (< 1 Track) - 512 Byte Sector
Min. [4] 2.88 MByte/sec divided by (Interleave Factor)
Avg. [4] 3.94 MByte/sec divided by (Interleave Factor)
Max. [4] 4.6 MByte/sec divided by (Interleave Factor)
SCSI Interface Data
Transfer Rate (Asynchronous) [5]
-Maximum Instantaneous
-Maximum Average
ST12400W/WC
5.2** MBytes/sec
3.1 MBytes/sec
Sector Sizes 512 user data blocks (default)
Variable (256 to 4096) in even sector sizes
ST12400WD
3.3 MBytes/sec
2.4 MBytes/sec
Synchronous Transfer Rate
From 1.25 MByte/sec to 20.0 MBytes/sec (See section 11.5.)
Read/Write consecutive sectors on a track Yes
Negligible Flaw reallocation performance impact (For flaws reallocated using the spare sectors per track reallocation scheme.)
Flaw reallocation performance impact (For flaws reallocated using the spare sectors per cylinder reallocation scheme.)
Flaw reallocation performance impact (For flaws reallocated using the spare tracks per volume reallocation scheme.)
Overhead time for head switch (512 byte sectors)
Overhead time for one track cylinder switch
Average rotational latency
* [ ] All notes are listed in Section 5.3.1.
** Assumes system ability to support 5.2 Mb/s and no cable loss.
Negligible
35 ms (typical)
1 ms
<3 ms Typical
5.54 ms
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 11
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5.3.1
Notes for sections 5.2 and 5.3.
[1] Execution time measured from receipt of the last Byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).
[2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive orientation. When comparing specified seek times, care should be taken to distinguish between typical seek times and maximum seek times. The best comparison is obtained by system benchmark tests conducted under identical conditions.
[3] Typical Seek values are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives.
[4] Assumes no errors and no sector has been relocated.
[5] Rate measured from the start of the first sector transfer to or from the Host.
[6] Assumes the Initiator immediately sends Write Data to the drive when requested.
[7] Command execution requires a data transfer phase (data to or from the disc media). Assumes the initiator is instantly ready to send/receive the data when the drive generates first request for a data byte transfer, and assumes an average data transfer rate between the drive and the Initiator as specified in section 5.3.
[8] All performance characteristics assume that automatic adaptive temperature compensation is not in process when the SCSI command is received. A SCSI command being executed is not interrupted for automatic adaptive temperature compensation. If adaptive thermal compensation is in process when a
SCSI command is received, the command is queued until the compensation for the specific head being compensated completes. When compensation completes for the specific head being compensated, the first queued SCSI command is executed. When execution of the first queued command is complete, the drive continues the compensation for the remaining head(s). The above procedure continues until compensation for all heads is completed or until one minute has elapsed. If the compensation for all heads is not complete in one minute the drive performs compensation for all of the remaining heads sequentially without any interruption. The drive initiates an automatic adaptive temperature compensation cycle approximately one minute after power-on, and approximately once every 10 minutes thereafter. Automatic adaptive temperature compensation takes less than 0.1% of bus time. Automatic temperature compensation also occurs at other times, but should be transparent to the user (e.g., during format, Rezero
Command, at spindle up, during read error recovery, and during Reassign Block functions). A Rezero command can be used to reset the thermal compensation timer back to its start so that the host can know when the interruption for thermal compensation will occur.
5.4
Start/stop time
After DC power has been applied, the drive becomes ready within 25 seconds if the Motor Start Option is disabled (i.e. the motor starts as soon as the power has been applied). During this time the drive responds to some commands over the SCSI interface* in less than 3 seconds. Stop time is less than 20 seconds from removal of DC power.
__________
*See SCSI Interface Manual P/N 77738479.
12 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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If the Motor Start Option is enabled the internal controller accepts the commands listed in the SCSI Interface
Product Manual* less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 15 seconds. The Motor Start Command can also be used to command the drive to stop the spindle*.
There is no power control switch on the drive.
5.5
Prefetch/multi-segmented cache control
The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when it is used in “cache” operations. To select prefetch and cache features the host sends the Mode Select command with the proper values in the applicable bytes in Mode Page 08h*. Prefetch and cache operation are independent features from the standpoint that each is enabled and disabled independently via the Mode
Select command. However, in actual operation the prefetch feature overlaps cache operation somewhat as is noted in sections 5.5.1 and 5.5.2.
All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Tables 11.3.2-1 through 11.3.2-4.
5.5.1
Cache operation
In general, 240 kBytes of the 256 kBytes of physical buffer space in the drive can be used as storage space for cache operations (984 KB of 1 MB for drives having 1 MB optional buffer). The buffer can be divided into logical segments (Mode Select Page 08h, byte 13) from which data is read and to which data is written. The drive maintains a table of logical block disk medium addresses of the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product
Manual*), data requested by the host with a Read command is retrieved from the buffer (if it is there), before any disc access is initiated. If cache operation is not enabled, the buffer (still segmented with required number of segments) is still used, but only as circular buffer segments during disc medium read operations
(disregarding Prefetch operation for the moment). That is, the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. All data transfers to the host are in accordance with
“buffer-full” ratio rules. See explanations associated with Mode page 02h (disconnect/reconnect control) in the SCSI Interface Product Manual*.
The following is a simplified description of a read operation with cache operation enabled:
Case A - A Read command is received and the first logical block (LB) is already in cache:
1.
Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already in the cache. This data may be in multiple segments.
2.
When the requested LB is reached that is not in any cache segment, the drive fetches it and any remaining requested LB’s from the disc and puts them in a segment of the cache. The drive transfers the remaining requested LB’s from the cache to the host in accordance with the disconnect/reconnect specification mentioned above.
3.
If the prefetch feature is enabled, refer to section 5.5.2 for operation from this point.
_________
*SCSI Interface Product Manual P/N 77738479.
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Case B - A Read command requests data, the first LB of which is not in any segment of the cache:
1.
The drive fetches the requested LB’s from the disc and transfers them into a segment, and from there to the host in accordance with the disconnect/reconnect specification referred to in case A.
2.
If the prefetch feature is enabled, refer to section 5.5.2 for operation from this point.
Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of which is an integer number of disc medium sectors. The wrap-around capability of the individual segments greatly enhances the buffer’s overall performance as a cache storage, allowing a wide range of user selectable configurations, which includes their use in the prefetch operation (if enabled), even when cache operation is disabled (see section 5.5.2). For the ST12400 wide family the number of segments may be selected using the Mode Select command, but the size can not be directly selected. Size is selected only as a by-product of selecting the segment number specification. The size in Kbytes of each segment is reported by the Mode
Sense command page 08h, bytes 14 and 15. If a size specification is sent by the host in a Mode Select command (bytes 14 and 15) no new segment size is set up by the drive, and if the “STRICT” bit in Mode page
00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change unchangeable parameters (see SCSI I/O Product Manual*). The ST12400 wide family of drives supports operation of any integer number of segments from 1 to 16. Divide the 245,760 bytes (or 1,007,616 bytes for optional 1 MB buffer) in the buffer by the number of segments to get the size (in bytes) of each segment.
5.5.2
Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which was requested by a Read command can be retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks (this is true even if “cache” operation is disabled). Though the prefetch operation uses the buffer as a “cache”, finding the requested data in the buffer is a prefetch “hit”, not a “cache” operation “hit”. Prefetch is enabled using Mode
Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize system performance. The drive never prefetches more logical blocks than the number specified in the prefetch logical blocks ceiling bytes (8 and 9) of Mode page 08h.
During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if the Discontinuity
(DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.
The operation of the prefetch feature (when enabled by DRA = 0) can be modified to an adaptable prefetch mode, wherein prefetch is disabled as long as two sequential read operations are not for contiguous blocks of data. If two sequential Read operations request contiguous logical blocks of data, the drive automatically enables the prefetch feature for the end of the second Read operation. As long as sequential Read operations request contiguous LB’s of data, prefetch operation remains enabled.
If the host uses software interleave, there will not likely ever be two sequential Read operations for contiguous LB’s, so the adaptive prefetch feature keeps prefetch disabled, even if the DRA bit enables it. Adaptive prefetch is enabled when the IC (Initiator Control) bit (Mode page 08h, byte 2, bit 7) is set to 0 and when DRA.
= 0 (prefetch enabled).
__________
*SCSI-2/SCSI-3 Interface Product Manual, P/N 77738479.
14 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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5.6
Caching write data
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored in one or more segments while the drive performs the write command.
Write caching is enabled along with read caching. For write caching, the same buffer space and segmentation is used as set up for read functions. The buffer segmentation scheme is set up or changed independently, having nothing to do with whether or not read and write caching is enabled or disabled. When a write command is issued, the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If there are, the respective cache segments are cleared. The new data is cached for subsequent Read commands.
If the number of write data logical blocks exceeds the size of the segment being written into when the end of the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that was written there at the beginning of the operation. However, the drive does not overwrite data that has not yet been written to the medium.
Tables 11.3.2-1 through 11.3.2-4 show Mode default settings for the Hawk 2 (wide bus) family of drives.
5.7
Synchronized spindle operation
The synchronized spindles operation allows several drives operating from the same host to operate their spindles at the same synchronized rotational rate. Drives operating in a system in synchronized mode can increase the system capacity and transfer rate in a cost effective manner.
For "W" and "WD" models the interface consists of a twisted pair cable that connects the drives in the synchronized system in a daisy-chain configuration as shown in Figure 5.7-1. For "WC" models the reference index signal ("SYNC") signal is on pin J1-37 of the 80-pin I/O connector. Master/Slave operation is autoarbitrated by each drive after head load. Alternatively, each drive in the system can be configured by the host (using the
Mode Select command Rigid Disc Drive Geometry page*) to operate in either the master or slave mode.
After loading heads, a drive autoarbitrates for occurences of the Reference Index Signal (REFIND+). If the drive detects no REFIND+ signal on the line, it assumes master status and begins generating the REFIND+ signal. This signal will not be visible on the line until the last drive has powered up, since any unpowered drive holds the line low.
Using Mode Select command, drives can be re-configured by the host to be master or slave any time after the last drive has powered up. The master provides the reference signal to which all other drives phase lock, including the master. The master can be a drive or the host computer. All the drives may be configured as slaves, allowing the host to provide the REFIND+ signal. All drives default to the synchronized mode when powered up, unless J6 pins 5 and 6 are jumpered.
Each drive can be configured (jumpered) for the non-synchronized mode in which it ignores any reference signal that might be present. The connection of the synchronized reference signal to the host is required only if the host is to provide the reference signal. If the host does not provide the reference signal, the host should not be connected.
__________
*SCSI Interface Product Manual P/N 77738479.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 15
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Bottom side of PCB
2
6
4
DLYIND+
J7
32
J2
Sync Interface REFIND +
Master Sync
Source
Host
(or other drive)
J1
Spindle
Control
37 [2]
47
+5V
R
T
Drive 1
SCSI Bus
System
Interface
J1
Spindle
Control
37 [2]
47 +5V
R
T
Drive 2
J6-6 or
J1-6A [1]
J6-10 or
J1-10A
J6-6 or
J1-6A [1]
J6-10 or
J1-10A
J1
Spindle
Control
37 [2]
47 +5V
R
T
Drive n
J6-6 or
J1-6A [1]
J6-10 or
J1-10A
J1
Notes:
[1]
[2]
Configuration select header. See Figure 10.1-1a, 10.1-1b and 10.2.1-1.
This connection available only on Model ST12400WC.
Figure 5.7-1. Synchronized drive interconnect diagram
16 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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The servo/read-write LSI on the master drive provides the reference signal (REFIND+). It is a 90.18 Hz crystal generated signal. The signal is normally false/negated (nominal 0 V) and makes a transition to the true/asserted (nominal +5 V) level to indicate the reference position during the revolution period. The trailing
(falling) edge of the reference signal is used by the master and the slave drives to phase lock their spindles.
A maximum of 10 seconds is allowed for a slave to synchronize with the reference signal. The DLYIND+ signal (available on J7-6 See Figure 5.7-1) of each synchronized drive shall occur 85.2 µsec ±20 µsec after the REFIND+ signal. Figure 5.7-2 shows the characteristics of the reference signal.
T
1
REFIND +
0
0.5 usec min.
500 usec max.
T = 0.0111 second (+/- 1.0% max); +/- 10 µsec cycle to cycle variance;
Figure 5.7-2. Synchronized reference signal characteristics
The physical characteristics of the synchronized spindle interface are described in Section 10.2.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 17
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SCSI Interface Factors
The Rotational Position Locking (RPL) field in byte 17 (bits 0 and 1) of the Rigid Disc Drive Geometry mode parameters page (page 04h) is used for enabling/disabling spindle synchronization mode*. If the target fails to achieve synchronization, it shall create a unit attention to all initiators. The sense key shall be set to UNIT
ATTENTION and the additional sense code set to RPL STATUS CHANGE. However, in automatic arbitration mode, UNIT ATTENTION and the RPL STATUS CHANGE is not set.
If subsequent to achieving synchronization the target detects a change of synchronization:
1) and, if the logical unit is not presently executing an I/O process for the initiator, the target shall create a unit attention condition. The sense key shall be set to UNIT ATTENTION and the additional sense code set to RPL STATUS CHANGE.
2) and, if the logical unit is presently executing an I/O process and no other error occurs, the target shall return CHECK CONDITION status. The sense key shall be set to RECOVERED ERROR if the target is able to complete the I/O process or HARDWARE ERROR if the target is unable to complete the I/O process. The additional sense code is set to RPL STATUS CHANGE.
The drive may be operated with a rotational skew when synchronized. The rotational skew is applied in the retarded direction (lagging the synchronized spindle master control). A rotational offset of up to 255/256 of a revolution lagging may be selected. The amount of offset is selected by using the Mode Select command,
Rigid Disc Drive Geometry page (page 04), byte 18*. The value in byte 18 (0 - FFh) is the numerator of a fractional multiplier that has 256 as the denominator. For example, 40h selects 40h/FFh or 1/4 of a revolution lagging skew, 80h selects 1/2 revolution lagging skew and etc. Since the drive supports all offset values from
0 to 255, values sent by the initiator are not rounded off. The drive translation of the digital offset values to physical rotational offsets results in offset values whose phase error lies within the + or - 20 µsec phase error with respect to the supplied 90.18 Hz reference signal.
The drive does not have the capability to adjust the rotational offset value requested by the initiator to a physical offset in the drive that corresponds in any way to sector boundaries or changes in ZBR zones. Such correspondences or changes, if required, must be formulated by the initiator in order for it to calculate the value of offset it sends to the drive.
__________
*SCSI Interface Product Manual P/N 77738479.
18 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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6.0
Reliability specifications
The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, and environmental requirements.
Less than 1 in 107 seeks Seek Errors
Read Error Rates [1]
Unrecovered Data
Miscorrected Data
MTBF
Service Life
Preventive Maintenance
Less than 1 sector in 1014 bits transferred
Less than 1 sector in 1021 bits transferred
500,000 hours
5 years
None required
Note.
[1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
6.1
Error rates
The error rates stated in this specification assume the following:
The drive is operated per this specification using DC Power as defined in this specification (see Section 7.2).
•
The drive has been formatted with the SCSI FORMAT commands.
•
Errors caused by media defects or host system failures are excluded from error rate computations.
Refer to Paragraph 8.0, Media Characteristics.
6.1.1
Read errors
Before determination or measurement of read error rates:
•
The data that is to be used for measurement of read error rates must be verified as being written correctly on the media.
•
All media defect induced errors must be excluded from error rate calculations.
6.1.2
Environmental interference
When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance of the drive within the system shall be considered acceptable if the drive does not generate an unrecoverable condition.
An unrecoverable error, or condition, is defined as one that:
1.
Is not detected and corrected by the drive itself;
2.
Is not capable of being detected from the error or fault status provided through the drive or SCSI interface; or
3.
Is not capable of being recovered by normal drive or system recovery procedures without operator intervention.
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6.1.3
Write errors
Write errors can occur as a result of media defects, environmental interference, or equipment malfunction.
Therefore, write errors are not predictable as a function of the number of bits passed.
If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified as a failure affecting MTBF. Unrecoverable write errors are those which cannot be corrected within two attempts at writing the record with a read verify after each attempt (excluding media defects).
6.1.4
Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. There shall be no more than one recoverable seek error in 107 physical seek operations. After detecting an initial seek error, the drive automatically reseeks to the addressed track up to 3 times. If a reseek is successful, the Extended
Sense reports a seek positioning error (15h), no seek complete error (02h), or track follow error (09h), and the sense key reports a recovered error (1h). If all three reseeks fail, a seek positioning error (15h) is reported with a Medium (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error.
Unrecoverable seek errors are classified as failures for MTBF calculations. Ref. section 5.1.1.2 of SCSI-2
Interface Product Manual P/N 77738479.
6.2
6.2.1
Reliability and service
Mean time between failure
The production disc drive shall achieve an MTBF of 500,000 hours when operated in a benign atmosphere at an average disc drive ambient temperature of 95°F (35°C) or less as measured per this Product Specification, paragraph 7.4.1. Short term excursions up to the specification limits of the operating environment will not affect MTBF performance.
The following expression defines MTBF:
Estimated power-on operating hours in the period
MTBF per measurement period =
Number of drive failures in the period
Estimated power-on operation hours means power-up hours per disc drive times the total number of disc drives in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be calculated on a rolling average base for a minimum period of six months.
Drive failure means any stoppage or substandard performance caused by drive malfunction.
6.2.2
Preventive maintenance
No routine scheduled preventive maintenance shall be required.
6.2.3
Service life
The drive shall have a useful service life of five years. Depot repair or replacement of major parts is permitted during the lifetime (6.2.4).
20 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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6.2.4
Service philosophy
Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must be performed only at a properly equipped and staffed service and repair facility. Troubleshooting and repair of
PCBs in the field is not recommended, because of the extensive diagnostic equipment required for effective servicing. Also, there are no spare parts available for this drive. Drive warranty is voided if the HDA is opened.
6.2.5
Installation
The drive is designed, manufactured, and tested with a “Plug in and Play” installation philosophy. This philosophy minimizes the requirements for highly trained personnel to integrate the drive into the OEM’s system, whether in a factory or field environment.
The drive has been low level formatted at the factory and need not be reformatted.
6.2.6
Service tools
No special tools are required for site installation or recommended for site maintenance. Refer to Paragraph
6.2.4. The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not practical since there are no user purchasable parts in the drive.
6.2.7
Product Warranty
Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants that each product (including components and sub-assemblies) or spare part that fails to function properly under normal use due to defect in materials on workmanship or due to non conformance to the applicable specifications will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty
Procedure. Seagate will pay for transporting the repaired or replacement item to customer. For more detailed warranty information refer to the Standard terms and conditions of Purchase for Seagate products.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 21
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7.0
Physical/electrical specifications
7.1
7.2
AC power requirements: None
DC Power requirements
The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector.
Table 7.2-1. DC power requirements
Voltage
Regulation [5]
Average Idle Current [1] [3]
Single Ended (W/WC) Differential (WD)
+5 V
+5%
0.43 A
+12 V
+5%[2]
0.57 A
Maximum Starting Current (Peak) [6] 0.8 A 2.4 A
+5 V
+5%
0.57 A
0.9 A
+12 V
+5%[2]
0.66 A
2.4 A
Delayed Motor Start (Max) [4] [6]
Operating Current [7]
0.6 A 0.4 A 0.6 A 0.4 A
Typ. [1]
Max. [1]
Max. (Peak)
0.78 A
1.0 A
-
0.68 A
1.0 A
2.4 A
1.05 A
1.2 A
-
0.78 A
1.0 A
2.4 A
[1] Measured with average reading DC ammeter. Instantaneous +12 V currentpeaks will exceed these values.
[2] A droop of up to -10% is permissible during power up. The +5% must be maintained after the drive signifies that its power up sequence has been completed and that the drive is able to accept selection by the Host Initiator.
[3] See +12 V current profile level T6 in Figure 7.2.2-1.
[4] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start
Motor command.
[5] See paragraph 7.2.1 “Conducted Noise Immunity”.
[6] Peaks of 0.90 A (nominal) on the +12 V will occur for no more than 100 ms total during the first 250 ms after power is applied.
[7] Instantaneous peaks less than 5 msec. in duration are allowed.
General Notes from Table 7.2-1:
1.
At powerup, the motor current regulator limits the 12 volt current to a peak value of less than 2.4 amperes, although instantaneous peaks may exceed this value. These peaks should measure 5 msec.
duration or less.
2.
Operating condition is defined as Random Seek Reads of 64 blocks.
3.
Minimum current loading for each supply voltage is not less than 30% of the maximum operating current shown.
4.
The +5 and +12 volt supplies shall employ separate ground returns.
5.
Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device.
22 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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7.2.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 mHz.
Maximum allowed noise values given below are peak to peak measurements and apply at the drive power connector.
+5 V = 150 mV pp from 0 to 100 kHz and 45 mA pp from 100 kHz to 10 mHz.
+12 V = 150 mV pp from 0 to 100 kHz and 60 mA pp from 100 kHz to 10 mHz.
7.2.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power up and down. Daisychain operation requires that power be maintained on the terminated drive to ensure proper termination of the peripheral I/O cables.
7.2.3
12 V - current profile
Figure 7.2.2-1 identifies the drive +5 V and +12 V current profile. The current during the various times is as shown:
T Power is applied to the drive.
T1 Controller self tests are performed.
T2 Spindle begins to accelerate under current limiting after performing internal diagnostics. See Note 1 of
Table 7.2-1.
T3 The spindle is up to speed and the Head-Arm restraint is unlocked.
T4 The heads move from the landing zone to the data area.
T5 The adaptive calibration sequence is performed.
T6 Calibration is complete and the drive is ready for reading and writing.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 23
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Note.
All times and currents are typical. See Table 7.2-1 for maximum current requirements.
1.0
5V
Current .5
CH1 GND
T1 T2
T3 T4
T5 T6
2.0
1.5
12V
Current
1
.5
T
Channel 1
2 s .5 Amps
18
Channel 2
2 s .5 Amps
CH2 GND
0 2 4 6 8
Seconds
10 12 14
Figure 7.2.2-1. Typical ST12400 wide family drive +5 V and +12 V current profile
16
7.3
Heat/power dissipation
For drives with single ended interface circuits, typical operating power dissipation is 12.1 watts (41.3 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 9.0
watts (30.7 BTUs per hour).
For drives having differential interface circuits, typical operating power dissipation is14.6 watts (49.8 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 10.8
watts (36.8 BTUs per hour).
7.4
Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at
58.7°F (14.8°C). Maximum Wet Bulb temperature is 82°F (28°C).
24 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C
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7.4.1
Temperature a.
Operating
The drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the locations specified in Table 7.4.1-1, column 1 are not exceeded. Air flow may be needed to achieve these temperature values. Operation at case temperatures above these values may adversely affect the drive's ability to meet specifications.
The MTBF specification for the drive is based on operating at an ambient temperature of 95°F (35°C) with no air flow. Occasional excursions to drive ambient temperatures of 50°C or 5°C may occur without impact to specified MTBF. To achieve the specified MTBF, the values of Table 7.4.1-1 Column 2 must be considered maximum average operating case temperatures. Continual or sustained operation at case temperatures above the values shown in Column 2 may degrade MTBF.
Table 7.4.1-1. PCB and HDA temperatures
Items in
Figure
7.4.1-1
HDA
U2
U8
Q2
Q13
Column 1
Maximum Case
60 [2]
80
65
64
72
Column 2
Typical Case
Temperatures (oC) Temperatures (oC)
Operating 50°C Ambient [3] at 35°C Ambient [1]
56
72
50
63
67
Notes.
[1] The temperatures in Column 2 were made in an enclosed box with no airflow at a pressure of one atmosphere, with random seeks.
[2] No point on the top of the HDA shall exceed this temperature.
[3] Ambient temperature is measured at the side of the drive 0.25" (6.4 mm) from the case. Air flow is
3.5 cfm, min.
b.
Non-Operating
-40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with the drive.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C 25
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Model ST12400W PCB *
U2
U17
U7
U8
U16
U5
U15
U2Ø
U11
U3
Q13
U4
U1
Q4
Q1
Q2
U10
U14 U13
J1
Model ST12400WC PCB *
SEAGATE
Model ST12400WD PCB *
HDA
U2
U17
U7
U8
U16
U15 U11
U2Ø
U3
Q13
U4
U1
Q4
Q1
Q2
U5
U10
J1
*
Bottom side of PCB
Figure 7.4.1-1. Locations of components listed in Table 7.4.1-1
U2
U17
U7
U8
U16
U15
U2Ø
U11
U3
Q13
U4
U1
Q4
Q1
Q2
U24
U5 U19 U1Ø U18
J1
26 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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7.4.2
Relative humidity
The values below assume that no condensation on the drive occurs.
a.
Operating
8% to 80% relative humidity with a maximum gradient of 10% per hour.
b.
Non-Operating
5% to 95% relative humidity.
7.4.3
Effective altitude (Sea level reference) a.
Operating
-1000 to +10,000 feet (-305 to +3048 metres) b.
Non-Operating
-1000 to +40,000 feet (-305 to +12,210 metres)
7.4.4
Shock and vibration
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonance’s may occur internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent, it may be necessary to modify the enclosure to minimize drive movement.
The limits of shock and vibration defined within this document are specified with the drive mounted by any of the four methods shown in Figure 7.4.4-1.
7.4.4.1
Shock a.
Operating
The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not exceeding 10 g’s at a maximum duration of 11 ms (half sinewave). Shock may be applied in the X, Y, or Z axis.
b.
Nonoperating
The limits of nonoperating shock shall apply to all conditions of handling and transportation. This includes both isolated drives and integrated drives.
The drive subjected to nonrepetitive shock not exceeding 60 g’s at a maximum duration of 11 ms (half sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X,
Y, or Z axis.
c.
Packaged
The drive as packaged in a single or multiple drive pack of gross weight 20 pounds (8.95 kg) or less by
Seagate for general freight shipment shall withstand drop test from 42 inches (1070 mm) against a concrete floor or equivalent. For additional details refer to specification 30190-001 (under 100 lbs.) or
30191-001 (over 100 lbs.)
Package Size
600–1800 in
3
(9,832-29,502 cm
3
)
>1800 in (>29,502 cm
3
)
Drop Height
48 in (121 cm)
42 in (106 cm)
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 27
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SEAGATE
C
D
A
B
E
A 1
B
1
SEAGATE
Z
Y
X
C
1
D
1
E
1
C
1
B 1
D
1
A
B
Z
X
Y
A
1
E
1
E
C
D
Figure 7.4.4-1. Recommended mounting
28 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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7.4.4.2
Vibration a.
Operating
The drive, as installed for normal operation, shall operate error free while subjected to continuous vibration not exceeding
5-22 Hz @ 0.040 inches (1.03 mm) displacement peak-to-peak
22-400 Hz @ 1.0 g
Vibration may be applied in the X, Y, or Z axis.
b.
Nonoperating
The limits of nonoperating vibration shall apply to all conditions of handling and transportation. This includes both isolated drives and integrated drives.
The drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding
5-22 Hz @ 0.081 inches (2.05 mm) displacement peak-to-peak
22-400 Hz @ 2.00 g’s
Vibration may be applied in the X, Y, or Z axis.
7.4.5
Air cleanliness
The drive is designed to operate in a typical office environment with minimal environmental control.
7.5
7.5.1
Electromagnetic compatibility
Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is the responsibility of the system integrator to perform those tests required to ensure that equipment operating in the same system as the drive does not adversely affect the performance of the drive. See section 6.1.2, and see Table 7.2-1, DC Power Requirements.
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7.6
Mechanical specifications
The following nominal dimensions are exclusive of the decorative front panel accessory. Refer to Figure 7.6-
1 for detailed mounting configuration dimensions.
Height:
Width:
Depth:
Weight:
1.62 in
4.00 in
5.74 in
1.9 pounds
41.1 mm
101.6 mm
145.8 mm
0.84 kilograms
[4]
C [3] G L
N
[2]
H
K
[1]
B
J
A
F
P
D
E
Notes:
[1] Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in.
(3.05 mm).
[2] Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0.20 in. (5.08 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in.
(3.05 mm).
[3] Power and interface connections can extend past the
"A" dimension by 0.040 in. (1.02 mm).
[4] Decorative front panel.
A
B
C
D
E
F
G
M
N
P
H
J
K
L
Inches Millimeters
5.74
4.00
1.620
2.362
.620
4.000
.250
1.750
3.750
2.370
1.725
4.000
0.19
0.015
±
±
+
–
±
±
±
–
±
±
±
±
+
0.005
0.010
0.010
0.010
0.010
±
± max
0.010
0.010
0.010
0.010
0.026
0.010
0.010
0.010
0.010
0.010
145.80
101.60
41.15
60.00
15.75
101.60
6.35
44.45
95.25
60.20
43.82
101.60
4.83
0.381
±
±
–
±
±
±
±
.25
.25
max
.12
.25
.25
.25
.25
±
±
+
+
–
±
±
±
.25
.25
.66
.25
.25
.25
.25
.25
[4]
M
Figure 7.6-1a. Model ST12400W/WC mounting configuration dimensions
7.6.1
Drive Orientation
The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive performance characterization, however, has been done with the drive in horizontal (discs level) and vertical
(drive on its side) orientations, and these are the two preferred mounting orientations.
30 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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C [3] G
[1]
D
F
E
A
L
Pin 1
B
Connector Centerline
[4]
J
Notes:
[1] Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in.
(3.05 mm).
[2] Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0.20 in. (5.08 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in.
(3.05 mm).
[3] Power and interface connections can extend past the
"A" dimension by 0.040 in. (1.02 mm).
[4] Connector is centered (side to side) on drive within
±0.020 in. (.508 mm).
[2]
H
K
H
J
K
L
D
E
F
G
A
B
C
5.74
4.00
1.620
2.362
.620
4.000
.250
1.750
3.750
2.370
0.181
±
+
–
±
±
±
±
+
–
±
+
±
±
–
Inches Millimeters
0.010
0.010
0.026
0.010
0.010
0.010
0.010
0.010
0.005
0.010
0.010
0.010
0.018
0.013
145.80
101.60
41.15
60.00
15.75
101.60
6.35
44.45
95.25
60.20
4.597
±
±
+
–
±
±
±
+
–
±
±
±
+
–
.25
.25
.66
.25
.25
.25
.25
.25
.12
.25
.25
.25
.45
.33
Figure 7.6-1b. Mounting configuration details for "WC" model drives
7.6.2
Cooling
Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in 7.4.1. Specific consideration should be given to make sure adequate air circulation is present around the PCBs to meet the requirements of 7.4.1.
7.6.3
Drive mounting
When mounting the drive using the bottom holes care must be taken to ensure that the drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in (14.0
N/mm). The following equation and paragraph define the allowable mounting surface stiffness:
K*x = 80 lb (14.0 N) where 'k' represents the mounting surface stiffness (units of lb/in or N/mm), and, 'k' represents the out-ofplane mounting surface distortion (units of inches or millimetres). The out-of-plane distortion ('x') is determined by defining a plane with three of the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a known force is applied to the fourth point.
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8.0
Media characteristics
8.1
Media description
The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The aluminum substrate is coated with a thin film magnetic material and overcoated with a proprietary protective layer for improved durability and environmental protection.
32 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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9.0
Defect and error management
The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator).
Defect and error management in the SCSI system involves the drive internal defect/error management and
SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use in designing a defect/error management plan are briefly outlined in this section, with references to other sections where further details are given.
9.1
Drive internal defects/errors
Identified defects are recorded on the drive defects list tracks (referred to as the primary or ETF defect list).
These known defects are reallocated during the initial drive format operation at the factory. (See Format Unit command Section 5.2.1.2 in SCSI Interface Product Manual P/N 77738479). Data correction by ECC can be applied to recover data from additional flaws if they occur.
Details of the SCSI commands supported by the drive are described in SCSI Product Interface Manual, P/N
77738479. Also, more information on the drive Error Recovery philosophy is presented in Section 6 of the
Interface Product Manual.
9.2
SCSI systems error considerations
Information on the reporting of operational errors or faults across the interface is given in SCSI Interface
Product Manual. Message Protocol System is described in the SCSI Interface Product Manual. Several of the messages are used in the SCSI systems error management system. The Request Sense command returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.
Status returned by the drive to the Initiator is described in the SCSI Interface Manual. Status reporting plays a role in the SCSI systems error management and its use in that respect is described in sections where the various commands are discussed.
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10.0
Option/configuration headers
10.1
Drive ID/option select header
Figure 10.1-1a shows a bottom view of the drive (PCB toward viewer) for the purpose of showing the drive ID and configuration option select jumper connectors for models ST12400W/WD. Figure 10.1-1c shows the jumper connectors for model ST12400WC. Figure 10.1-1b shows a rear view of the ST12400W/WD model drive for the purpose of showing J1-auxiliary which has a duplicate pin configuration and purpose of J6
(Figure 10.1-1a) on the rear of the drive. Both J1-auxiliary and J6 have pins for selecting drive ID and for connecting the synchronized spindle cable and the remote LED cable. Only one or the other should be used, although using both at the same time would not damage the drive. The notes ([1]-[9]) following the figures describe the functions of the various jumper positions on the three connectors J2, J1-auxiliary and J6. Suggested part number for the unusual J2 jumper is Molex 52747-0211 (Seagate P/N 77679052).
Drive with HDA up,
PCB down, viewed from front Pin 1
End
SCSI I/O
Connector
Pin 1
J6
HDA
J6
Drive Front
J1-SCSI I/O
+5V
Ground
[2] SCSI ID = 0
SCSI ID = 1
J2
J1-DC Power
Connector
SCSI ID = 2
SCSI ID = 3 J2
Pin 1
SCSI ID = 4 Jumper
Positions
R
E
S
D
S
M
E
W
P
P
E
T
E
T
P
T
P
SCSI ID = 5
Reserved
[3]
SCSI ID = 6
SCSI ID = 7
Delay
Motor Start
Enable
Motor Start
[2]
[2]
SCSI ID = 8
Write Protect
SCSI ID = 9
SCSI ID = 10
Parity Option
SCSI ID = 11
Enable
Terminators
[5]
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
Term. Power from Drive
Term. Power to SCSI Bus
Term. Power from SCSI Bus
[5]
[6]
[5]
SCSI ID = 15
Position A
A 3 A2 A1 A 0
11 9 7 5 3 1
[4] Host Alternate
Usage Plug:
+5V
8 6 4 2
Ground
Remote LED
SSP
[4] Dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage plug. Drive PCB circuitry for Pin 8 includes a 150 Ω series resistor.
Optional connections to switching circuits in host equipment to establish drive ID.
Pins 2, 4, 6 and 8 are driven low for
250 ms after PWR ON and reset to allow jumper selectable SCSI ID. [4]
J1-Auxiliary
See Figure
10.1-1b
[2]
Figure 10.1-1a. ST12400W/WD family drive ID and option select header (Front and side header details)
34 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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Drive HDA (rear view, PCB facing downward)
Pin 1 +5V Ground
J1-Auxiliary
Pin 1A
SCSI I/O Connector
J1
Pin 12A
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
[2]
4P 3P 2P
J1-DC Power
1P
PCB
SCSI ID = 6
SCSI ID = 7
[3]
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
A 3 A2 A1 A 0
11 9 7 5 3 1
[4] Host Alternate
Useage Plug:
+5V
8 6 4 2
Ground
Remote LED
SSP
[4] Dashed area is optional host circuitry (external to the drive) connected to host supplied optional useage plug. Drive PCB circuitry for Pin 8 includes a 150 Ω series resistor.
Optional connections to switching circuits in host equipment to establish drive ID.
Pins 2, 4, 6, and 8 are driven low for
250 ms after PWR ON and reset to allow jumper selectable SCSI ID. [4]
Figure 10.1-1b. ST12400W/WD family drive ID and option select header (Rear header details)
(J1-auxiliary pins 1A-12A)
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Drive with HDA up,
PCB down, viewed from front
Pin 1
HDA
Pin 1
End
J6
Drive Front
[7]
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
Sync Spindle
Remote LED
J6
SCSI ID = 0
SCSI ID = 1
A 3 A2 A1 A 0
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
[8]
J2
J2
Jumper
Positions
Reserved
R
E
S
D
S
M
E
W
P
P
E
Delay
Motor Start
Enable
Motor Start
Write Protect
Parity Option
[9] [9]
Remote LED
J1
Pin 1
[7]
CATH
Figure 10.1-1c.
ST12400WC family drive ID and option select header (front and side header details)
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Notes for Figure 10.1-1a, 10.1-1b and 10.1-1c:
[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J1-auxiliary and
J6 are given below in left to right order of jumper position. The term “default” means as standard OEM units are configured when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is installed. “Off” or “On” underlined is factory default condition.
[2] The PCB on "WC" models does not have connector J1-auxiliary, but has a single 80 pin combined SCSI
I/O and DC power connector instead of the pictured 68 pin SCSI I/O, J1-auxiliary and 4 pin DC power connectors. Included among the 80 pins are the SCSI ID, Motor Start and Delayed Motor Start select functions, and the synchronous spindle master sync signal (REFIND+) and the remote LED signals. Do not use J2 and J6 for these five functions if the host uses the ones included in the 80 pin connector. See
Table 11.6.3-1c for a list of pin numbers vs. signals for the 80 pin connector.
[3] Either jumper plugs in one of the patterns shown or external circuitry can be used to establish Drive ID.
The drive uses headers J6 or J1-auxiliary for drive ID determination only during a 250 ms initialization period following power-on or after a drive reset. During this initialization period, the drive control logic connects pins 2, 4, 6 and 8 to ground and checks the logic state of pins 1, 3, 5 and 7. A ground on a pin
1, 3, 5, 7 indicates an asserted low state, while an open circuit, high impedance or +5 V indicates a negated high state. The drive user can install jumper plugs to connect pins 2, 4, 6 and 8 to pins 1, 3, 5 and
7, respectively, in the desired ID pattern. See figures 10.1-1a and 10.1-1b. The drive only connects ground to pins 2, 4, 6 and 8 during the 250 ms initialization period. The user may install a cable on J6 or
J1-auxiliary in order to connect the drive ID pattern to pins 1, 3, 5 and 7 through some external switching circuit. The drive ID should be applied for at least the 250 ms period. During the remaining operational time of the drive, the drive does not poll pins 1, 3, 5 and 7 for drive ID, unless a reset occurs. See Note [4] for information on the use of pins 2, 4, 6 and 8 during non-initialization periods.
[4] During non-initialization periods when the drive does not connect ground to pins 2, 4, 6 and 8, these pins can be used for non-drive ID functions. Therefore, instead of using jumper plugs on J1-auxiliary to establish drive ID, a cable can be connected to either J6 or J1-auxiliary to connect the drive activity (busy) LED as shown and make parallel connections of pins 1, 3, 5 and 7 to external drive ID switching or jumpering circuits. If connected as shown, pin 8 lights the drive busy LED when the drive connects ground to that pin. Connection can be made to pin 6 to conduct the synchronized spindle reference signal, REFIND+ to the host and to other Seagate disk drives. Spindle synchronization typically works effectively only if all drives connected through pin 6 are identical in make and model. During the 250 ms initialization period the LED lights and the REFIND+ signal goes to 0 V.
J6 can be used to establish drive ID using jumpers (or remote ID selector) and a cable can be plugged simultaneously to J1-auxiliary to connect to the drive activity (busy) LED and the synchronized spindle signal SSP. The vice-versa arrangement is possible also. Two separate drive ID determining locations should not be used, however.
WP
On
Off
PE
On
Off
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[5] These jumper positions apply to model ST12400W only.
[6] This jumper position applies to models ST12400W and ST12400WD only.
[7] These signals are also on J1 (see Table 11.6.3-1c). The J2 and J6 jumper headers are not used if the J1 signals are used.
[8] Drive is probably shipped with this jumper installed, but it should be removed if the system uses REFIND+ on J1-37.
[9] These jumper positions do not apply to "WC" models.
J2
Jumper
Installation
RES
Off/On
DS ME
Off Off
Off On
On Off
On On
Jumper Function Description
Reserved. Default is no jumper installed.
Spindle starts immediately after power up - Default setting.
Drive spindle does not start until Start Unit command received from host.
Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0 spindle starts immediately when DC power connected, drive 1 starts after 12 second delay, drive 2 starts after 24 second delay, etc.
Drive spindle starts when Start Unit command received from host. Delayed start feature is overridden and does not apply when ME jumper is installed.
Entire drive is write protected.
Drive is not write protected. Default is no WP jumper installed.
Parity checking and parity error reporting by the drive is enabled. Default is PE jumper installed.
Drive does not report result of parity checking to host.
TE
On
Off
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J2
Jumper
Installation Jumper Function Description
(ST12400W only)
With the jumper installed, the On-board (non-removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper installed.
Terminator circuits not connected to I/O lines.
TP TP
Off
On
Off
On
Off
Off
On
On
No terminator power is connected to drive terminators or SCSI bus I/O pin 26.
Drive supplies its own terminator power only. Jumper on this position is factory default.
Drive supplies power to I/O pin 26 of SCSI bus; none to internal terminators. When drives have differential I/O circuits, a jumper on the right TP position may be needed to power external terminators (see system documentation). The ST12400WD drive has differential
I/O circuits which have no terminator circuits on the drive. The ST12400WC drive has no provisions for terminators and no provisions for terminator power in the 80 pin I/O connector.
The TP jumpers do not apply to model ST12400WC.
Drive supplies terminator power to itself (internal connection) and to I/O pin 26 of SCSI bus.
This is a legal jumper setting.
TP Position A
On
Off
This horizontally positioned jumper across the two TP positions nearest PCB edge, connects terminator power from SCSI bus I/O pin 26 to the drive's internal terminators (for
Model ST12400W only).
See above explanations for TP jumpers.
J1-Auxiliary, J6
Jumper
Installation Jumper Function Description
A3,A2,A1,A0 Drive ID on SCSI Bus (J1-auxiliary or J6 may be used as the ID circuits are wired in parallel).
The drive ID is binary coded positionwise i.e., jumper in position A3 is drive ID 8, A2 is drive
ID 4, position A1 is ID 2, position A0 is ID 1 and no jumpers is ID 0. Default is ID = 0. Both J1auxiliary and J6 should not be used at the same time, because at some future time when the
ID is changed the user could fail to configure both J1-auxiliary and J6 the same. Model
ST12400WC does not have J1-auxiliary.
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SSP Used only as a cable connection for the reference index signal (REFIND+) (J1-6A and J6
Pin 6, bottom) for sync spindle feature. J1-10A or J6-10 provides ground. See paragraphs
10.2, 5.7 for description of synchronized spindle operation. When no cable is connected, no jumpers should be installed. Factory default is no jumper installed. If a jumper is installed between pins 5 and 6 it will erroneously enable Drive ID bit A2.
BUSY LED
10.2
See Note [4]
Synchronized spindles interface
The Synchronized Spindles Interface (SSI) allows several drives operating from the same host to operate their spindles at a synchronized rotational rate. Details of the electrical and physical interfaces follow in paragraphs 10.2.1 and 10.2.1.2 and 10.2.1.3. The system operation is described in paragraph 5.7. Spindle synchronization typically works effectively only if all drives connected to the REFIND+ signal are identical in make and model.
10.2.1
Electrical description
The electrical interface consists of one digital TTL reference index signal and ground. The reference index signal (REFIND+) is an output if the drive is configured as a master and is an input otherwise. The reference index signal is connected from drive to drive in a daisychain fashion as shown in Figure 5.7-1.
10.2.1.1
Drivers and receivers
Figure 10.2.1-1 shows a diagram of the driver/receiver circuit. The driver circuits have the following electrical specifications.
Negated (False): 0.0 V to +0.4 V @ I = - 48 mA (max)
Asserted (True): +2.24 V to +5.25V@ I = +250 µA
Main PCB
Driver
+5V
2K Ohm [2]
Receiver
REFIND +
GND
J1-37 [1]
J6-6 or J1-6A
J6-10 or J1-10A
J1-47 [1]
[1] This connection exists only on the ST12400WC model.
[2] See paragraph 10.2.1.2
Figure 10.2.1-1. SCSI reference index signal driver/receiver combination
40 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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10.2.1.2
Termination
The reference index signal (REFIND+) is terminated with a 2 K ohm resistor. Each drive has a termination resistor located on the Main PCB. The terminator resistor is not removable and is always in the circuit.
10.2.1.3
Physical interface
The dimensions of the connectors (J1-auxiliary and J6) mounted on the drive PCB to interconnect the drives is shown in Figure 10.2.1-2a. They are 12 pin, 6 jumper position gold header type connectors. Pins 6 and 10 are used for connecting the Reference Index signal from drive to drive, as shown in Figure 10.2.1-2a. Pin 6 is REFIND+ and Pin 10 is ground. Either J1-auxiliary or J6 may be used. On "WC" models REFIND+ is J6-6 and on J1-37.
.485 max
.020 +/- .001
(square)
.157
+/- .010
.0787 (2mm) typ [1] .048 min
.033 +/- .004
.0787
(2mm) typ
[1] .157
+/- .010
.394 +/- .010
.236 max .090
-.128
Figure 10.2.1-2a. Configuration select header specification for J6. (Connector at front end of PCB)
Position 1
J1-Auxiliary
Position 1A [1] Position 1P
SCSI I/O Connector J1 GND
4P 3P 2P
J1-DC Power
1P
REFIND+
Figure 10.2.1-2b. Configuration select header for J1-auxiliary. (Connector at rear of model
ST12400W/WD PCB)
[1] J1-auxiliary pins are on 0.0787 inch (2 mm) centers as shown in Figure 10.2.1-2a for J6.
10.3
Grounding
Signal ground (PCB) and HDA ground are connected together in the ST12400 wide drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and
PCB with no electrically isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCB ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mounting the drive in the host equipment.
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11.0
Interface requirements
11.1
General description
This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements/implementation is described in the Seagate SCSI Interface Product Manual,
P/N 77738479. This section has tables that give the ST12400W/WD/WC Family drives versions of the SCSI implementation described in the 77738479 document.
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11.2
SCSI interface messages supported
Table 11.2-1 following lists the messages supported by the SCSI-1, SCSI-2 and SCSI-3 modes of the ST12400
Wide Family drives.
Table 11.2-1. SCSI messages supported by ST12400 wide family drives
Msg
Code
Supported by:
SCSI-1 SCSI-2/SCSI-3 Message Name
21h
22h
20h
10h
03h
02h
[1]
11h
[1]
01h [1]
06h
12h
13h
0Dh
0Ch
0Eh
00h
04h
80h-FFh
23h
0Fh
05h
0Ah
0Bh
09h
07h
[1]
08h
Y
Y
N
N
Y
Y
N
Y
Y
Y
N
N
Y
N
N
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
Y
Y
N
Y
Y
Y
Y
N
Y
Y
Y
N
Y
Extended messages
Abort
Continue I/O process
Target transfer disable
Abort tag
Bus device reset
Clear queue
Command complete
Disconnect
Identify
Ignore wide residue (two bytes)
Initiate recovery
Initiator detected error
Linked command complete [2]
Linked command complete with flag [2]
Message parity error
Message reject
Modify data pointer
No operation
Queue tag messages (two bytes)
Head of queue tag
Ordered queue tag
Simple queue tag
Release recovery
Restore pointers
Save data pointer
Synchronous data transfer req.
Terminate I/O process
Wide data transfer request
[1] Extended messages (see P/N 77738479 SCSI-2/SCSI-3 Interface Product Manual).
[2] Customer Unique
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11.3
SCSI interface commands supported
Table 11.3-1 following lists the SCSI interface commands that are supported in the SCSI-1, SCSI-2 and
SCSI-3 modes of the drive. Hawk 2 Family (Wide bus) drives can be changed back and forth between SCSI-
1 and SCSI-2 modes using the Change Definition Command. OEM standard drives are shipped set to operate in SCSI-2 mode.
Table 11.3-1. Commands supported by ST12400 wide family drives
Com’d
Code
00h
01h
03h
04h
07h
08h
0Ah
0Bh
12h
15h
16h
17h
18h
1Ah
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
N
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
N
Y
Supported by:
SCSI-1 SCSI-2/SCSI-3
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Command Name
Test unit ready
Rezero unit
Request sense
Extended sense
Field pointer bytes
Actual retry count bytes
Deferred error supported
Format unit [1]
Reassign blocks
Read
Write
Seek
Inquiry
Vital product data page
Unit serial number page
Implemented operating def. page
Firmware numbers page
Date code page
Jumper settings page
Mode select (same pages as mode sense command, see below)
Reserve
3rd parity reserve
Extent reservation
Release
Copy
Mode sense
Unit attention page (00h)
Byte 2 bit 4 (unit attn bit)
Byte 2 bit 5 (DEID bit
Error recovery page (01h)
Disconnect/reconnect Control page (02h)
Format page (03h)
Rigid disc drive geometry page (04h)
Verify error recovery page (07h)
Caching parameters page (08h)
Control mode page (0Ah)
Notch and Partition Page (0C) (Media Zones)
[1] ST12400 wide family can format to any even number of bytes per sector from 180 to 4096.
44 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
_____________________________________________________________________________________ continued from previous page
Com’d
Code
1Bh
1Ch
1Dh
3Bh
3Ch
3Eh
3Fh
40h
41h
42-4Bh
4Ch
4Dh
4E-54
55h
56-59
5Ah
5B-5F
60-BFh
C0-DFh
EO-FFh
32h
33h
34h
35h
36h
37h
39h
3Ah
25h
28h
2Ah
2Bh
2Eh
2Fh
30h
31h
Supported by:
SCSI-1 SCSI-2/SCSI-3
Y
N
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
Y
N
N
N
N
N
N
Y
N
Y
Y
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
N
N
N
N
N
N
N
Y
N
Y
Y
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Command Name
Start unit/stop unit (spindle ceases rotating)
Receive diagnostic results
Supported diagnostics pages
Translate page
Send diagnostics page
Supported diagnostics pages
Translate page
Read capacity
Read extended
Write extended
Seek extended
Write and verify
Verify
Search data high
Search data equal
Search data low
Set limits
Prefetch
Synchronize cache
Lock-unlock-cache
Read defect data
Compare
Copy and verify
Write buffer
Read buffer
Read long
Write long
Change definition
Write same
Not used
Log select
Log sense
Not used
Mode select (10)
Not used
Mode sense (10)
Not used
Not used
Not used
Not used
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 45
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11.3.1
Inquiry data
11.3.1.1
Standard Inquiry data
Table 11.3.1-1 following lists the Inquiry command data that the drive should return to the initiator per the format given in the SCSI-2/SCSI-3 Interface Product Manual (P/N 77738479).
BYTES
Table 11.3.1-1. ST12400ND wide family drive standard inquiry data
DATA (HEX)
0-15
16-31
32-47
48-63
64-79
80-95
96-111
112-127
128-143
144-148
00 00 ** *** 8F 00 ( ) ( ) 53 45 41 47 41 54 45 20 VENDOR ID
53 54 [31] [32] [34] [30] [30] [57] [44] 20 20 20 20 20 20 20 PRODUCT ID
R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 31* *COPYRIGHT
39* 39* 32* 20 53 65 61 67 61 74 65 20 41 6C 6C 20 NOTICE
72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20
D# D# D# D#
*Copyright Year - changes with actual year.
Notes.
**
***
( )
R#
S#
D#
[ ]
01 means SCSI-1 implemented;
02 means SCSI-2 implemented. Hawk 2 Family (Wide bus) drives can be changed between these two configurations. Default is 02.
01 means response data is in SCSI-1 format and has compatibility with Common Command Set data.
02 means response data is in SCSI-2 format. The drive can be changed between these two configurations. Default is 02. Though the drive supports some "SCSI-3" features, there are no provisions to indicate this in the Inquiry response data.
Inquiry data reports 01 32 if 16 bit wide address and data bus is used; 00 12 if 8 bit wide address and data bus is used.
Four ASCII digits representing the last four digits of the product Firmware Release number. This information is also given in the Vital Product Data page C0h, together with servo RAM and ROM release numbers.
Eight ASCII digits representing the eight digits of the product serial number.
Four ASCII digits representing the firmware distribution diskette serial number.
Bytes 18 through 24 will reflect model of drive. Shown here are hex values for ASCII codes representing “ST12400WD”. Byte 24 is 43 for model ST12400WC.
11.3.1.2
Inquiry Vital Product data
Instead of the standard Inquiry data shown in Table 11.3.1-1, the initiator can request several Vital Product
Data pages by setting the Inquiry command EVDP bit to one. The SCSI-2/SCSI-3, Version 2 Interface Product Manual P/N 77738479, Section 5.1.1.3.1 lists the Vital Product Data pages supported and describes their formats. A separate Inquiry command must be sent to the drive for each Vital Product Data page the initiator wants the drive to send back.
46 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.3.2
Mode Sense data
The Mode Sense command provides a means for the drive to report its operating parameters to the initiator.
The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Changeable values.
Default values are hard coded in the drive firmware that is stored in flash E-PROM nonvolatile memory on the drive PCB. Default values can be changed only by downloading new firmware into the flash E-PROM. An initiator can request and receive from the drive a list of Default values and use those in a Mode Select command to set up new Current and Saved values.
Saved values are stored on the disk media using a Mode Select command. Only parameter values that are allowed to be changed can be changed by this method. See “Changeable values” defined below. Parameters in the Saved values list that are not changeable by the Mode Select command get their values from the
Default values storage.
Current values are volatile values currently being used by the drive to control its operation. A Mode Select command can be used to change these values (only those that are changeable). Originally, they are installed from Saved or Default values after a power on reset, hard reset, or Bus Device Reset message.
Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the Current values and Saved values can be changed by a Mode Select command. A “one” allows a change to a corresponding bit; a “zero” allows no change. For example, in Table 11.3.2-1a refer to Mode page 01, in the first row entitled
“CHG”. These are hex numbers representing the changeable values for Mode page 01. Note in columns 1 and 2 (bytes 00 and 01), there is 00h, which indicates that in bytes 00 and 01 none of the bits are changeable.
Note also that bytes 04, 05, 06 and 07 are not changeable, because those fields are all zeros. In bytes 02, hex value FF equates to the binary pattern 1111 1111. If there were a zero in any bit position in the field, it would mean that bit is not changeable. However, bits 7 - 0 are changeable, because those bits are all ones.
In this particular case, it indicates 8 error recovery control bits are all changeable. FF in column 4 indicates all bits in byte 3 are changeable.
The Changeable values list can only be changed by downloading new firmware into the flash E-PROM.
On drives requiring unique Saved values, the required unique Saved values are stored into the Saved values storage location on the media prior to shipping the drive. Some drives may have unique firmware with unique
Default values also.
On standard OEM drives the Saved values are taken from the Default values list and stored into the Saved values storage location on the media prior to shipping.
When a drive is powered up, it takes Saved values from the media and stores them to the Current values storage in volatile memory. It is not possible to change the Current values (or the saved values) with a Mode
Select command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check
Condition” status being returned.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A* 47
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The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI-1, SCSI-2/SCSI-3 implementation (see SCSI Interface Product Manual, P/N
77738479).
DEFINITIONS:
DEF = Default value. Standard drives are shipped configured this way.
CHG = Changeable bits; indicates which current and saved values are changeable.
Table 11.3.2-1. Mode sense data, ST12400 wide default values
(SCSI-1 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode
Sense 63 00 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01 81 06 00 21 30 00 00 FF
CHG
01 00 00 EF FF 00 00 00 00
DEF
02 82 0A 80 80 00 0A 00 00 00 00 00 00
CHG
02 00 00 EF FF 00 00 00 00 00 00 00 00
DEF
03 83 16 00 13 00 0C 00 00 00 26 00 54 02 00 00 01 00 0E 00 16 40 00 00 00
CHG
03 00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 12 00 0A 0A 13 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CHG
04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 00 BD FF FF FF FF FF FF FF 00 00 20 FF FF FF 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 00 36 FF
48 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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Table 11.3.2-2. Mode sense data, ST12400 wide default values
(SCSI-2/SCSI-3 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode 9F 00 00 08
Sense 00 00 00 00 00 00 02 00
Data
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01 81 0A 00 21 30 00 00 00 16 00 FF FF
CHG
01 00 00 EF FF 00 00 00 00 FF 00 00 00
DEF
02 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00
CHG
02 00 00 FF FF 00 00 00 00 00 00 00 00 80 00 00 00
DEF
03 83 16 00 13 00 0C 00 00 00 26 00 54 02 00 00 01 00 0D 00 16 40 00 00 00
CHG
03 00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 16 00 0A 3D 13 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
CHG
04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 00 00 00 00
DEF
07 87 0A 00 21 30 00 00 00 00 00 FF FF
CHG
07 00 00 0F FF 00 00 00 00 00 00 00 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
0A 8A 0A 00 10 00 00 00 00 00 00 00 00
CHG
0A 00 00 01 01 07 00 00 00 00 00 00 00
DEF
0C 8C 16 80 00 00 17 00 00 00 00 00 00 00 0A 3A 12 00 00 00 00 00 00 10 00
CHG
0C 00 00 D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 00 36 00
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 49
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11.4
SCSI Bus Conditions and Miscellaneous Features Supported
Asynchronous SCSI bus conditions supported by the drive are listed in Table 11.4-1. These conditions cause the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating features supported are also listed here.
Table 11.4-1. SCSI bus conditions and other misc. features
Condition/Feature Supported by:
N
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
SCSI-1 SCSI-2/SCSI-3
Y Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
N
Y
Y
Y
N
N
[1]
Y
N
N
[1]
SCSI-1 SCSI-2/SCSI-3
Y Y
Y
Y
Y
Y
Y
[1]
Y
Y
[1]
Y
Conditions or Feature
Attention Condition
Reset Condition
Contingent Allegiance Condition
Asynchronous Event Notification
Arbitrating System
Disconnect/Reconnect
Asynchronous Data Transfer
Synchronous Data Transfer
Synchronized (locked) Spindle Operation
Differential Interface Circuits available
Segmented Caching
Zero Latency Read
Queue tagging (up to 64 Que tags supported)
Deferred Error Handling
Parameter Rounding
Reporting actual retry count in Extended Sense bytes
15, 16 and 17.
Adaptive Caching (available only on some drives)
SMP = 1 in Mode Select command needed to save
RPL and Rotational Offset bytes (in Table 5.2.1-25
of Vol. II).
Immediate status for Start/Stop command
Immediate status for Format unit and Synchronize Cache commands
Format Progress Indication
Flag and Link bits in control byte supported
Status Supported
Good
Check Condition
Condition Met/Good
Busy
Intermediate/Good
Intermediate/Condition Met/Good
Y
Y
Y
Y
Reservation Conflict
Queue Full
Notes:
[1] Option supported only if customer requests.
50 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.5
11.5.1
Synchronous data transfer
Synchronous data transfer periods supported
Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer period to be used by the drive and the initiator is established by an exchange of messages during the Message Phase of operation. See the section on message protocol in the SCSI Interface manual.*
M (Decimal)
25
31
37
50
62
75
87
100
Table 11.5-1. Synchronous data transfer periods
Transfer Period (M times 4 nanoseconds)
100
125
150
200
250
300
350
400
11.5.2
REQ/ACK offset
The maximum REQ/ACK offset supported by the ST12400 wide family is 15 (0Fh).
__________
*SCSI Interface Product Manual, P/N 77738479
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 51
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11.6
Physical interface
Figure 11.6-1 shows the locations of the physical interface components for the drive. Shown are the locations of the D.C. power connector, the SCSI interface connector, the I/O line terminators, and the drive select and option select header.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the SCSI operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual,
P/N 77738479.
J1
Pin 1
Pin
1P
2P
3P
4P
Power
+12V
+12V ret
+ 5V ret
+ 5V
J1-Auxiliary
Pin 1A
J1-DC Power
4P 3P 2P 1P
PCB
J1-Auxiliary
Pin 1A
J1
Pin 1
Pin 1P
68 Pin
SCSI I/O
Connector
J1-DC Power
J2
J6
Figure 11.6-1a. ST12400W/WD family drive physical interface
J2
80 Pin
SCSI I/O
Connector
Pin 1
J6
Figure 11.6-1b. Model ST12400WC physical interface (80 pin I/O and DC power connector)
52 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.6.1
DC cable and connector
The model ST12400W/WD drive receives DC power through a 4 pin connector mounted at the rear of the main PCB (see Figure 11.6.3-1a). Recommended part numbers of the mating connector are listed below, but equivalent parts may be used (see Table 11.6.1-1).
Type of cable
14 AWG
Table 11.6.1-1. Mating connector parts
Connector
AMP 1-480424-0
Contacts (20-14 AWG)
AMP 60619-4 (Loose Piece)
AMP 61117-4 (Strip)
The model ST12400WC requires no extra DC power cable since both DC power and SCSI I/O signals are all in the single 80 pin connector. See Table 11.6.3-1b for pin assignments.
11.6.2
Physical characteristics
This section defines the connectors, cables, signals, terminators and bus timing needed to implement SCSI.
11.6.2.1
Physical description
The model W and WD drives may be daisychained together or with other compatible SCSI devices using a common cable. Both ends of the cable must be terminated. Model ST12400 wide drives do not have onboard terminator circuits. The ST12400WD drive implements differential drivers and receivers. The model
ST12400W/WC drive implements single ended drivers and receivers. All signals are common between all
SCSI devices. The drive may be daisychained only with SCSI devices having the same type drivers and receivers. Devices having single ended interface circuits cannot be on the same daisychain with devices having differential interface circuit. A maximum of 16 SCSI devices (including the Host) may be daisychained together. The SCSI Devices at both ends of the daisychain are to be terminated. Intermediate SCSI devices shall not be terminated (see Figure 11.6.3-1). Remove or disable (whichever is applicable) the terminators.
Do not remove the terminator power source selector jumper TP ( See Figure 10.1-1 and accompanying notes).
"NC" model drives plug into PCB or bulkhead connectors in the Host. They may be connected in a daisychain by the host backplane wiring or PCB circuit runs that have adequate DC current carrying capacity to support the number of drives plugged into the PCB or bulkhead connectors. A single 80 pin I/O connector cannot support the DC current needs of several drives, so no daisy-chain cables should be used. A single drive connected via a cable to a host 80 pin I/O connector is not recommended.
11.6.2.2
Cable requirements ("W" and "WD" models only)
11.6.2.2.1
Single ended I/O circuits ("W" models)
The maximum total cable length for use with "W" model drives (single ended I/O driver and receiver circuits) shall be 6 metres (19.7 ft.) when operating at line data transfer rates of 5 MBytes/sec or less, and 3 metres
(9.85 ft.) when operating at transfer rates greater than 5 Mbytes/sec (FAST SCSI). A stub length of no more than 0.1 metre (0.33 ft.) is allowed off the mainline interconnection with any connected equipment. An ideal impedance match with cable terminators implies a cable characteristic impedance of 132 ohms (see 11.6.2.2.3).
Model ST12400W/WC single ended I/O pin assignments are shown in Table 11.6.3-1a.
11.6.2.2.2
Differential I/O circuits ("WD" models)
The maximum total cable length for use with drives having differential I/O drivers and receiver circuits shall be 25 metres (82 ft.). A stub length of no more than 0.2 metre (0.66 ft.) is allowed off the mainline interconnection with any connected equipment. An ideal impedance match with cable terminators implies a cable characteristic impedance of 122 ohms. Model ST12400WD differential I/O pin assignments are shown in Table
11.6.3-1b.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 53
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11.6.2.2.3
General cable characteristics
In general, cables having the characteristic impedance’s given above are not available; however, impedance’s that are somewhat lower are satisfactory. A characteristic impedance of 100 ohm ±10% is recommended for unshielded flat or twisted pair ribbon cable. However, most available cables have a somewhat lower characteristic impedance. To minimize discontinuities and signal reflections, cables of different impedance’s should not be used in the same bus. Implementations may require tradeoffs in shielding effectiveness, cable length, the number of loads, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at
FAST SCSI transfer rates.
Cable for "W/WD" model drives
Only nonshielded cable is applicable. A 68 conductor flat cable or two, 34 conductor cables shall be used.
Conductors should be on 50 (1.27 mm) mil centers to be used with connector listed in 11.6.3.1. A minimum conductor size of 28 AWG should be used to minimize noise effects.
Suggested nonshielded flat cable part numbers are:
Flat cable - 35M-3365-68 Twisted pair - Spectra Twist in flat 455-248-68
Equivalent parts may be used.
Cables for "WC" drive models
The 80 pin connector option is intended for use on drives that plug directly into a wall or bracket mounted connector in the host equipment. Cable mounted connectors would not be used in such a case. Installations with cable mounted connectors are not recommended.
11.6.3
Connector requirements
11.6.3.1
Mating connectors for model ST12400W/WD
The nonshielded cable connector shall be a 68 conductor connector consisting of two rows of 34 male contacts with adjacent contacts 1.27 mm (0.050 inch) apart.
Recommended Mating Connector Part Numbers for above flat cable are:
Closed end
(for cable ends)
Open end
Amp Model 749925-5
Amplimite 88-5870-294-5
(50 mil conductor centers for 28 or 30 AWG wire) This connector can only be used on cable ends.
W/O Strain Relief, (25 mil conductor centers, 30 AWG wire).
Use either on cable ends or in cable middle section for daisychain installations.
The disc drive device connector is a nonshielded 68 conductor connector consisting of two rows of 34 female pins with adjacent pins 1.27 mm (0.050 inches) apart. The connector is keyed by means of its shape (see
Figure 11.6.3-1a).
54 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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*
T
SCSI Device
Host Adapter/Initiator * * *
1 thru 16
SCSI Devices
* *
Disc Drive or
Other SCSI
Device
* *
Disc Drive or
Other SCSI
Device
*
T
Disc Drive or
Other SCSI
Device
VIEW B
T indicates termination required
Total Interface cable length must not exceed that specified in paragraph 11.6.2. (Including host adapter/ initiator).
* Closed end type connector used.
** Open end type (in-line application) connector used
*** Host need not be on the end of the daisychain. Another device can be on the end with the terminator. The host can be anywhere in the daisychain, having no terminator.
Figure 11.6.3.-1. Interface cabling
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 55
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Position 1 Position 1 Position 1
.100
(2.54)
.218
(5.54)
.050
(1.27)
1.816
(46.13) Position 1
.42
(10.67) ref
Position 1
1.650
(41.91)
.0787
(2.00)
4
.60
(15.24)
Position 1
3 2 1
.20
(5.08) typ
.065
(1.65) x 45° chamfer typ
.315 ± .010
(8.00)
.834 ± .010
(21.18)
.083
+.001
–.002
(2.1) dia
Trifurcated Pins
(4 places)
3.650
(92.71)
HDA
.079
(2.00)
.388
(9.86
.650
(16.51)
.750
(19.05)
.142
(3.61)
PCB ref
.054
(1.37) ref
Figure 11.6.3-1a. Non shielded SCSI device connector for model ST12400W/WD
11.6.3.2
Mating connectors for "WC" models
The non-shielded connector shall be an 80 conductor connector consisting of two rows of 40 contacts with adjacent contacts 50 mils (1.27 mm) apart. The connector is keyed by its shape. The characteristics of the drive's PCB mounted connector are shown in Figure 11.6.3-1b.
11.6.3.3
J2 Jumper plug part number
Option select header connector J2 on the PCB (see Figure 10.1-1) uses an unusual type of jumper, its part number is given here for reference:
Molex 52747-0211 (Seagate P/N 77670952).
56 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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Recommended PCB or bulkhead mounted connectors are:
Straight-in connector (most commonly used): Right angle to PCB connector:
Seagate P/N:
Amp US P/N:
77678703
2-557103-1
Amp Japan P/N: 5-175475-9
Seagate P/N:
Amp US P/N:
77678559
2-557101-1
Amp Japan P/N: 5-175474-9
*
Side View
7.00
(.276)
2.70
(.106)
Section X–X
1.32
(.052)
1.52
(.060)
57.87
(2.278)
[
0
–0.15
+ .000
– .006
[
0.15
M Y M
–Y–
12.70
(.500)
Front View
Pin 1 *
62.15
(2.447)
± 0.15
(± .005)
0.15
M Y M
Housing
X
Insert cable connector here
Top View
PCB Contacts
0.50
(.020)
0.3
(.012) M Y M
1.27
(.05)
Typ
Pin 1
X
Back View
* Contacts are recessed along the center strip (see side view).
Figure 11.6.3-1b. Non-shielded 80 pin I/O and DC power connector for model ST12400WC
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 57
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Table 11.6.3-1a. ST12400WD differential cable pin assignments (nonshielded connector)
.
Note. The minus sign next to the signals indicates asserted state is the low voltage of the two levels
used for logic signals
Connector
Signal
Cable
Contact
Connector
Conductor Contract Signal
Name* Number Number Number Name
TermPwr
TermPwr
Reserved
+ATN
Ground
+BSY
+ACK
+RST
+MSG
+SEL
+C/D
+REQ
+I/O
Ground
+DB(8)
+DB(9)
+DB(10)
+DB(11)
+DB(12)
+DB(13)
+DB(14)
+DB(15)
+DB(P1)
Ground
+DB(0)
+DB(1)
+DB(2)
+DB(3)
+DB(4)
+DB(5)
+DB(6)
+DB(7)
+DB(P)
DIFFSENS
29
30
31
32
25
26
27
28
33
34
21
22
23
24
17
18
19
20
13
14
15
16
9
10
11
12
5
6
7
8
1
2
3
4
57
59
61
63
49
51
53
55
65
67
41
43
45
47
33
35
37
39
25
27
29
31
17
19
21
23
9
11
13
15
1
3
5
7
58
60
62
64
50
52
54
56
66
68
42
44
46
48
34
36
38
40
26
28
30
32
18
20
22
24
10
12
14
16
2
4
6
8
63
64
65
66
59
60
61
62
67
68
55
56
57
58
51
52
53
54
47
48
49
50
43
44
45
46
39
40
41
42
35
36
37
38
TermPwr
TermPwr
Reserved
-ATN
Ground
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
Ground
-DB(8)
-DB(9)
-DB(10)
-DB(11)
-DB(12)
-DB(13)
-DB(14)
-DB(15)
-DB(P1)
Ground
-DB(0)
-DB(1)
-DB(2)
-DB(3)
-DB(4)
-DB(5)
-DB(6)
-DB(7)
-DB(P)
Ground
Notes.1.The conductor number refers to the conductor position when using 0.025- inch centerline flat ribbon cable. Other cable types may be used to implement equivalent contact assignments.
* See paragraph 11.6.4.1 for detailed electrical characteristics of these differential signals.
58 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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Table 11.6.3-1b. ST12400WC single ended, 80 pin cable pin assignments (Non-shielded connector)
Signal Pin Number Signal Pin Number
-DB3
-DB2
-DB1
-DB0
-DP1
-D15
-D14
-D13
-ACK
-BSY
-ATN
-DBP
-DB7
-DB6
-DB5
-DB4
-D9
-D8
-IO
-REQ
-CO
-SEL
-MSG
-RST
+12 V
+12 V
+12 V
+12 V
NC
NC
-D11
-D10
-D12
+5 V
+5 V
+5 V
SYNC
MTRON
SCSIAO
SCSIA2
[1]
[3]
[5]
[5]
29
30
31
32
25
26
27
28
21
22
23
24
17
18
19
20
37
38
39
40
33
34
35
36
13
14
15
16
9
10
11
12
7
8
5
6
3
4
1
2
12 V GND
12 V GND
12 V GND
12 V GND
NC
NC
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
5 V GND
5 V GND
5 V GND
LEDC
DLYDST
SCSIA1
SCSIA3
[2]
[4]
[5]
[5]
Notes: Singals [1] thru [5] are used in place of installing jumpers and cables on option select connectors J2,
J5 and J6. See also notes following Figure 10.1-1.
69
70
71
72
65
66
67
68
61
62
63
64
57
58
59
60
77
78
79
80
73
74
75
76
53
54
55
56
49
50
51
52
45
46
47
48
41
42
43
44
[1] Synchronous spindle synchronizing signal, generated by either host or drive.
[2] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator.
[3] Asserted by host to enable Motor Start option (enables starting motor via SCSI bus command).
[4] Asserted by host to enable Delayed Motor Start option (motor starts at power on or after a delay of 12 seconds times drive ID). This and [3] above are mutually exclusive options.
[5] Binary code on A3, A2, A1 and A0 asserted by host to set-up SCSI bus ID in drive.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 59
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Note.
The minus sign next to the signals indicates asserted state is the low voltage of the two levels used for logic signals.
Table 11.6.3-1c. ST12400W single ended cable pin assignments (nonshielded connector)
Ground
Ground
TermPwr
TermPwr
Reserved
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Signal
Name*
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
26
27
28
29
22
23
24
25
30
31
32
33
34
18
19
20
21
14
15
16
17
10
11
12
13
8
9
6
7
4
5
2
3
Connector
Contact
Number
1
19
21
23
25
11
13
15
17
7
9
3
5
Cable
Conductor
Number
1 2
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
Connector
Contact
Number
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
**Notes. 1.
See paragraph 11.6.4.1 for detailed electrical characterics of these signals.
2.
The conductor number refers to the conductor position when using 0.025-inch certerline flat ribbon cable. Other cables types may be used to implement equivalent contact assignments.
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
Ground
Ground
TermPwr
TermPwr
Reserved
Ground
-ATN
Ground
-DB(8)
-DB(9)
-DB(10)
-DB(11)
Signal
Name
-DB(12)
-DB(13)
-DB(14)
-DB(15)
-DB(P1)
-DB(0)
-DB(1)
-DB(2)
-DB(3)
-DB(4)
-DB(5)
-DB(6)
-DB(7)
-DB(P)
60 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.6.4
Electrical description
The ST12400W/WC models use single ended interface signals. These signals must be terminated with 110 ohm active termination circuits at each end of the total cable. ST12400WC drives have no provisions for terminators on the PCB. On model ST12400WC some method of external termination must be provided by the user, systems integrator or the host equipment manufacturer. On ST12400W drives terminator power can be supplied from the drive to the I/O connector by the drive by properly positioning the TP jumper plug and the J2 option select header. See Figure 10.1-1a. Single Ended circuits use open collector or three state drivers. See Figure 11.6.4-1a and 11.6-1b.
The model ST12400WD uses differential interface signals and each of these must be terminated at each end of the total cable with 330 ohms to +5 V and 330 ohms to ground with 150 ohms between each differential pair. All I/O circuits are open collector, three state drivers. See Figure 11.6.4-1b for circuit drawing. ST12400WD drives have no provisions for adding terminators on the PCB. Some method of external termination must be provided (where needed) by the user, systems integrator or host equipment manufacturer. The ST12400WD model drive can furnish terminator power to the SCSI I/O cable by properly positioning jumper plug TP. See
Figure 10.1-1a.
11.6.4.1
Single ended drivers/receivers
Typical single ended driver and receiver circuits for the ST12400W/WC is shown in Figure 11.6.4-1a. Terminator circuits shown (Note [1]) are to be enabled ("W" model) or installed externally only when the disc drive is first or last in the daisychain.
Transmitter characteristics
Single ended drives use an ANSI SCSI compatible open collector single ended driver. This driver is capable of sinking a current of 48 mA with a low level output voltage of 0.4 volt.
Receiver characteristics
Single ended drives use an ANSI SCSI single ended receiver with hysteresis gate or equivalent as a line receiver.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 61
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Line Driver
Transmitter
(or transceiver)
(4)
TP
(1)
110
Ohm
Flat
Cable
Pair
Line Receiver
(4)
TP
Receiver
(1)
110
Ohm
(3)
(2) (2)
[1] Part of active terminator circuits. Termination is required when the drive is first or last in the daisychain.
Terminators and a place to plug them must be provided by the user, systems integrator or systems designer.
[2] ANSI SCSI compatible circuits
[3] Total interface cable length should not exceed that specified in paragraph 11.6.2.2.1.
[4] Arrangements for connecting terminator power to the terminators must be made by the systems designer. The ST12400WC drive cannot furnish terminator power because the 80 pin I/O connector has no pins devoted to terminator power.
[5] Interface signals levels and logical sense at the drive I/O connector are defined as follows:
Logic Level
Negated (0)
Asserted (1)
Driver Output
>2.5 V: <5.25 V
<0.4 V: >0.0 V
Receiver Input
>2.0 V: <5.25 V
<0.8 V: >0.0 V
The difference in the voltages between input and output signals is due to the losses in the cable.
Figure 11.6.4-1a. Typical single ended transmitters and receivers
62 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.6.4.2
Differential drivers/receivers
Typical differential driver and receiver circuits used by the model ST12400WD are shown in Figure 11.6.4-1.
The drive has no provisions for terminator circuits on the drives.
Differential signals
All differential interface signals consist of two lines denoted +SIGNAL and -SIGNAL. A signal is true when
+SIGNAL is more positive than -SIGNAL, and a signal is false when -SIGNAL is more positive than +SIG-
NAL. All assigned signals shall be terminated at each end of the cable as shown in Figure 11.6.4-1. Drive user, systems integrator or OEM manufacturer must provide some external means of termination. Terminator power can be supplied by the drive to the I/O cable by properly positioning a jumper plug. See Figure 10.1-1.
Output characteristics
Each signal driven by differential interface drives shall have the following output characteristics when measured at the disc drive SCSI connector:
Low-level output voltage* = 2.0 V maximum at Low-level output current = 55 milliamps.
High-level output voltage* = 3.0 V minimum at High-level output current = -55 milliamps
Differential voltage = 1.0 V minimum with common-mode voltage ranges from -7 V dc to +12 V dc.
* These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference.
The output characteristics shall additionally conform to EIA RS-485-1983.
Input characteristics
Each signal received by differential interface drives shall have the following input characteristics when measured at the disc drive SCSI connector:
Input current on either input = +2.0 milliamps maximum (includes both receivers and passive drivers).
This requirement shall be met with the input voltage varying between -7 V dc and +12 V dc, with power on or off, and with the hysteresis equaling 35 mv, minimum.
The input characteristics shall additionally conform to EIA RS-485-1983.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 63
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+5V
+5V
5.6K
Transmit/Receive
Enable (1)
DIFFSENS (6)
Transmit or
Receive
Signal (2)
TE
RE
LSI
XCVR
Disable
1
1
R 2
Term
Power
(5)
330
Ohm
(4)
150
Ohm
330
Ohm
(3) Twisted or Flat
Cable Pair
(7)
SCSI Device at Beginning of I/O Cable
(usually Host Adaptor/Initiator)
+5V
+5V
5.6K
Transmit/Receive
Enable (1)
DIFFSENS (6)
Transmit or
Receive
Signal (2)
TE
RE
LSI
XCVR
Disable
1
1
R 2
Term
Power
(5)
330
Ohm
(4)
150
Ohm
330
Ohm
(7)
SCSI Device at End of I/O Cable
(Drive/Target)
Notes.
[1] Positive Logic Enables Transmitter (+5 V = Asserted)
Negative Logic Enables Receivers (0 V = Asserted)
[2] Negative Logic Signal (0 V = Asserted)
[3] Total interface cable length should not exceed value given in section 11.6.2.1 from first SCSI device at beginning to end of daisychain. See section 11.6.4.1 for signal characteristics.
[4] I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must be provided external to the drive by user, systems integrator or systems designer where needed. The drive has no terminators and there are no provisions on the drive for terminator installation.
[5] Arrangements for connecting terminator power to the terminators must be made by the systems designer. As a help, drive +5 V power is made available on model ST12400WD on SCSI bus pins 17, 18, 51 and 52 for powering external terminators if the drive option select header jumper TP (Figure 10.1-1a) is installed in the proper position.
[6] SCSI I/O line (pin 16) disables I/O circuits if single-ended cable is plugged in.
[7] SCSI I/O cable ground. See Table 11.6.3-1b.
Figure 11.6.4-1b. Typical differential I/O line transmitter/receiver and terminators
64 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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11.6.4.2
Terminator requirements
Drive I/O termination is not provided internally on ST12400WD or ST12400WC drives. Terminator circuits, must be provided in some manner external to the ST12400WD/WC drives by the user, systems integrator or
OEM manufacturer. It is highly recommended that ANSI SCSI-2 Standard's Alternative 2 termination (active termination) be used for single-ended ST12400W and ST12400WC applications, especially if the bus will be operated at transfer rates above 5 Mbytes/sec. The ST12400W provides on-board active termination that can be disabled by removal of the enable jumper TE (see Figure 10.1-1). Power for the external terminators may be taken from the drive (see paragraph 11.6.4.3) by installing a jumper plug on one of the J2-TP (see
Figure 10.1-1a). If the TP jumper is not installed terminator power must be supplied by some other source. All single initiator/single target (nondaisychain) applications require that the Initiator and disc drive be terminated. Daisychain applications require that only the units at each end of the daisychain be terminated. All other peripherals on the chain should not be terminated. (See Figure 11.6.3-1).
Note.
Where terminators are not required, remove external terminator modules or disable terminators on the model ST12400W by removing the TE jumper from header J2 (see Figure 10.1-1a). Removal of terminator power source selection jumper TP does not disconnect the terminators from the circuit.
Note.
ACTIVE TERMINATORS ARE HIGHLY RECOMMENDED FOR USE IN THE DAISYCHAIN AS DE-
SCRIBED ABOVE. ACTIVE AND PASSIVE TERMINATORS SHOULD NOT BE MIXED ON THE
SAME SCSI BUS.
11.6.4.3
Terminator power
The model ST12400W/WD drives may be configured to provide terminator power via pins 17, 18, 51 and 52 of the SCSI Bus, to supply power to the SCSI bus. See Figure 11.6.3-1 and 10.1-1. The drive can provide power both to external terminators at the drive end and to the SCSI Bus terminator power lines to provide power for terminators at the other end of the I/O cable.
SCSI devices providing terminator power (TERMPWR) shall have the following characteristics:
V TERM = 4.50 V to 5.25 V
800 mA min source drive capability
1.0 A maximum
The model ST12400WC drive cannot furnish terminator power, because no pins in the 80 pin I/O connector are devoted to terminator power.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 65
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11.7
Disc drive SCSI timing
Table 11.7-1. Disc drive SCSI timing
Description
Target Select Time (no Arbitration)
Target Select Time (with Arbitration)
Target Select to Command
Target Select to MSG Out
Identify MSG to Command
Command to Status
Command to Data (para. In)
Command to Data (para. Out)
Command to Data (Write to Data Buffer)
Command to Disconnect MSG
Disconnect MSG to Bus Free
Disconnect to Arbitration (for Reselect)
This measures disconnected CMD overhead.
Target win Arbitration (for Reselect)
Arbitration to Reselect
Reselect to Identify MSG In
Reselect Identify MSG to Status
Reselect Identify MSG to Data (media)
Data to Status
Status to Command Complete MSG
Command Complete MSG to Bus Free
Data to Save Data Pointer MSG
Save Data Pointer MSG to Disconnect
MSG
Command Byte Transfer
Next Command Byte Access
Next CDB Byte Access (Byte 2 of 6)
Next CDB Byte Access (Byte 3 of 6)
Next CDB Byte Access (Byte 4 of 6)
Next CDB Byte Access (Byte 5 of 6)
Next CDB Byte Access (Byte 6 of 6)
T06
T07
T08
T09
T10
T11
Waveform
Symbol [1]
T00
T01
T02
T03
T04
T05
T12
T13
T14
T15
T16
T17
T18
T19
T20
T21
T22
T23.6.2
T23.6.3
T23.6.4
T23.6.5
T23.6.6
Waveform
Table [1]
N/A
4.5-1,2
4.5-1
4.5-2
4.5-3
4.5-5
4.5-9
4.5-10
4.5-10
4.5-6
4.5-6,14
4.5-6
Typical Max
<1 µs <250 µs
2.34 µs
3.82 µs
2.44 µs
3.84 µs
1.62 µs
3.56 µs
1.66 µs
3.64 µs
Command Dependent
Command Dependent
Command Dependent
Command Dependent
Command Dependent
0.68 µs 0.78 µs
Command Dependent
4.5-14
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-7
4.5-7
4.5-7
4.5-8
4.5-11
4.5-15
4.5-5,8,15
4.5-5,8,15
4.5-14
3.0 µs
1.82 µs
1.52 µs
Command Dependent
Command Dependent
Command Dependent
1.04 µs
0.80 µs
5.00 µs
0.54 µs
0.11 µs
0.12 µs
0.13 µs
0.11 µs
0.85 µs
0.06 µs
0.64 µs
0.14 µs
0.14 us
0.14 µs
0.14 µs
66 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
_____________________________________________________________________________________ continued from previous page
Description
Waveform
Symbol [1]
Asynchronous Data Transfer Characteristics: (continued)
Next CDB Byte Access (Byte 2 of 10)
Next CDB Byte Access (Byte 3 of 10)
T23.10.2
T23.10.3
Next CDB Byte Access (Byte 4 of 10)
Next CDB Byte Access (Byte 5 of 10)
Next CDB Byte Access (Byte 6 of 10)
Next CDB Byte Access (Byte 7 of 10)
T23.10.4
T23.10.5
T23.10.6
T23.10.7
Next CDB Byte Access (Byte 8 of 10)
Next CDB Byte Access (Byte 9 of 10)
Next CDB Byte Access (Byte 10 of 10)
Data In Byte Transfer (parameter)
Data Out Byte Transfer (parameter)
Next Data In Byte Access (parameter)
Next Data Out Byte Access (parameter)
Data In Byte Transfer (media) [2]
Data Out Byte Transfer (media) [2]
Next Data In Byte access (media [2]
Next Data Out Byte access (media [2]
MSG IN Byte Transfer
T23.10.8
T23.10.9
T23.10.10
T24
T25
T26
T27
T28
T29
T30
T31
T32
MSG OUT Byte Transfer
STATUS Byte Transfer
T33
T34
Waveform
Table [1]
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-12
4.5-13
4.5-12
4.5-13
4.5-12
4.5-13
4.5-12
4.5-13
4.5-5,7
4.5-8,14,15
4.5-2
4.5-5,8
4.5-15
Typical
0.51 µs
0.13 µs
0.11 µs
0.12 µs
0.12 µs
0.11 µs
0.12 µs
0.11 µs
0.13 µs
0.10 µs
0.11 µs
0.04 µs
0.04 µs
0.10 µs
0.10 µs
Max.
0.60 µs
0.14 µs
0.14 µs
0.14 µs
0.14 µs
0.14 µs
0.14 µs
0.14 µs
0.14 µs
0.06 µs
0.06 µs
0.14 µs
0.14 µs
0.06 µs
0.06 µs
0.14 µs
0.14 µs
0.06 µs
0.06 µs
0.06 µs
Synchronous Data Transfer Characteristics:
Request Signal Transfer Period [3] various 800 ns
Notes.
[1] See SCSI-2 Interface Manual P/N 77738479 (called Volume II), section 4.5
[2] Maximum SCSI asynchronous interface transfer rate is given in section 5.3.
[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive is capable of setting periods as given in section 11.5. See also sections 3.1.5.2 and 3.5.3.2 of the SCSI-
2 Interface Product Manual (P/N 77738479) for a description of synchronous data transfer operation.
General timing diagrams for SCSI interface operation are shown in the SCSI-2 Interface Product Manual
P/N 77738479, Section 4.5. The specific timing values that apply to this drive are listed in Table 11.7-1.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 67
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12.0
Options
All options are incorporated or packaged at the manufacturing facility.
12.1
Front panel
The normal front panel available is black plastic. Other panel colors may be special ordered. Each panel has a single rectangular green LED indicator lens which, when glowing, indicates the drive is selected.
12.2
Single unit shipping pack
The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should specify this option.
68 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A
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13.0
Accessories
All accessories are designed for implementation by the customer.
13.1
Front panel kit
Same as 12.1 but includes all mounting hardware to support field installation.
13.2
Installation manual
This manual (P/N 77767465) provides basic information on the care and handling of Winchester disc peripherals in general. Some information needed when installing the drive is included to assist individuals not familiar with the product. It also includes basic information to assist in obtaining service for the drive.
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 69
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14.0
Seagate Technical Support services
Seagate Technology provides technical support literature and diagnostic utilities to Authorized Distributors.
Please contact your dealer for technical support and installation troubleshooting. Product Technical Support is available for all Seagate products by calling the SeaFAX, SeaFone, SeaTDD or SeaBOARD services.
These are toll calls.
SeaFAX: United States 408/438-2620 England 44-62-847-7080
You can use a Touch-Tone telephone to access Seagate’s automated FAX delivery system and select technical support information by return FAX. This service is available 24 hours a day, 7 days a week.
Seagate Technical Support FAX: 408/438-8137
You can FAX specific questions or comments to Seagate technical support specialists 24 hours daily. Responses are FAXed between 8:00 a.m. and 5:00 p.m. (Pacific time), Monday through Friday.
SeaFone: 408/438-8222
The enhanced phone system provides recorded technical information on selected Seagate products while you are on hold. Technical support specialists are available to answer questions from 8:00 AM to 5:00 PM
PST, Monday through Friday. Recordings are accessible 24 hours a day, 7 days a week.
SeaTDD: 408/438-5382
TDD is a Telecommunication Device for the Deaf where two people can communicate using a keyboard that is connected to the phone line. A TDD device is required to access this service. This service is available from
8:00 AM to 5:00 PM PST, Monday through Friday.
SeaBOARD:
The Seagate Technical Support Bulletin Board System (BBS) is available 24 hours a day, 7 days a week. A modem is required to access this service. (300–9600 baud, 8-N-1). This is a toll call.
With this service you can access:
•
Specifications and jumper configurations for all Seagate products.
•
Reprints of Seagate documentation.
•
A directory of information and helpful utilities that you can download to your own computer.
BBS
Location
Modem
Number
USA, Mexico, Latin America
England
France
Germany
Singapore
Australia
Korea
Thailand
408/438-8771
44-62-847-8011
33-1-40-67-1034
49-89-140-9331
65-292-6973
61-2-756-2359
82-2-556-7294
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70 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C
_____________________________________________________________________________________
Seagate Peripheral Family
Listed below are some of the SEAGATE Peripheral family members. For specific information on each member, refer to the appropriate documents.
Model
Name
Model
Number
Product
Manual Interface
Unformatted
Capacity (MB)
ST11200
ST12400
ST11200N/ND/NC
ST1980N/ND/NC
ST1950N
ST1830N
ST12400N/ND/NC
ST11900N/ND/NC
ST12400 Wide ST12400W/WD/WC
HAWK 1 Family
77738476(I)
77738476(I)
77738476(I)
77738476(I)
SCSI-2
SCSI-2
SCSI-2
SCSI-2
HAWK 2 Family
77767450(I)
77767450(I)
77767457(I)
SCSI-2
SCSI-2
SCSI-2
1248*
1021*
953
834
2537*
2003*
2537*
ST31200 ST31200N/ND/NC
ST3620N/NC
ST31200 Wide ST31200W/WD/WC
ST3620W
HAWK 1LP Family
77767452(I)
77767452(I)
77767461(I)
77767461(I)
SCSI-2
SCSI-2
SCSI-2
SCSI-2
1258.8*
651.8*
1258.8*
ST32430 ST32430N/ND
ST31230N/ND
HAWK 2LP Family
77767471(I)
77767471(I)
ST32430 Wide ST32430W/WD/WC/DC 77767480(I)
ST31230W/WD/WC/DC 77767480(I)
SCSI-2
SCSI-2
SCSI-2
SCSI-2
ST32151 ST32151N
ST31051N
HAWK 2XL Family
77767489(I)
77767489(I)
SCSI-2
SCSI-2
ST15230 ST15230N/ND
HAWK 4 Family
77767472(I)
ST15230 Wide ST15230W/WD/WC/DC 77767479(I)
SCSI-2
SCSI-2
SCSI Interface Manual, Vol. 2
SCSI INTERFACE
77765466 (II)**
SCSI Interface Manual; Vol. 2; Ver. 2 77738479 (II)**
SCSI-2
SCSI-2/SCSI-3
* Product Manual covers both Single-Ended and Differential Interfaces.
** Interface Manual for several different Product Manuals (Volume 2 of 2 Volume set).
2.59 GB*
1.28 GB*
2.59 GB*
1.28 GB*
5170 MB*
5170 MB*
N/A**
N/A**
Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C 71
______________________________________________________________________________________ continued from previous page
Model
Name
ST3600
Model
Number
Product
Manual
ST3500N
ST3600N
77738477(I)
77738477(I)
ST3610N/ND/NC 77738495(I)
ST3600A 77738485
Interface
SCSI-2
SCSI-2
SCSI-2
AT (IDE)
Unformatted
CapacityC(MB)
502
617
635*
617
ST1480
Family
WREN 5
Family
ST1400N
ST1401N
ST1480N
ST1481N
ST1581N
ST1480A
ST1400A
ST1401A
ST4442E
ST4383E
ST4384E
ST4702N
ST4385ND
ST4702ND
ST4385N
WREN 6
Family
ST4766N/ND
ST4766E
WREN 6 HH ST2383N/502N
Family ST2274A/383A
ST2182E/383E
WREN 7
Family
WREN 8
Family
ST41200N/ND
ST41200N/ND
ST41650N
ST41651N/ND
ST42100N WREN 9
Family
WRENRNR-2 ST4767N
Family ST4767E/769E
77765458(I)
77765458(I)
77765458(I)
77765458(I)
77738471(I)
77738463
77738463
77738463
77765300
77765300
77765300
77765336
77765366
77765378
77765353
77765358
77765414
77765393
77765369
77765417
77765374
77765470 (I)
77738474 (I)
77738475 (I)
77765445 (I)
77765457
SCSI-2
SCSI-2
SCSI-2
SCSI-2
SCSI-2
AT (IDE)
AT (IDE)
AT (IDE)
ESDI
ESDI
ESDI
SCSI
SCSI
SCSI
SCSI
ESDI
SCSI-1
AT (IDE)
ESDI
SCSI
SCSI-2
SCSI-2
FAST SCSI-2
FAST SCSI-2
SCSI-2
ESDI
* Product Manual covers both Single-Ended and Differential Interfaces.C
383
390
492
492
610
490
381
395
442 (15 Hd, 1412 Cyl)
383 (13 Hd, 1412 Cyl)
383 (15 Hd, 1224 Cyl)
702
385, 702 (Dif. I/O)*
385 (15 Hd, 791 Cyl)
766 (Dif. I/O)*
766, 383
383, 502
274, 383
182, 383
1200*
1200*
1650
1650
2200
767 (Fast Access)
767
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Publication Number: 77767457, Rev. C (03/95) Printed in USA
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