Conner CFP2105S Product manual

CFP2105 Series

Intelligent Disk Drive

Product Manual

October 1995

Pre-Release

Revision A

3081 Zanker Road

San Jose, CA 95134-2128

(408) 456-4500

FCC Notice

This equipment generates and uses radio frequency energy and, if not installed and used properly; that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment on and off, you are encouraged to try to correct the interference by one or more of the following measures:

• Reorient the receiving antenna.

• Relocate the computer with respect to the receiver.

• Move the computer into a different outlet so that the computer and receiver are on different branch circuits.

If necessary, you should consult the dealer or an experienced radio/television technician for additional suggestions. You may find the following booklet prepared by the Federal Communications Commission helpful:

How to Identify and Resolve Radio-TV Interference Problems

This booklet (Stock No. 004-000-00345-4) is available from the U.S. Government

Printing Office, Washington, DC 20402.

Warning: Changes or modifications made to this equipment which have not been expressly approved by Conner Peripherals, Inc. may cause radio and television interference problems that could void the user's authority to operate the equipment.

Further, this equipment complies with the limits for a Class B digital apparatus in accordance with Canadian Radio Interference Regulations.

Cet appareil numérique de la classe B est conforme au Règlement sur le brouillage radioélectrique, C.R.C., ch. 1374.

Conner and the Conner logo are registered trademarks of Conner Peripherals,

Inc. All other trademarks mentioned in this manual are property of their respective owners.

Copyright 1994, 1995, Conner Peripherals, Inc.

All rights reserved.

Document No. 501-072 10/95

Important Information About this Manual

All information contained in or disclosed by this document is considered proprietary by Conner Peripherals, Inc. By accepting this material, the recipient agrees that this material and the information contained therein are held in confidence and in trust and will not be used, reproduced in whole or in part, nor its contents revealed to others, except to meet the purpose for which it was delivered. It is understood that no right is conveyed to reproduce or translate any item herein disclosed without express written permission from Conner

Peripherals, Inc.

Conner Peripherals, Inc. provides this manual "as is," without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Conner

Peripherals, Inc. reserves the right to change, without notification, the specifications contained in this manual.

Conner Peripherals, Inc. assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any problem that might arise from the use of the information in this manual.

Table of Contents

1.

Overview of the Drives

What are the Drives?

Differences Between the Models

Features of the Drive

Drive Composition

Mechanical Design Features

Head Disk Assembly

Head Positioning Mechanism

Read/Write Heads and Disks

Data and Power Connections

Electrical Design Features

Integrated Circuit

Circuit Board

Firmware

2. Specifications

Specifications in this Chapter

Drive Capacity

Formatted Capacity*

Physical Configuration

Physical Configuration

Performance Characteristics

Seek Times (typical)*

Average Latency

Rotation Speed (+0.1%)

Controller Overhead

Start Time(Power Up)*

Stop Time at Power Down

Interleave

Read/Write Characteristics

Recording Method

Recording Density (maximum)

Flux Density (maximum)

Host Interface Characteristics

Command Set

Data Transfer Rate

Maximum Synchronous Transfer Offset:

Maximum Tagged Command Queue Depth:

Buffer Size:

Reliability

Data Reliability

Component Design Life

Start/Stop cycles

Mean Time Between Failures:

Preventive Maintenance

Power Requirements (Typical)

Minimum/Maximum Voltage:

Table of Contents

1

5

5

3

4

2

3

1

1

5

5

5

5

6

9

13

13

13

13

13

14

14

12

12

12

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12

12

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12

12

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11

10

11

11

11

9

10

10

10

Page i

Table of Contents

Page ii

Filepro CFP2105 Series

Environmental Tolerances

Magnetic Field:

Acoustic Noise:

Safety Standards

Physical Characteristics - CFP2105E

Physical Characteristics - CFP2105S

Physical Characteristics - CFP2105W

3. Drive Operations

Functions of the Drive

Drive Operational Modes

Data Error Correction

Downloadable Microcode

Buffer Management and Command Execution

Read Look Ahead Code

Write Caching

Tagged Command Queuing

Seek Re-ordering

Buffer Management

4. Installing the Drive

Take These Precautions

Installing the Drive

Installing a CFP2105E

Setting the Drive's Jumpers - CFP2105E

Setting the SCSI Bus Address - CFP2105E

Disabling Spin-Up at Power On - CFP2105E

Delaying Spin Up at Power On - CFP2105E

Cabling the Drive - CFP2105E

Attaching Power to the Drive - CFP2105E

Mounting the Drive - CFP2105E

Mounting Screw Holes

Cooling

Installing a CFP2105S

Setting the Drive's Jumpers - CFP2105S

Setting the SCSI Bus Address - CFP2105S

Disabling Spin-Up at Power On - CFP2105S

Delaying Spin Up at Power On - CFP2105S

Disabling the SCSI Bus Parity - CFP2105S

Disabling SCSI Bus Terminator Power (TERMPWR) -

CFP2105S

Setting the Bus Termination - CFP2105S

Cabling the Drive - CFP2105S

SCSI Bus Cable

Spindle Synchronization

Attaching Power to the Drive - CFP2105S

Mounting the Drive - CFP2105S


Cooling

Installing a CFP2105W

Setting the Drive’s Jumpers - CFP2105W

Setting the SCSI Bus Address - CFP2105W

Disabling Spin-Up at Power On - CFP2105W


37

38

38

38

35

36

37

37

38

40

40

41

42

32

32

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34

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31

31

31

34

35

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29

27

27

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28

23

23

25

26

21

21

22

22

26

26

27

15

15

15

16

17

18

19

21

Filepro CFP2105 Series Table of Contents

Delaying Spin Up at Power On - CFP2105W

Disabling the SCSI Bus Parity - CFP2105W

42

43

Disabling SCSI Bus Terminator Power (TERMPWR) -

CFP2105W

Using the J5 Auxiliary Connector

- SEL0

- XTFAULT

- SEL1

- VUNIQ

- SEL2

- SPSYNC

- SEL3

- XTACTV

- GROUND

+5 Volts

- FAULT

Setting the Bus Termination - CFP2105W

Cabling the Drive - CFP2105W

SCSI Bus Cable

Mixing Wide and Narrow SCSI Devices on a SCSI Bus

Spindle Synchronization

44

44

44

45

45

45

45

45

46

46

46

46

46

47

48

48

49

Error! Bookmark not defined.

Attaching Power to the Drive - CFP2105W

Mounting the Drive - CFP2105W


Cooling

47

47

47

47

5. Interface Physical Characteristics 49

Electrical Description

Output Characteristics

Input Characteristics

Model-Specific SCSI Physical Characteristics

CFP2105E (WIDE, 80-pin Single Connector Attachment [SCA])

External Terminator Power

Internal Termination

Cable Requirements

Connector Requirements

Single Connector Attachment (SCA) Signal Definitions

Power

Spindle Sync

LED Out

Motor Start Controls

SCSI ID Selection

Interface Pin Assignments

Interface Timing Requirements

Model CFP2105S (Narrow, 50-pin SCSI)



Cable Requirements




Model CFP2105W (Wide, Unitized SCSI-3 P-Connector)



56

57

58

59

54

55

55

55

60

60

60

52

52

52

53

51

51

51

52

51

51

51

51

49

49

50

50

Technical Reference Manual Page iii

Table of Contents Filepro CFP2105 Series

J5 Auxiliary Connector Signal Characteristics

Cable Requirements




6. SCSI Command Implementation

SCSI Command Summary

Drive Dependent SCSI Data

Error! Bookmark not defined.

Format Drive Page - 03H

Drive Geometry Page - 04H

Notch and Partition Parameters Page - 0CH

67

68

70

71

61

61

62

64

65

67

Page iv Filepro CFP2105 Series

Overview of the Drives

1

What are the Drives?

The CFP2105 series is a family of high performance 3.5-inch low-profile (1.0 inch high) 2.1GB (formatted) disk drives. They all offer 9.5 millisecond average seek time for Reading , 10.5 millisecond seek time for Writing, with an average latency of only 5.56 ms. High capacity is achieved by utilizing a zone density recording technique using 15 recording zones at an areal density of 302 Mbits per square inch. These drives feature high performance while maintaining low power consumption to reduce power supply current and system cooling requirements in disk arrays.

They are designed to operate on the Small Computer System Interface (SCSI) and are SCSI-2/3 command compatible. The mechanical and major electronic components are identical between the models and differ only in the host interface implementation:

Drive Model Form Factor

CFP2105E

CFP2105S

CFP2105W

1 inch high, 3.5 inch



Interface

80-pin Single Connector

FAST WIDE

50-pin FAST

68-pin FAST WIDE

Capacity

2147 MB

2147 MB

2147 MB

For simplicity, we often refer to these drives collectively in this manual as “the drive.”

Differences Between the Models

The three drive models differ only on the host interface implementation:

CFP2105E:

SCSI 80-pin Wide Single Connector Attachment (SCA) interface designed for applications such as Redundant Arrays in which the drives are plugged directly into a backplane. The drive also implements a Wide SCSI interface for high interface bandwidth.

CFP2105S:

SCSI 50-pin standard interface designed for applications which implement the standard SCSI-2 architecture.

CFP2105W:

SCSI 68-pin Wide interface designed for applications which require high interface bandwidth and the option of cabled interconnect. The drive utilizes the Unitized Connector defined by the Small Form Factor

Committee (refer to SFF-8009). The Unitized Connector combines the SCSI-3 Pconnector Wide interface, the standard 4-pin power and a 2mm pin pitch

Auxiliary connector into a single molded assembly.

Technical Reference Manual Page 1

Chapter 1 Overview of the Drives

Features of the Drive

The drive provides the following features:

•

512 KB segmentable cache buffer with adaptive cache management

•

Least Recently Used (LRU) Cache replacement

•

Automatic on-the-fly data error correction utilizing a 96-bit Reed-Solomon

EDAC.

•

Independent 48-bit CRC miscorrection detection.

•

On the fly header error detection and correction.

•

High performance rotary voice coil actuator with embedded servo system

•

No thermal recalibration required to maintain performance levels

•

High Shock resistance

•

Automatic actuator latch against the inner stop upon power down with dedicated landing zone

•

Active Termination with removable Resistor Packs

•

Active Negation output drivers for greater interface reliability

•

SCSI-2/3 Compatibility

•

Dual Microprocessor-controlled diagnostic routines that automatically execute at start-up

•

Sealed HDA

•

Down-loadable Code through SCSI Interface

•

1,7 run length limited code

•

Programmable Block Size (512 and 1024)

•

Tagged Command Queuing with Seek Re-ordering and Write/Read

Coalescing

Page 2 Filepro CFP2105 Series

Overview of the Drives Chapter 1

Drive Composition

The drive is composed of mechanical, electrical, and firmware elements.

Mechanical Design Features

The drive’s hardware includes the components described in the following sections. Figure 1-1 shows the drive top level assembly.

Figure 1-1

Drive Top Level Assembly

Damper

Head-Disk

Assembly

Printed Circuit

Board Assembly

Shield

Printed

Circuit

Board

Assembly

2105-1-1



Head Disk Assembly

The Head-Disk Assembly (HDA) consists of a die-cast aluminum base on which is mounted a die-cast aluminum cover. Both the base and the cover are made from a corrosion resistant aluminum alloy. A gasket seals the joint between the base and cover to retard the entry of moisture and environmental contaminants.

The head-disk assembly, contains an integral 0.3 micron filter, which maintains a clean environment. Critical drive components are contained within this contaminant-free environment. Figure 1-2 shows the HDA and the major subassemblies contained within it:

Figure 1-2

Head-Disk Assembly

Top Cover

Disk Clamp

Disk (1 of 5)

Disk

Spacer (1 of 4)

Filter

Gasket

Preamplifier/

Flex Circuit

Assembly

Head-Stack

Assembly

Page 4

2107_1_2

Spindle Motor

Base Assembly

Actuator

Magnet

Assembly



Drive Motor and Spindle

A brushless DC direct-drive motor assembly is mounted on the drive’s base. The motor rotates the drive’s spindle at 5400 RPM. This motor/spindle assembly is dynamically balanced to provide minimal mechanical runout to the disks. A dynamic brake is used to provide a fast stop to the spindle motor and return the heads to the landing zone when power is removed.

Head Positioning Mechanism

The read/write heads are supported by a mechanism coupled to a rotary voice coil actuator.

Read/Write Heads and Disks

Data is recorded on 95mm diameter disks through 3370-type 50% nano-slider thin film heads with transverse pressure contour (TPC) air bearing surfaces.

The TPC air bearing surface allows the head to fly at a uniform height regardless of radial position. This improves data reliability and allows the aerial density to be more uniform with radius. The CFP2105 series contains five sputtered thin film disks with ten data surfaces and ten read/write heads.

At power-down, the heads are automatically retracted to the inner diameter of the disk and are latched and parked on a landing zone that is inside the data tracks.

Data and Power Connections

Data and power connections to the drive differ between the drive models. Refer to chapter 4 for information regarding a specific model's requirements.

Electrical Design Features

Integrated Circuit

A single integrated circuit (IC) is mounted within the HDA in close proximity to the read/write heads. The IC provides head selection, read pre-amplification, and write drive circuitry.

Circuit Board

The drive’s dual-microprocessor-controlled circuit board provides the remaining electronic functions, which include:

• read/write circuitry

• rotary actuator control

• interface control

• spin speed control

• auto-park

• power management


Chapter 1

Firmware

Page 6

Overview of the Drives

The background processor is a 16-bit Motorola 68HC16. The entire data path between the serializer-deserializer and the interface chip, including the buffer

(cache) is 16 bits wide to provide high data throughput. The SCSI interface chip manages a 16-bit to 8-bit conversion prior to transacting data over the SCSI bus for 8-bit narrow SCSI applications.

The data buffer (cache) utilizes a 256K x 16 Dynamic RAM. Data path integrity is ensured by using a 4-byte CRC which is appended to the data upon receipt by the SCSI Interface Chip. This CRC is verified by the buffer manager when the data is taken out of the buffer to be written to the disk and the CRC is written with the data. A typical sector data field consists of 512 bytes of data, 4 bytes of

CRC and 18 bytes of Error Detection And Correction (EDAC) code. The same

CRC checks are performed during an outbound process and the CRC is stripped from the data prior to sending it to the Host.

The SCSI interface functions are managed by a 8-bit Motorola 68HC11 microprocessor. Low SCSI transaction overhead is maintained by automating common SCSI bus phase sequencing using a state machine in the SCSI Interface

Chip.

Read/Write Channel

The Read/Write channel, in addition to the preamplifier discussed earlier, consists of three integrated circuits:

•

Pulse Detector

•

Data Separator

•

Time base

The drive’s firmware can be considered in two parts. The first part principally resides in the ROM for the 68HC16 background processor. This processor is responsible for:

• starting the spindle motor and maintaining precise rotational speed

• controlling track following and actuator motion during seeking

• managing background R/W activity

• power management

• monitoring the overall health of the drive.

The interface processor's control microcode resides in both ROM and RAM. The

RAM portion of the microcode can be upgraded in the field with using software.

Additional information regarding the RAM code can be found in Chapter 3, page

22. The interface processor firmware functions include:

• reporting drive status and error conditions to the host

• manage operating parameters for the drive

• parsing the Command Descriptor Block and checking for illegal fields

• converting the LBA to CHS and initiating read and write operations to the background processor

• defect management



• serial port communications

Since parsing/decoding of commands and execution of the Read/Write functions are handled by separate processors, command execution can be overlapped in multiple initiator or Tagged Command Queuing environments. Functions such as seek re-ordering and command coalescing can also be overlapped when the drive is operating with a host environment capable of supporting Tagged

Command Queuing.

For more information on the drive’s interface implementation and command set, refer to the Eleventh Generation SCSI Interface Manual.




Specifications

Specifications in this Chapter

This chapter provides the following specifications for the drive:

• drive capacity

• physical configuration

• performance characteristics

• read/write characteristics

• reliability

• power requirements

• environmental tolerances

• safety standards

• physical characteristics

2


Chapter 2

Drive Capacity

Formatted Capacity*

•

CFP2105 Series: 2147 MB

*1MB is equal to 10

6

or 1,000,000 bytes

Physical Configuration

Specification:

Disk Type

Head Type

Actuator Type

Number of Disks

Data Surfaces

Data Heads

Servo

Tracks per Surface

Track Density @ 0

°

Skew

Bytes per Block

Blocks per Drive (logical)

CPF2105 Series

Sputtered Thin film

Thin Film - TPC

Rotary Voice-Coil

5

10

10

Embedded

3948

4030 TPI

512

4,194,304

Specifications

Physical Configuration

Data Rate

(Mbits/sec)

Zone 0 (OD)

Zone 1

Zone 2

Zone 3

Zone 4

Zone 5

Zone 6

Zone 7

Zone 8

Zone 9

Zone 10

Zone 11

Zone 12

Zone 13

Zone 14 (ID)

68.7

65.1

62.7

60.6

57.9

54.7

53.5

50.9

48.5

45.5

43.0

41.1

37.1

35.1

33.3

Data Tracks per

Zone per Surface

356

175

228

254

266

362

433

271

244

307

222

166

360

182

114

User Sectors per Track *

111

108

103

99

92

139

132

127

122

119

87

83

79

71

67

* The physical track configuration contains one spare sector per track.


Specifications Chapter 2

Performance Characteristics

Seek Times (typical)*

•

Track to Track: 1.9 msec

•

Average (read/write): 9.5/10.5 msec**

•

Full Track: 21 msec

* The timing is measured from the time the last byte of the command descriptor block is written to the time seek is initiated by the drive operating at nominal DC input voltage and nominal operating temperature.

** The average seek time is determined by averaging the seek time for a minimum of

1000 seeks of random length over the surface of the disk.

Average Latency

•

5.56 milliseconds

Rotation Speed (+0.1%)

•

5400 RPM

Controller Overhead

•

700

µ sec

Start Time(Power Up)*

•

0 RPM to Ready

−

Typical: 12 seconds

* This assumes spin recovery is not invoked. If spin recovery is invoked, the maximum could be 40 seconds. Briefly removing power can lead to spin recovery being invoked.

Stop Time at Power Down

•

Typical: 7 seconds

•

Maximum: 10 seconds

Interleave

•

1:1


Chapter 2

Read/Write Characteristics

Recording Method

•

1,7 RLL code

Recording Density (maximum)

•

73,900 bits per inch

Flux Density (maximum)

•

55,400 flux reversals per inch

Specifications

Host Interface Characteristics

Command Set

•

SCSI-2 (refer to the Eleventh Generation SCSI Technical Reference Manual for command implementation)

Data Transfer Rate

•

To/from Buffer, synchronous narrow: 10.0 MByte/second

•

To/from Buffer, synchronous wide: 20.0 MByte/second

Maximum Synchronous Transfer Offset:

•

15 bytes/words

Maximum Tagged Command Queue Depth:

•

32 commands

Buffer Size:

•

512 KB, segmentable


Specifications

Reliability

Data Reliability

•

< 1 non-recoverable error in 10

14

bits read

Component Design Life

•

5 years

Start/Stop cycles

•

20,000 minimum

Mean Time Between Failures:

•

1,000,000 power-on hours*

* Projected MTBF based on comparison of similar Conner products

Preventive Maintenance

•

None

Chapter 2


Chapter 2 Specifications

Power Requirements (Typical)

Mode

Read/Write

Seek (100%)

Seek (40%)

Idle

Standby

Spin-up

+12V DC

(typical 1)

340 mA

760 mA

400 mA

320 mA

1 mA

1.7 A

+5V DC

(typical 2)

600 mA

470 mA

400 mA

400 mA

640 mA

700 mA

Power

(typical)

7.0 W

11.5 W

6.8 W

5.8 W

3.2 W

N/A

Power

(maximum)

7.6 W

12.2 W

7.0W

6.2 W

3.4 W

N/A

1 Typical conditions are both voltages at nominal value, room temperature (25° C) ambient to the drive without terminators installed. Maximum power is when the supply voltage is at the worst case condition.

2 Termination current of 700mA for narrow SCSI and 900 mA for wide SCSI is required for that device which is terminated.

Minimum/Maximum Voltage:

•

+5V: +5%

•

+12V: +5%

Maximum Peak-to-Peak Allowable Noise

(DC to 1 Mhz: equivalent resistive load):

•

+5V: 2%

•

+12V: 1%


Specifications

Environmental Tolerances

Temperature:

•

Operating: 5° to 55° C

•

Non-operating: -40° to 60° C

•

Thermal Gradient: 20° C per hour maximum

Relative Humidity (non-condensing):

•

Operating: 5 to 95%

•

Non-operating: 5 to 95%

•

Maximum Wet Bulb: 29°C

Altitude (relative to sea level):

•

Operating: -200 to 10,000 feet

•

Non-operating: 40,000 feet (maximum)

•

Altitude Gradient: 1,000 feet/minute

Shock (half-sine pulse, 11 ms duration):

•

Operating: 5G peak without non-recoverable errors

•

Non-operating: 75G without non-recoverable errors

Vibration (swept-sine, one octave per minute):

•

Operating

−

5 - 32 Hz: 0.010 inch displacement; peak to peak

−

33 - 400 Hz: 0.5G without non-recoverable errors

•

Non-operating

−

5 - 28 Hz: 0.100 inch displacement; peak to peak

−

29 - 400 Hz: 4G peak

Chapter 2

Magnetic Field:

•

The disk drive will meet its specified performance while operating in the presence of an externally-produced magnetic field under the following conditions:

Field Frequency

DC to 700 Khz

700 Khz to 1.5 Mhz

Intensity

6 gauss

7 milligauss

3 milligauss

Acoustic Noise:

•

The acoustic level will not exceed 4.3 Bels sound power in Idle Mode.



Safety Standards

The drive is designed to comply with relevant product safety standards, including:

•

UL 478, 5th edition, Standard for Safety of Information Processing and

Business Equipment

•

UL 1950, Standard for Safety of Information Technology Equipment

•

CSA 22.2 #220, Information Processing and Business Equipment

•

CSA 22.2 #950, Safety of Information Technology Equipment

•

IEC 380, Safety of Electrically Energized Office Machines

•

IEC 950, Safety of information Technology Equipment Including Electrical

Business Equipment

•

VDE 0805, VDE 0805 TIEL 100, and VDE 0806

•

Complies with FCC Class B, Part 15, Subpart J


Specifications

Physical Characteristics - CFP2105E

Height:

•

1.0 inch + .020

Width:

•

4.0 inches + .015

Depth:

•

5.75 inches +.03/

-

.01

Weight:

•

1.4 pounds

Figure 2-2

The Drive’s Physical Dimensions

0.41 [10.41]

MAXIMUM

Zone

6X

6-32 UNC-2B

.16 [4.06] MAX.

INSERTION

4.000 +0.015

[101.60 +0.38]

Chapter 2

.153 +0.016

[3.89 +0.41]

5.120

+0.032

-

0.017

+0.81

0.43

2.362

[59.99]

4.000

[101.60]

5.75

+0.03

-

0.01

+0.76

-

0.25

5.120 +0.024

[130.05 +0.61]

1.008 +0.022

[25.60 +0.56]

Pin 1 Ref.

4.00

+.00

-

.01

+0.00

[ ] w/in Zone

4X 6-32 UNC-2B

.22 [5.59] MAX. INSERTION

1.750

[44.45]

2.375 +0.015

[60.33 +0.38]

1.00 +0.02

[25.40 +0.51]

.63 [16.00]

.250 [6.36]

.125 +0.010

[3.18 +0.25]

Tolerance: .xxx +.005

.xx +.020

210X-2-2

3.750 [95.25]

2.623 +0.018

[66.62 +0.46]

.065 +0.018

[1.65 +0.46]


Chapter 2

Physical Characteristics - CFP2105S

Height:

•

1.0 inch + .020

Width:

•

4.0 inches + .015

Depth:

•

5.75 inches +.03/

-

.01

Weight:

•

1.4 pounds

Figure 2-3


.41 [10.41]

MAXIMUM

Zone

4.000 +0.015

[101.60 +0.38]

Specifications

.140 +0.019

[3.56 +0.48]

2.734 +0.018

[69 44 +0.46]

.975 +0.005

[24.77 +0.13]

4.00

+.00

-.01

[ ]

-0.25

w/in Zone

.190 +0.016

[4.83 +0.41]

4X 6-32 UNC-2B


6X

6-32 UNC-2B

.16 [4.06] MAX.

INSERTION

4.000

[101.60]

5.75

+0.03

-

0.01

+0.76

[ ]

1.750

[44.45]

2.362

[59.99]

2.375 +0.015

[60.33 +0.38]

1.00 +0.02

[25.40 +0.51]

.250 [6.36]

.63 [16.00]

.125 +0.010

[3.18 +0.25]


.xx +.020

3.750 [95.25]

3.413 +0.018

[86.69 +0.46]

2.623 +0.018

[66.62 +0.46]

.065 +0.018

[1.65 +0.46]

210X-2-3


Specifications

Physical Characteristics - CFP2105W

Height:

•

1.0 inch + .020

Width:

•

4.0 inches + .015

Depth:

•

5.75 inches +.03/

-

.01

Weight:

•

1.4 pounds

Figure 2-4


4.000 +0.015

[101.60 +0.38]

0.41 [10.41]

MAXIMUM

Zone

1.977 +0.018

[50.22 +0.46]

2.720 +0.018

[69.09 +0.46]

4.00

+.00

-.01

1.610 +0.005

[40.89 +0.13] w/in Zone

Chapter 2

.190 +0.016

[4.83 +0.41]

4X 6-32 UNC-2B


6X

6-32 UNC-2B

.16 [4.06] MAX.

INSERTION

4.000

[101.60]

5.75

+0.03

-

0.01

2.362

[59.99]

1.00 +0.02

[25.40 +0.51]

.63 [16.00]

.250 [6.36]

.125 +0.010

[3.18 +0.25]


.xx +.020

210X-2-4

Technical Reference Manual

3.750 [95.25]

2.623 +0.018

[66.62 +0.46]

1.750

[44.45]

2.375 +0.015

[60.33 +0.38]

.065 +0.018

[1.65 +0.46]

Page 19



Drive Operations

3

Functions of the Drive

This chapter describes certain operational aspects of the drive, including discussions of:

• drive operational modes

• error correction

• read error recovery

• downloadable microcode

• buffer management

Drive Operational Modes

For the purpose of defining power requirements the following modes have been defined:

••

Read/Write Mode without seeking or head switching data is read from or written to the disk continuously.

••

Seek Mode (100%) occurs when the drive is issued continuous seek commands and the actuator is in motion

••

Seek Mode (40%) occurs when 1/3 stroke seeks are performed at a 40% seek duty cycle. While the actuator is not in motion the drive is reading or writing.

••

Idle Mode occurs when the drive is not reading, writing, or seeking. The motor is up to speed and the Drive Ready condition exists. The actuator is residing on the last-accessed track.

••

Standby Mode occurs when the motor is stopped and the actuator is latched in the landing zone. The drive will enter Standby mode after poweron reset if the Disable Spin jumper is installed or the DSPN bit in MODE

SELECT page 0 is set. A STOP UNIT command will also place a drive into

Standby Mode. The drive will spin up and go into Idle mode when a START

UNIT command is issued or on a timed basis by SCSI ID if the SDLY bit is set in MODE SELECT page 0. Refer to the MODE SELECT and MODE

SENSE commands in the Eleventh Generation SCSI Interface Manual for additional details.

••

Spin-Up Mode occurs while the drive's spindle motor is being spun up to speed after initial power on or after exiting Standby Mode.


Chapter 3 Drive Operations

Data Error Correction

The drive uses a three way interleaved 96-bit Reed-Solomon code to perform error correction. An additional 48-bit Cyclic Redundancy Code (CRC) provides additional miscorrection detection. For each 512-byte block, the on-the-fly error correction polynomial is capable of correcting:

• one error burst of up to 41 bits in length

• two error bursts each up to 17 bits in length

The miscorrection probability is less than 1 bit in 10

24

bits transfered.

Downloadable Microcode

The SCSI interface code is split into two parts which are designated as ROM or

RAM code. The ROM code contains the basic SCSI operating code and code to support commands such as INQUIRY, TEST UNIT READY, REQUEST SENSE,

START/STOP UNIT, etc., which may have to be responded to prior to the drive being in a ready state. The part of the interface code referred to as RAM code resides on an area of the disk which is reserved to the drive and is not directly accessible through the interface. This code is referred to as RAM code because it is read from the disk and is loaded into static RAM after power is applied to the disk, as soon as the drive is able to read from the disk.

The RAM code consists of a resident portion which is loaded after a Power On

Reset. Two different versions of RAM code overlays also reside on the disk. The read look ahead code overlay is the default and is loaded into RAM during the initial power-on. If a Queue Tag message is received by the drive, the drive will execute the command and while it is in Status Phase, will read the Queuing code overlay from the disk and load it into the RAM. This operation takes about 600 milliseconds, after which the drive will complete the command by sending the status. The drive will continue to operate with Queuing code residing in RAM until the next Power On Reset.

Refer to the next section for a discussion of the buffer management implications for the different RAM codes.

The RAM code may be upgraded on the disk via the factory serial port or through the interface using the WRITE BUFFER command. Refer to the

WRITE BUFFER command in the Eleventh Generation SCSI Interface Manual for a discussion of the procedure.


Drive Operations Chapter 3

Buffer Management and Command Execution

The drive contains a 512Kbyte segmentable buffer which is dynamically configured to adapt to the particular drive configuration or operating environment.

Read Look Ahead Code

The Read Retention RAM code executes commands sequentially as they are received from the initiator(s). Commands from multiple initiators may be queued and overlapped so that the subsequent command can be parsed while the current command is being executed.

The drive's 512K byte buffer is configured as four segments. These segments allow the drive to cache sequential data from four separate areas on the disk.

This can significantly improve performance in any environment in which multiple disk files are kept open simultaneously and operated upon in some interleaved fashion.

The Look-Ahead RAM code segments the 512 KB buffer into four 130,548 byte

(FD

H

blocks) segments. The remainder of the RAM is used by the microprocessor as a scratch pad area and for non read or write data information transfers. The buffer block size is equal to the data block size (typically 512 B) plus the 4 bytes of buffer CRC appended to each block. (refer to the Electrical

Design Feature section in Chapter 1 for a description of the buffer CRC).

Buffer operations default on Power-up to Read Look Ahead enabled and Write

Caching disabled. MODE SELECT page 8, byte 2, bit 0 (RCD), when set to one disables the read look-ahead cache function and bit 2 (WCE), when set to one enables write cache. In addition, MODE SELECT page 8, byte 3 contains two fields which control the retention priority for reads and writes. Refer to the

Eleventh Generation Disk Drive SCSI Interface Manual for additional details.

When a read command is received by the disk drive, the cache tables are searched to determine if the requested data is contained in any of the four cache segments (a cache hit). If there is no cache hit, the Least Recently Used (LRU) segment is selected and a read from disk is initiated into that segment which is now considered the Active Segment. The retention of data already transferred to the host and read look ahead in the Active Segment buffer is controlled by the state of the Read Retention Priority.



Read Retention On (Read Retention Priority = 0 or F):

The interface processor initiates a full segment read of 253 sectors (FD

H

blocks) to the background processor. There are three different situations which would be considered a cache hit on a subsequent read.

•

Full: All of the data requested is transferred from the buffer segment and retained.

•

Partial: Some but not all of the data is cached in a buffer segment. If the cached data is in the Active Segment and the remaining data is part of the full segment read, the drive will transfer the requested data from the buffer as the background process fills it. If the cached data is in the Active

Segment but the remaining data is not part of the full segment read, the drive will turn off read retention until the next Active Segment miss occurs and issues a new read (forever) to the background process. This allows the drive to adapt to long sequential reads even in read retention mode. If the data is part of an Inactive Segment, a new full segment read is initiated, making this the Active Segment.

•

Potential: If none of the data is in the Active Segment, but is part of the full segment read, the drive will transfer the data as it becomes available.

Read Retention Off (Read Retention Priority = 1): The interface processor initiates a "read forever" command to the background processor and the buffer segment is treated as a circular buffer which is back filled as sectors are transferred to the host. There are three different situations which would be considered a cache hit on a subsequent read.

•

Full: All of the requested data is cached in a buffer segment. If it is the

Active Segment, the data will be transferred to the host and refilled with next sequential data. If the data in an Inactive Segment, the data is transferred to the host and retained.

•

Partial: This is when some, but not all of the data is cached in a buffer segment. If the data is in the Active Segment, data is transferred to the host as the background process fills the buffer and the "read forever" is allowed to refill the buffer. If the data in an Inactive Segment, the cached data is transferred and a new read operation is initiated for the remaining data, making this the Active Segment.

•

Potential: None of the data is cached. The active segment is checked and if the requested data is within 63 sectors of being read, the drive will allow the

"read forever" operation to continue and the data is transferred to the host when it is available.


Drive Operations Chapter 3

Write Caching

Write Caching allows multiple write commands operating on sequential blocks to be written to the medium without losing a motor revolution between commands.

Write caching is enabled by setting the WCE bit in MODE SELECT page 8 to one. The WCE bit is only valid while the Read Look Ahead code is loaded. The

WCE bit is ignored when the Tagged Command Queuing code is in RAM because write coalescing will be active.

The drive will send good status and COMMAND COMPLETE message following the data out phase of a cached write command. The drive will cache writes when the following conditions are met:

•

Two or more write commands (Op Code 0A

H

or 2A

H

) execute consecutively without an intervening command.

•

The write commands address consecutive logical block ranges.

•

At least one logical block of data has been received in the buffer from the second write command in time to allow the medium to be written before an additional spindle revolution would be required.

•

Both writes are from the same initiator.

•

Neither write is a linked command.

If the drive encounters an error during a cached write operation, the drive will respond by:

If AWRE (MODE SELECT page 01

H

) is 0: the drive will report a CHECK

CONDITION on the next command and the response from a REQUEST SENSE will be a deferred error. (Asynchronous event notification is not supported by this drive.) Refer to the Eleventh Generation SCSI Interface Manual for additional details.

If AWRE (MODE SELECT page 01

H

) is set to 1: the drive will attempt to dynamically reassign the block of data and complete the operation. If the reassignment fails, the drive will continue to reassign the block until all the space in the grown defect list is filled (147 sectors, maximum).



Tagged Command Queuing

The drive, operating using the Tagged Command Queuing code, can queue up to

32 commands. Commands in the queue which involve seeks are re-ordered using a Scan (elevator seek methodology). Read and Write commands are coalesced (combined into a single operation to the background processor) to minimize inter processor communication overhead and reduce mechanical motion.

Seek Re-ordering

Seeks are re-ordered using the Scan or what is sometimes referred to as the elevator seek method. Seeks already in the queue are re-ordered so they can be executed sequentially on a sweep toward the inner diameter (ID) or the outer diameter (OD) of the disk. Any new seeks entering the queue ahead of the sweep is ordered for execution during the current sweep. Any new seeks entering the queue behind the current sweep are held for re-ordering during the reverse sweep. When there are no more commands in the queue ahead of the current sweep, the direction of the sweep is reversed.

Seek re-ordering is controlled by Message Code (Simple, Head of Queue or

Ordered Queue) during the Message Phase. Re-ordering of seeks issued with a

Simple Queue Tag message may also be restricted using the Queue Algorithm

Modifier bits in MODE SELECT page 0A

H

. Refer to the Eleventh Generation

SCSI Interface Manual for additional information on Messages and MODE

SELECT page 0A

H

.

Buffer Management

The 512K byte buffer is treated by the queuing code as two 240KB buffers (F0

H sectors) to maximize coalescing. Look ahead reads are performed by the drive when there are no commands in the queue awaiting execution. Look ahead reads are not performed when there are commands in the queue since another command will be waiting for execution as soon as the current command completes and because the queue affords pre-knowledge of subsequent commands instead of having to anticipate them.

Sequential read or write commands are coalesced into single commands to the background processor. On a read operation, the data associated with each queue tag is transmitted to the host as the buffer is filled by the background processor.

On write operations, the drive will connect to the initiator(s), transmit the data into the buffer and disconnect; coalescing sequential data in the buffer before initiating the write to the background processor. The drive will reconnect with each of the writes, using the queue tags, completing the command after the data has been written to the disk. This operation provides the performance of write caching without the exposure of completing the command prior to writing the data to the disk.


Installing the Drive

Take These Precautions

To protect your equipment from electrostatic damage, perform the installation at a static-safe workstation. If one is not available, follow these guidelines:

1. Work in an uncarpeted area.

2. Before removing the equipment from its anti-static bag,

discharge static electricity by touching your computer's

metal chassis (or any other grounded object) while

touching the anti-static bag.

3. Do not touch circuit boards unless instructed to do so.

0170

Installing the Drive

To install the drive, you must:

• set the drive’s jumpers, if desired

• attach a data cable to the drive

• attach power to the drive

• mount the drive

These procedures differ between the various drive models.

4


Chapter 4 Installing the Drive

Installing a CFP2105E

The following paragraphs describe the installation procedure for a 16-bit Single

Connector Attachment (SCA) interface, model CFP2105E drive.

Setting the Drive's Jumpers - CFP2105E

There are no jumpers to set on the model CFP2105E and CFP1007E drives since all the necessary control signals are on the SCA connector. This drive is intended for applications where the drive is configured at the interface when the drive is plugged into the interface connector.

Setting the SCSI Bus Address - CFP2105E

The SCSI bus ID of the drive is set by grounding the Interface bus signals shown below in Table 4-4.

Table 4-4

Setting the SCSI ID

SCSI ID SCSI ID(0) SCSI ID(1) SCSI ID(2) SCSI ID(3)

11

12

13

14

15

7

8

9

10

5

6

3

4

0

1

2

Open

Ground

Open

Ground

Open

Ground

Open

Ground

Open

Ground

Open

Ground

Open

Ground

Open

Ground

Open

Open

Ground

Ground

Open

Open

Ground

Ground

Open

Open

Ground

Ground

Open

Open

Ground

Ground

Open

Open

Open

Open

Ground

Ground

Ground

Ground

Open

Open

Open

Open

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Open

Open

Open

Open

Open

Open

Open

Open


Installing the Drive Chapter 4

Disabling Spin-Up at Power On - CFP2105E

Spin up upon application of power to the drive can be disabled by grounding the

RMT_START line on the interface. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00

H

(Vendor Specific Parameters). The Host must issue a START UNIT command to cause the drive to spin up. Refer to the Eleventh Generation SCSI Technical

Reference Manual for additional information regarding the MODE SELECT and

START/STOP UNIT commands.

Table 4-5

Disabling Spin Up at Power On

RMT_START

Ground

Ground

Open

Open

DSPN

0

1

0

1

Result

Spin Disabled

Spin Disabled

Spin up on Power On

Spin Disabled

Delaying Spin Up at Power On - CFP2105E

Grounding the DLYD_START signal on the interface delays spin up on power-up by the value of the drive's SCSI ID multiplied by 4 seconds (i.e. SCSI ID 4 will delay 16 seconds). Delaying spin up on application of power can also be enabled by setting the SDLY bit in MODE SELECT page 00

H

(Vendor Specific

Parameters). Refer to the Eleventh Generation SCSI Technical Reference

Manual for additional information regarding the MODE SELECT command.

Table 4-6

Delaying Spin Up at Power On

DLYD_START

Ground

Ground

Open

Open

SDLY

0

1

0

1

Result

Spin Delayed

Spin Delayed

Spin up on Power On

Spin Delayed

Cabling the Drive - CFP2105E

The drive may be connected to the host SCSI interface directly through a backplane SCA connector or through cabling. Both the connector and cabling is described in Chapter 5.



The design of the SCSI bus interconnect system should meet the following guidelines, particularly with FAST SCSI-2 systems:

•

Do not route the data signals next to any high frequency or large current switching signals. Unreliable drive operation can result from improper signal routing.

•

Signal line stubs should not exceed 0.1 meter (4 inches).

•

There should be 0.3 meters (12 inches) of transmission line between drives.

•

The total length of any signal line should not exceed 6 meters (20 feet) and may have to be reduced if excessive impedance discontinuities exist on the bus.

•

Maintain a minimum of 0.050 inches (1.27mm) gap between adjacent signal.runs to control crosstalk between signal lines.

•

Signals routed over a ground plane or between ground planes have different characteristic impedance. Signals with critical timing like REQ, ACK and

Data should be routed similarly.

The signal length between devices should either be spaced shorter than the stub length, which treats a group of devices as a lumped element, or far enough apart that a transmission line exists (0.3 meters or 12 inches). These signal length considerations should include the length of signal traces and connectors on the printed circuit board. The diagram below shows how it is possible to interconnect six 1-inch height drives over a relatively short length of interconnect.

3" [0.08m] maximum

12" [0.3m] minimum

These guidelines apply to both cabled and backplane implementations.

Guidelines specifically for cabled implementations can be found on page Error!

Bookmark not defined.. While it is possible to connect SCA drives using a cable, users should be aware that the mating connector is designed for 0.025 inch

(0.63 mm) pitch 30 AWG wire. There are four +12 volt and three +5 volt line pairs carrying power to the drive on the SCA so spin up must be staggered to connect two drives on the same cable and the cable length kept to a minimum.

Otherwise, there should only be one drive per cable.

Attaching Power to the Drive - CFP2105E

The drive is powered through the SCA connector.



Mounting the Drive - CFP2105E

The drive is designed to be used in applications where the unit may experience shock and vibrations at greater levels than larger and heavier disk drives will tolerate.

The design features which allow greater shock tolerance are the use of rugged heads and media, a dedicated landing zone, closed loop servo positioning and specially designed motor and actuator assemblies.

Mounting Screw Holes

Six side, or four bottom base mounting points are provided to the customer. The drive is mounted using 6-32 UNC -2B X 0.16 maximum insertion length screws.

Refer to Figure 2-2 in Chapter 2 for the location of the mounting holes. The drive may be mounted in any orientation.

Cooling

The enclosure design for the drive must provide adequate provision for removing heat generated by the drive via conduction or air flow convection cooling. The maximum operating temperature for the drive is 55°C. A temperature sensor mounted on the drive at the location shown below should remain at or below

55°C while the drive(s) are operated at the worst case condition.

Recommended

Themocouple location

The enclosure design should allow air flow above and below the drive to cool both the

HDA and printed circuit board assembly.

The drive(s) should be positioned in the path of least resistance to the flow of air so that the flow is not routed around the drive. Placing the drive at the source of the shortest air flow path helps to ensure adequate air flow and avoids pre-heating of the air by other heat generating sources.



Installing a CFP2105S

The following paragraphs describe the installation procedure for a 8-bit, 50-pin

SCSI-2 interface, model CFP2105S drive.

Setting the Drive's Jumpers - CFP2105S

Figure 4-3 shows you where the drive’s jumpers are located.

Figure 4-3

Jumper Locations

J1

OE1

:

OE3

OE5, Disable

Spin

J3

SS

LED

J6

LED

E8

F1

J2 pin 1

J7

E1..E3

E7 (Disable Parity)

E6 (Delay Spin)

E5 (Disable Spin)

E4: Reserved

J4

2107_4_3



Setting the SCSI Bus Address - CFP2105S

There are three jumpers available for configuration of the SCSI ID: E1, E2, and

E3.

An optional 2mm pin pitch right angle header is located on the front of the

PCBA (opposite the SCSI interface connector) which allows changing the SCSI

IDs while the drive is mounted in the system. The header includes three pins,

0E1, 0E2 and 0E3 which can alternatively be used to select the SCSI Bus address. This connector may also be used to cable the SCSI ID select to a remote switch. A receptacle connector Amp P/N 111622-1 or equivalent can be used to connect a ribbon cable to this header.

Table 4-6 defines the relationship between the jumpers and the SCSI ID:

Table 4-7


Optional header

Standard

0E1

E1

Out

In

Out

In

Out

In

Out

In

0E2

E2

Out

Out

In

In

Out

Out

In

In

0E3

E3

In

In

In

In

Out

Out

Out

Out

SCSI ID

6

7

4

5

2

3

0

1

Note: When controlling the SCSI ID remotely, In = Ground or TTL

Low and Out = Open or TTL High. The odd numbered pins (lower row) are grounded and the even numbered pins carry the signal.



Disabling Spin-Up at Power On - CFP2105S

A jumper in the E5 location, disables spin up after power-on for applications where spin up sequencing is necessary. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00

H

(Vendor Specific Parameters). The Host must issue a START UNIT command to cause the drive to spin up. Refer to the Eleventh Generation SCSI Technical


START/STOP UNIT commands. Refer to Figure 4-3 for the location of the

Disable Spin jumper, E5.

Table 4-8

Disabling Spin Up at Power-On

E5

In

In

Out

Out

DSPN

0

1

0

1

Result

Spin Disabled

Spin Disabled

Spin up on Power On

Spin Disabled

Note: In = Ground or TTL Low and Out = Open or TTL High. The odd numbered pin is grounded and the even numbered pin carries the signal.

Delaying Spin Up at Power On - CFP2105S

A jumper in the E6 location, delays spin up on power-up by the value of the drive's SCSI ID multiplied by 4 seconds (i.e. SCSI ID 4 will delay 16 seconds).

Delaying spin up on application of power can also be enabled by setting the

SDLY bit in MODE SELECT page 00

H

(Vendor Specific Parameters). Refer to the Eleventh Generation SCSI Technical Reference Manual for additional information regarding the MODE SELECT command. Refer to Figure 4-3 for the location of the Delayed Spin jumper, E6.

Table 4-9


E6 SDLY Result

In

In

Out

Out

0

1

0

1

Spin Delayed

Spin Delayed

Spin up on Power On

Spin Delayed




Disabling the SCSI Bus Parity - CFP2105S

SCSI parity is always enabled in both directions, unless the E7 Parity disable jumper is installed. Installing the jumper will cause the drive to ignore SCSI bus Parity In but it will continue to generate SCSI bus Parity Out.

Disabling SCSI Bus Terminator Power (TERMPWR) - CFP2105S

Power to the on-board terminators is provided by the higher of the voltage supplied at Pin #26, J2 or the voltage level at the 5 Volt power input to the drive minus one diode drop. Termination Power to external terminators can be supplied by the drive through Pin #26, J2. The signal output characteristics are described in chapter 5. The TERMPWR line can be disconnected from the drive by removing Jumper E8.

Table 4-10

Disabling SCSI Bus TERMPWR

Jumper E8

In

Out

Result

TERMPWR (J2, Pin #26) connected to the drive's internal termination power.

TERMPWR (J2, Pin #26) open circuit.



Setting the Bus Termination - CFP2105S

This drive provides on-board Alternative 2 active termination for the SCSI bus.

The termination resistors, which are contained in two Single Inline Packs (SIPs) should be removed from the drive unless it is a SCSI device at the physical end of the bus. Figure 4-4 shows the location of the terminator resistors.

Figure 4-4

Terminator Resistor Locations

SCSI Terminators.

Remove in all but the last drive in the chain

Remove to

Disable TERMPWR

Input/Output

J1

E8

F1

J2

J3

SS

LED

J7

J5

J4

2107_4_4

TERMPWR

Fuse

NOTE: The TERMPWR output of the drive is protected by a 1 Ampere fuse. If external terminators are being powered from the drive and SCSI bus problems are suspected, verify that the fuse is still operational using a meter.



Cabling the Drive - CFP2105S

Connect the SCSI interface cable and the spindle synchronization cable (when needed) as shown in Figure 4-5.

Figure 4-5

Connecting the cabling

J1

E8

F1

J2

50-pin SCSI

Interface

Spindle

Synchronization

Connection

Key

J3

SS

LED

J7

LED

Connection

Pin 1 (typically indicated by a colored stripe on the cable

J4

J6

LED

Pin 1

2107_4_5

4-pin Power

Connector

OE6, LED Connection

SCSI Bus Cable

The cable and mating connector required to connect the drive to the SCSI bus are described in Chapter 5. In addition, the cable should meet the following guidelines, particularly with FAST SCSI-2 systems:

•

Do not route the data cable next to the drive PCB or any other high frequency or large current switching signals. Improper drive operation can result from improper cable routing.

•

Cable stubs should not exceed 0.1 meter (4 inches).

•

There should be 0.3 meters (12 inches) of cable between drives.

•

The total cable length should not exceed 6 meters (20 feet) and may have to be reduced if a mixture of round and flat cable are used.

•

Do not tightly bundle excess flat cable against each other since this promotes cross coupling of signals on the cable. Use spacers to maintain a minimum of

0.050 inches (1.27mm) gap between cable runs.

•

Do not clamp the cable tightly against a metal chassis since this will degrade the signal. Use spacers or a non-flammable insulation material to maintain a gap between the chassis and the cable.

Spindle Synchronization

The spindle rotation of up to 35 drives may be synchronized together by daisy chaining pin 1 to pin 1 and pin 2 to pin 2 on connector J3. Spindle

Synchronization is enabled by setting the appropriate bits in the RPL field of

Mode Select page 04. Refer to the Eleventh Generation Disk Drive SCSI-2

Interface Manual for a description of the command implementation. The synchronization tolerance is 1%.



Attaching Power to the Drive - CFP2105S

The drive has a 4-pin DC power connector, J4 mounted on the PCB. The recommended mating connector is AMP part number 1-480424-0 utilizing AMP pins, part number 350078-4 or equivalent.

Connect the DC Power cable to the drive as shown in Figure 4-5.

Attaching a Remote LED - CFP2107S

J3, pin 3 or J6 pin 10

J3, pin 4 or J6, pin 9

A remote LED can be attached using a 0.1

inch center, 2-pin connector to pins 3 and 4 of

J3. The anode of the LED should be connected to pin 3 and the cathode to pin 4.

An external LED can optionally be attached using a 2mm center connector on J6, pins 9 and 10 (location OE6). The anode of the LED should be connected to pin 10 and the cathode to pin 9.

The external LED is connected in parallel to the on board LED and is powered through a

200 ohm current limiting resistor to the +5 volt power.

Mounting the Drive - CFP2105S






Cooling

The enclosure design for the drive must provide adequate provision for removing heat generated by the drive via conduction or air flow convection cooling. The maximum operating temperature for the drive is 55°C. A temperature sensor


Installing the Drive Chapter 4 mounted on the drive at the location shown below should remain at or below


Recommended






Chapter 4

Installing a CFP2105W

Setting the Drive’s Jumpers - CFP2105W

Figure 4-6 shows you where to access the drive’s jumpers.

Figure 4-6

Jumper Locations

Installing the Drive

J1

J3

SS

LED

OE1

:

OE3

OE5, Disable

Spin

J6

LED

E8

J2

J5

J4

E7 (Disable Parity)

E1. . .E4

E6 (Delay Spin)

E5 (Disable Spin)

2107_4_6



Setting the SCSI Bus Address - CFP2105W

There are four jumpers available for configuration of the SCSI ID: E1, E2, E3 and E4.

The 68-pin unified connector includes a standard 2mm pitch auxiliary header which includes pins to allow remote selection of SCSI IDs. A receptacle connector Amp P/N 1-111623-7 or equivalent can be used to connect a ribbon cable to this header.

Table 4-11 defines the relationship between the jumpers or the pins on J5 and the SCSI ID:

Table 4-11


SCSI ID

11

12

13

14

15

7

8

9

10

5

6

3

4

0

1

2

E1 / Pin 1

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

Out/Open

In/Ground

E2 / Pin 3

Out/Open

Out/Open

In/Ground

In/Ground

Out/Open

Out/Open

In/Ground

In/Ground

Out/Open

Out/Open

In/Ground

In/Ground

Out/Open

Out/Open

In/Ground

In/Ground

E3 / Pin 5

Out/Open

Out/Open

Out/Open

Out/Open

In/Ground

In/Ground

In/Ground

In/Ground

Out/Open

Out/Open

Out/Open

Out/Open

In/Ground

In/Ground

In/Ground

In/Ground

Note: Open means open circuit or high impedance. Ground means

TTL logic low or logic ground. The odd numbered pins (lower row) are grounded and the even numbered pins carry the signal.

E4 / Pin 7

Out/Open

Out/Open

Out/Open

Out/Open

Out/Open

Out/Open

Out/Open

Out/Open

In/Ground

In/Ground

In/Ground

In/Ground

In/Ground

In/Ground

In/Ground

In/Ground



Disabling Spin-Up at Power On - CFP2105W

A jumper in the E5 location, disables spin up on power-on for applications where spin up sequencing is necessary. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00

H

(Vendor

Specific Parameters). The Host must issue a START UNIT command to cause the drive to spin up. Refer to the Eleventh Generation SCSI Technical


START/STOP UNIT commands. Refer to Figure 4-6 for the location of the

Disable Spin jumper E5 and the option header.

Table 4-12

Disabling Spin Up at Power On

E5 DSPN Result

In

In

Out

Out

0

1

0

1

Spin Disabled

Spin Disabled

Spin up on Power On

Spin Disabled


Delaying Spin Up at Power On - CFP2105W

A jumper in the E6 location, delays spin up on power-up by the value of the drive's SCSI ID multiplied by 4 seconds (i.e. SCSI ID 4 will delay 16 seconds).

Delaying spin up on application of power can also be enabled by setting the

SDLY bit in MODE SELECT page 00

H

(Vendor Specific Parameters). Refer to the Eleventh Generation SCSI Technical Reference Manual for additional information regarding the MODE SELECT command. Refer to Figure 4-6 for the location of the Delayed Spin jumper, E6.

Table 4-13


E6 SDLY Result

In

In

Out

Out

0

1

0

1

Spin Delayed

Spin Delayed

Spin up on Power On

Spin Delayed




Disabling the SCSI Bus Parity - CFP2105W

SCSI parity is always enabled in both directions, unless the E7 Parity disable jumper is installed. Setting the jumper will cause the drive to ignore SCSI bus parity in but it will continue to generate SCSI bus parity out.



Disabling SCSI Bus Terminator Power (TERMPWR) - CFP2105W

Power to the on-board terminators is provided by the higher of the voltage supplied at Pins #17, 18, 51 & 52, J2 or the voltage level at the 5 Volt power input to the drive minus one diode drop. Termination Power to external terminators can be supplied by the drive through Pins #17, 18, 51 & 52, J2. The signal output characteristics are described in chapter 5. The TERMPWR line can be disconnected from the drive by removing Jumper E8.

Table 4-14

Disabling SCSI Bus TERMPWR

Jumper E8

In

Out

Result

TERMPWR (J2, Pins #17, 18, 51 & 52) connected to the drive's internal termination power.

TERMPWR (J2, Pins #17, 18, 51 & 52) open circuit.

Using the J5 Auxiliary Connector

External logic cabled to the J5 connector may be used to control certain characteristics of the drive or access signals.

Table 5-15

J5 Auxiliary Connector Signal Definitions

Pin Number Signal Name

5

7

1

3

9

11

- SEL0

- SEL1

- SEL2

- SEL3

- ENTERM

+5V

Pin Number Signal Name

6

8

2

4

10

12

- XTFALT

- VUNIQ

- SPSYNC

- XTACTV

- GROUND

- FAULT

- SEL0

Bit 0 of the binary coded SCSI ID selection input. This signal has a value of 0 when it is negated and a value of 1 when it is asserted for the purpose of selection or arbitration.

This signal is latched within 250 msec of the application of valid power to the drive or optionally the negation of -RST.

If SCSI ID SEL0 is intended to be selected, the host must provide a low impedance connection from - SEL (0) to - XTFALT or to ground, while the ID is being latched, through an appropriate means. Refer to chapter 5 for specific electrical characteristics of these signals.



- XTFAULT

This signal is intended to drive an LED to indicate an external fault condition has occurred. This signal is held asserted following the application of power or optionally the negation of -RST during initialization while the SCSI ID is being read. This signal is not supported but meets the requirement of negating the signal while the ID is being read.

- SEL1



If SCSI ID SEL 1 is intended to be selected, the host must provide a low impedance connection from - SEL1 to - VUNIQ or to ground, while the ID is being latched, through an appropriate means. Refer to chapter 5 for specific electrical characteristics of these signals.

- VUNIQ

This signal is an open-collector output available for Vendor Unique usage. This signal is not supported but meets the requirement of negating the signal while the ID is being read.

- SEL2



If SCSI ID SEL2 is intended, to be selected, the host must provide a low impedance connection from - SEL2 to - SPSYNC or to ground, while the ID is being latched, through an appropriate means. Refer to chapter 5 for specific electrical characteristics of these signals.

- SPSYNC

This signal used to provide a spindle rotation synchronization reference. The pins for all of the drives which are to be synchronized must be connected together. The drives must be of like model to operate. The spindles are synchronized using a "floating master" concept, where the drives will synchronize to the first drive to reach full speed. The synchronization tolerance is 1%.

This signal meets the requirement of negating the signal while the ID is being read.



- SEL3



If SCSI ID SEL3 is intended, to be selected, the host must provide a low impedance connection from - SEL3 to - XTACTV or to ground, while the ID is being latched, through an appropriate means. Refer to chapter 5 for specific electrical characteristics of these signals.

- XTACTV

This signal is an open collector output intended to drive an LED to indicate the device is active. This signal is negated while the SCSI ID is being read.

- GROUND

This signal is connected to the drive's logic ground.

+5 Volts

This signal provides 5 volts of DC power to drive LEDs and is current limited by a 120 ohm resistor.

- FAULT

The assertion of this signal will cause the drive to stop any media-altering activity, which may result in the drive asserting -XTFALT or -VUNIQ, or both.

This signal is intended to be used as a power failure warning and/or as a write protect input. This signal is not supported by this drive.



Setting the Bus Termination - CFP2105W

This drive provides on board Alternative 2 active termination for the SCSI bus.

The termination resistors, which are contained in three Single Inline Packs

(SIPs) should be removed from the drive unless it is a SCSI device at the physical end of the bus. Figure 4-7 shows the location of the terminator resistors.

Figure 4-7

Terminator Resistor Locations

SCSI Terminators.

Remove in all but the last drive in the chain

Remove E8 to

Disable TERMPWR

Input/Output

J1

J3

SS

LED

J6

LED

E8

F1

J2

J5

J4

2107_4_7

TERMPWR

Fuse



Cabling the Drive - CFP2105W

Connect the SCSI interface cable and the spindle synchronization cable (when needed) as shown in Figure 4-8.

Figure 4-8

Connecting the cabling

J1

Spindle

Synchronization

Connection

LED

Connection

J3

SS

LED

E8

J2

J5

J4

68-pin

SCSI

Interface

Connection

Pin 1 (typically indicated by a colored stripe on the cable

Pin 1

2-mm Auxiliary

Connector

Pin 1

4-pin Power

Connection

J6

LED

2107_4_8

OE6, LED Connection

SCSI Bus Cable

The cable and mating connector required to connect the drive to the SCSI bus are described in Chapter 5. In addition, the cable should meet the following guidelines, particularly with FAST SCSI-2 systems:

•

Do not route the data cable next to the drive PCB or any other high frequency or large current switching signals. Improper drive operation can result from improper cable routing.

•

Cable stubs should not exceed 0.1 meter (4 inches).

•

There should be 0.3 meters (12 inches) of cable between drives.

•

The total cable length should not exceed 3 meters (10 feet) and may have to be reduced if a mixture of round and flat cable are used.

•

Do not tightly bundle excess flat cable against each other since this promotes cross coupling of signals on the cable. Use spacers to maintain a minimum of

0.050 inches (1.27mm) gap between cable runs.

•

Do not clamp the cable tightly against a metal chassis since this will degrade the signal. Use spacers or a non-flammable insulation material to maintain a gap between the chassis and the cable.



Mixing Wide and Narrow SCSI Devices on a SCSI Bus

It may sometimes be desirable to attach Narrow SCSI devices such as tape backup devices or CDROMs to the same SCSI Host Bus Adapter being used to control Wide SCSI devices, such as the CFP2105W. Intermixing of both Wide and Narrow SCSI devices on the same bus requires special considerations:

•

The Narrow SCSI devices must be placed at the physical end of the bus

•

The high byte of the SCSI data bus must be terminated at the transition adapter from the 34-pair wire to the 25-pair wire. Figure 4-9 shows the interconnection.

•

The cable impedance of the 34-pair wire and the 25-pair wire should be as closely matched as possible.

•

The 68-pair cable with 30 AWG wire uses four wires to carry TERMPWR, which must be joined to wire 26 of the 25-pair wire, if terminator power has to be carried over the cable.

Figure 4-9

Wide-to-Narrow Adapter

P Cable

Ground

TERMPWR

TERMPWR

TERMPWR

TERMPWR

Reserved

Reserved

-I/O

Ground

-DB(8)

Ground

-DB(9)

Ground

-DB(10)

Ground

-DB(11)

Ground

-DB (12)

Ground

-DB (13)

Ground

-DB (14)

Ground

-DB (15)

Ground

-DB(P1)

Ground

-DB (0)

Ground

64

65

66

67

68

60

61

62

63

36

37

38

32

33

34

35

7

8

5

6

9

10

11

12

13

1

2

3

4

I

N

A

T

O

R

R

M

T

E

M

I

N

A

T

E

R

T

O

R

A Cable

26

27

28

22

23

24

25

50

1

2

3

Ground

-DB (0)

Ground

Ground

Reserved

Reserved

Open

TERMPWR

Reserved

Reserved

-I/O

Spindle Synchronization

The spindle rotation of up to 35 drives may be synchronized together by daisy chaining pin 1 to pin 1 and pin 2 to pin 2 on connector J3. Spindle

Synchronization is enabled by setting the appropriate bits in the RPL field of

Mode Select page 04. Refer to the Eleventh Generation Disk Drive SCSI-2

Interface Manual for a description of the command implementation. The synchronization tolerance is 1%.



Attaching Power to the Drive - CFP2105W

The drive has a 4-pin DC power connector, J4, which is part of the Unified

Connector, mounted on the PCB. The recommended mating connector is AMP part number 1-480424-0 utilizing AMP pins, part number 350078-4 or equivalent.

Attaching a Remote LED - CFP2107W

J3, pin 3 or J6, pin 10 or J5, pin 11

A remote LED can be attached using a 0.1

inch center, 2-pin connector to pins 3 and 4 of

J3. The anode of the LED should be connected to pin 3 and the cathode to pin 4.

An external LED can optionally be attached using a 2mm center connector on J6, pins 9 and 10 (location OE6). The anode of the LED should be connected to pin 10 and the cathode to pin 9.

J3, pin 4 or J6, pin 9 or J5, pin 8

A external LED on J3 or J6 is connected in parallel to the on board LED and is powered through a 200 ohm current limiting resistor to the +5 volt power.

A third option is available on J5, which is between the 68-pin SCSI interface and the 4-pin power input on the unified connector. The anode can be connected to pin 11, which is connected to +5 volts through a 120 ohm current limiting resistor or an external current limited voltage source. The cathode is connected to pin 8.

Mounting the Drive - CFP2105W








Cooling

The enclosure design for the drive must provide adequate provision for removing heat generated by the drive via conduction or air flow convection cooling. The maximum operating temperature for the drive is 55°C. A temperature sensor mounted on the drive at the location shown below should remain at or below


Recommended








Interface Physical Characteristics

5

Electrical Description

The paragraphs which follow describe the input and output electrical characteristics of the drive.

Output Characteristics

The output drivers for Data, Parity, REQ and ACK are optionally active negation. When they are set for active negation, they have three states: asserted, negated and high impedance. The remainder of the signals have open collector (drain) outputs. The drivers maintain a high impedance state during power-on and power-off cycles. The driven signals have the following output characteristics when measured at the drive connector:

Table 5-1

Active Negation Driver Output Signal Characteristics

Signal Characteristic

Signal Assertion

Minimum Driver Output Capability

Signal Negation

Value

0.1 VDC to 0.5 VDC at 48 mA

48 mA (sinking) at 0.5 VDC


3.0 VDC at 20 mA

Table 5-2

Open Collector Driver Output Signal Characteristics


Signal Assertion

Minimum Driver Output Capability

Signal Negation

Value


48 mA (sinking) at 0.5 VDC

2.5 VDC to 5.25 VDC


Chapter 5 SCSI Physical Characteristics

Input Characteristics

The characteristics of the input receivers and the requirements for each signal received by the drive as measured at the drive connector are shown in table 5-3:

Table 5-3

Drive Input Signal Characteristics


Signal Assertion

Signal Negation

Input Load (low level)

Input Load (high level)

Value

0.0 VDC to 0.8 VDC

2.0 VDC to 5.25 VDC

-20

µ

A to 0.0 mA at 0.5 VDC

0.0 mA to 20

µ

A at 2.7 VDC

Model-Specific SCSI Physical Characteristics

The sections which follow describe, for each of the drive models, those SCSI characteristics which vary from model to model. These characteristics include:

•

Termination

•

Cable requirements

•

Connector requirements

•

Connector Pin assignments

•

Interface Timing requirements


SCSI Physical Characteristics Chapter 5

CFP2105E (WIDE, 80-pin Single Connector Attachment [SCA])

External Terminator Power

The interface connector carries both power and ground so a separate TERMPWR interface line is not provided.

Internal Termination

This version of the drive has no on-board termination so the drive must be externally terminated. Alternative 2 active termination is recommended.

Alternative 1 passive termination is not suitable for this application.

Cable Requirements

This version of the drive is designed to facilitate interfacing directly to a mating connector which is on a passive back plane or directly into a motherboard.

The design of the SCSI bus interconnect system should meet the following guidelines, particularly with FAST SCSI-2 systems:

•

Do not route the data signals next to any high frequency or large current switching signals. Unreliable drive operation can result from improper signal routing.

•

Signal line stubs should not exceed 0.1 meter (4 inches).

•

There should be 0.3 meters (12 inches) of transmission line between drives.

•

The total length of any signal line should not exceed 6 meters (20 feet) and may have to be reduced if excessive impedance discontinuities exist on the bus.

•

Maintain a minimum of 0.050 inches (1.27mm) gap between adjacent signal.runs to control crosstalk between signal lines.

•

Signals routed over a ground plane or between ground planes have different characteristic impedance. Signals with critical timing like REQ, ACK and

Data should be routed similarly.

The signal length between devices should either be spaced shorter than the stub length, which treats a group of devices as a lumped element, or far enough apart that a transmission line exists (0.3 meters or 12 inches). These signal length considerations should include the length of signal traces and connectors on the printed circuit board. The diagram below shows how it is possible to interconnect six 1-inch height drives over a relatively short length of interconnect.

3" [0.08m] maximum

12" [0.3m] minimum



Connector Requirements

The drive's connector will mate with a AMP Champ 2-557103-1 vertical receptacle or the AMP Champ 2-557101-1 right angle receptacle. A mating connector which is compatible with 0.025 inch (0.63 mm) centerline #30 AWG solid PVC insulation cabling is AMP Camp 1-557089-3. Refer to figure 2-1 for the location of the connector on the drive.

Single Connector Attachment (SCA) Signal Definitions

Power

Four +12 Volt signals provide the +12 volt power to the drive. The current return for the +12 volt power is through the +12 Volt Ground signals. The maximum current that can be provided to the drive through the +12 Volt signal pins is 3 Amperes. The supply current and return current must be distributed as evenly as possible among the pins. The maximum current is required while the drive motor is starting.

Three +5 Volt signal pins provide +5 volt power to the drive. The current return for the +5 volt power is through the +5 Volt Ground pins. It is expected that the

+5 Volt Ground will also establish the digital logic ground for the drive. The maximum current that can be provided to the drive through the +5 Volt signal pins is 2 Amperes. The supply current and return current must be distributed as evenly as possible among the pins.

These specifications refer to the connector's characteristics. Refer to Chapter 2 for the drive's power requirements.

Spindle Sync

The spindle rotation of up to 35 drives may be synchronized together by daisy chaining pin 1 to pin 1 and pin 2 to pin 2 of each drive on connector J3. The synchronization tolerance is 1%.

Table 5-4

Electrical Characteristics for the Spindle Sync Signal

STATE

High

Low

Current

0 < I

IH

< 20

µ

A

0 < I

OH

< -48 mA

Voltage

2.5 V < V

IH

< V

CC

-0.1 V < V

IL

+ 0.3 V

< 0.4 V



LED Out

The LED out signal is driven by the drive when the drive is performing a SCSI operation. The LED out signal is designed to pull down the cathode of an LED.

The anode is attached to the proper +5 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are external to the drive.

Table 5-5

Output Characteristics of the LED Driver Signal

Output Voltage State

Drive LED Off

Drive LED On

Current Drive Available

0 < I

OH

< 100

µ

A

I

OL

< -30 mA 0 < V

OL

< 0.8 Volts

Motor Start Controls

Table 5-6

Electrical Characteristics for RMT_START and DLYD_START

State

Open

Ground

Current

0 < I

IH

< +100

µ

A

0 < I

OH

< -3 mA

Voltage

2.4 V < V

IH

< V

CC

+ 0.5 V

-0.5 V < V

IL

< 0.4 V

SCSI ID Selection

Table 5-7

Electrical Characteristics for the SCSI ID Signals SCSI ID (0) - (3)

State

Open

Ground

Current

0 < I

IH

< +100

µ

A

0 < I

OH

< -3 mA

Voltage

2.4 V < V

IH

< V

CC

+ 0.5 V

-0.5 V < V

IL

< 0.4 V



Interface Pin Assignments

The pin assignments for the interface connector are shown below:

Table 5-8

Interface Signal Definitions

Pin

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

Notes:

1. The minus sign (-) indicates active low.

2. Pins marked Reserved are not connected.

Signal

-ACK

-BSY

-ATN

-DB(P0)

-DB(7)

-DB(6)

-DB(5)

-DB(4)

-DB(3)

-DB(2)

-DB(1)

-DB(0)

-DB(P1)

-DB(15)

-DB(14)

-DB(13)

+12 Volt

+12 Volt

+12 Volt

+12 Volt

Reserved / NC

Reserved / NC

-DB(11)

-DB(10)

-DB(9)

-DB(8)

-I/O

-REQ

-C/D

-SEL

-MSG

-RST

-DB(12)

+5 Volt

+5 Volt

+5 Volt

SYNC

RMT_START

SCSI ID (0)

SCSI ID (2)

Pin

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

Signal

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

+12 Volt Ground

+12 Volt Ground

+12 Volt Ground

+12 Volt Ground

Reserved / NC

Reserved / NC

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

+5 Volt Ground

+5 Volt Ground

+5 Volt Ground

LED

DLYD_START

SCSI ID (1)

SCSI ID (3)



Interface Timing Requirements

Unless otherwise noted, the delay-time measurements are calculated from signal conditions existing at the drive's own SCSI bus connector. Normally these measurements (except cable skew delay) can be made without considering delays in the inter-connect system.

Table 5-9

SCSI Bus Timing Values

Timing Description

Arbitration Delay

Bus Clear Delay

Bus Free Delay

Bus Set Delay

Bus Settle Delay

Cable Skew Delay

1

Data Release Delay

Receive Assertion Period

Receive Hold Time

Receive Negation Period

Receive Setup Time

Reset Hold Time

Selection Abort Time

Selection Time-out Delay

2

System Deskew Delay

Transmit Assertion Period

Transmit Hold Time

Transmit Negation Period

Transmit Setup Time

fast

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

22 ns

25 ns

22 ns

15 ns

25

µ s

200

µ s

250 ms

20 ns

30 ns

33 ns

30 ns

23 ns

Timing Value slow

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

70 ns

25 ns

70 ns

15 ns

25

µ s

200

µ s

250 ms

45 ns

80 ns

53 ns

80 ns

23 ns

asynch

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns n/a n/a n/a n/a

25

µ s

200

µ s

250 ms


Notes:

1

This time does not apply at the SCSI connector of the drive.

2

This is a recommended time. It is not mandatory.



Model CFP2105S (Narrow, 50-pin SCSI)


Power to the on-board terminators is provided by the higher of the voltage supplied at Pin #26, J2 or the voltage level at the 5 Volt power input to the drive minus one diode drop. The diode prevents back flow of current to the drive.

Termination Power to external terminators can be supplied by the drive through

Pin #26, J2. The TERMPWR line can be disconnected from the drive by removing Jumper E8. Table 5-10 describes the electrical characteristics of the

TERMPWR line when it is used to supply power to an external terminator.

Table 5-11 describes the required electrical characteristics for any external source of termination power.

Table 5-10

TERMPWR Output Electrical Characteristics


Supply voltage

Minimum source capability:

Value

4.06 VDC to 4.56 VDC

800 mA (fused at 1000 mA)

Table 5-11

TERMPWR Input Electrical Characteristics


Input voltage


Sink current:

Value



1.0 mA maximum, excluding power to the internal terminator.



The termination resistors, which are contained in two Single Inline Packs (SIPs) should be removed from the drive unless it is a SCSI device at a physical end of the bus. The terminator equivalent circuit is shown below for reference:

Figure 5-1

Terminator Equivalent Circuit

+5V

TERMPWR

E8

F1

Voltage

Regulator

2.5K

10K

110

-DB0

-DB1

-DB2

: :

: :

: :

-REQ

-I/O




A 50 conductor cable no more than 6 meters (19.68 feet) cumulative length with at least 28 AWG wire size and a characteristic impedance of 70 to 100 ohms (84 ohms nominal) is required. In systems which use the fast synchronous transfer option, the cable should meet the following additional requirements:

Table 5-12

Interface Cable Electrical Characteristics

Specification

Signal Attenuation

Pair-to-Pair Propagation Delay Delta

DC Resistance

Value

0.095dB maximum per meter at 5 Mhz

0.20 ns maximum per meter

0.230 ohms maximum per meter at 20

°

C




The connector on the drive is a 50-position header which consists of 2 rows of 25 male pins on 0.100 inch centers. The mating connector is a SCSI-2 Non-shielded

Alternative 1, A-cable connector which is shown below:

Figure 5-2

A-Cable Connector

Contact 50

C1

Back view

C4

Contact 1

C3

C2

See Note 1

Contacts for even wires are not shown.

Side view

C5

C6

Socket 1

Socket 49

C7

Front view

C8

Socket 2

Socket 50

Dimensions Millimeters Inches

C5

C6

C7

C8

C1

C2

C3

C4

2.540

60.960

2.540

3.302

32.385

68.072

6.096

7.620

0.100

2.400

0.100

0.130

1.275

2.680

0.240

0.300

Notes:

(1) Fifty contacts on 1.27mm (0.05

inch) staggered spacing =

62.23mm (2.450 inch) [ref.]

(2) Tolerances +0.127mm (0.005

inch) noncumulative unless specified otherwise.

(3) Connector cover and strain relief are optional


SCSI Physical Characteristics



Pin

09

11

13

15

17

01

03

05

07

19

21

23

25

27

29

31

41

43

45

47

49

33

35

37

39

Table 5-13


Signal

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

RESERVED

OPEN

RESERVED

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

Pin

10

12

14

16

18

02

04

06

08

20

22

24

26

28

30

32

42

44

46

48

50

34

36

38

40

Signal

-DB0

-DB1

-DB2

-DB3

-DB4

-DB5

-DB6

-DB7

-DBP

GND

GND

RESERVED

TERMPWR

RESERVED

GND

-ATN

GND

-BSY

-ACK

-RST

-MSG

-SEL

-C/D

-REQ

-I/O

Notes:


2. All odd pins except pin 25 must be connected to ground. Pin 25 is left open.

3. Pins marked Reserved are connected to ground.

Chapter 5




Unless otherwise noted, the delay-time measurements are calculated from signal conditions existing at the drive's own SCSI bus connector. Normally these measurements (except cable skew delay) can be made without considering delays in the cable.

Table 5-14




Bus Clear Delay

Bus Free Delay

Bus Set Delay



1






Reset Hold Time



2






fast

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

22 ns

25 ns

22 ns

15 ns

25

µ s

200

µ s

250 ms

20 ns

30 ns

33 ns

30 ns

23 ns


2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

70 ns

25 ns

70 ns

15 ns

25

µ s

200

µ s

250 ms

45 ns

80 ns

53 ns

80 ns

23 ns

asynch

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns


25

µ s

200

µ s

250 ms


Notes:

1


2




Model CFP2105W (Wide, Unitized SCSI-3 P-Connector)


Power to the on-board terminators is provided by the higher of the voltage supplied at Pin #17, 18, 51, & 52, J2 or the voltage level at the 5 Volt power input to the drive minus one diode drop. The diode prevents back flow of current to the drive. Termination Power to external terminators can be supplied by the drive through Pin #17, 18, 51, & 52, J2. The TERMPWR line can be disconnected from the drive by removing Jumper E8. Table 5-11 describes the electrical characteristics of the TERMPWR line when it is used to supply power to an external terminator.

Table 5-15

TERMPWR Electrical Output Characteristics


Supply voltage


Value


(dependent on power supplied to the drive)

1500 mA

Table 5-16

TERMPWR Input Electrical Characteristics


Input voltage


Sink current:

Value



1.0 mA maximum, excluding power to the internal terminator.



The termination resistors, which are contained in three Single Inline Packs

(SIPs) should be removed from the drive unless it is a SCSI device at a physical end of the bus. The terminator equivalent circuit is shown below for reference:

Figure 5-2

Terminator Equivalent Circuit

+5V

TERMPWR

E8

F1

Voltage

Regulator

2.5K

10K

110

-DB0

-DB1

-DB2

: :

: :

: :

-REQ

-I/O



J5 Auxiliary Connector Signal Characteristics

Table 5-17

J5 Auxiliary Interface Electrical Characteristics

High

Low

State Current

0 < I

IH

< 20

µ

A

0 < I

OH

< -48 mA

Voltage

2.5 V < V

IH

< V

CC

+ 0.3 V

-0.1 V < V

IL

< 0.4 V


A 68 conductor cable no more than 3 meters (9.84 feet) cumulative length with at least 30 AWG wire size and a characteristic impedance of 70 to 100 ohms (84 ohms nominal) is required. In systems which use the fast synchronous transfer option, the cable should meet the following additional requirements:

Table 5-18

Interface Cable Electrical Characteristics

Specification

Signal Attenuation

Pair-to-Pair Propagation Delay Delta

DC Resistance

Value

0.095dB maximum per meter at 5 Mhz

0.20 ns maximum per meter

0.230 ohms maximum per meter at 20

°

C




The connector on the drive is a 68-pin . The mating connector is a SCSI 3 Nonshielded P-cable connector which is shown below:

Figure 5-4

P-Cable Connector

T

A13

A16 R

A8

A14 A15

A9

M

T V S W S

A10

A11

M T V S W S

PIN 1

A1

W

A12

PIN 68

A6

PIN 34

A3

A2

V

DIMENSIONS

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

Technical Reference Manual

PIN 35

A7

Millimeters

46.28

5.69

2.54

1.27

41.91

15°

1.04 R

0.396 + 0.010

0.23

0.60 + 0.03

0.23

0.05

5.15 + 0.15

4.39 MAX

A4

A5

Inches

1.822

0.224

0.100

0.050

1.650

15°

0.041 R

0.0156 + 0.0004

0.009

0.024 + 0.001

0.009

0.002

0.203 + 0.006

0.173 MAX

Page 67

Chapter 5

A15

A16

3.02 MIN

1.02 + 0.25

0.119 MIN

0.040 + 0.010






Table 5-19


Pin

21

22

23

24

25

17

18

19

20

26

27

28

29

30

31

32

33

34

7

8

9

5

6

3

4

1

2

10

11

12

13

14

15

16

Signal

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

Ground

TERMPWR

TERMPWR

Reserved

Ground

Ground

Notes:


2. Pins marked Reserved are not connected.

Pin

55

56

57

58

59

51

52

53

54

60

61

62

63

64

65

66

67

68

39

40

41

42

43

35

36

37

38

44

45

46

47

48

49

50

Signal

-DB(12)

-DB(13)

-DB(14)

-DB(15)

-DB(P1)

-DB(0)

-DB(1)

-DB(2)

-DB(3)

Ground

-BSY

-ACK

-RST

-MSG

-SEL

-C/D

-REQ

-I/O

-DB(8)

-DB(9)

-DB(10)

-DB(11)

-DB(4)

-DB(5)

-DB(6)

-DB(7)

-DB(P)

Ground

Ground

TERMPWR

TERMPWR

Reserved

Ground

--ATN

Chapter 5




Unless otherwise noted, the delay-time measurements are calculated from signal conditions existing at the drive's own SCSI bus connector. Normally these measurements (except cable skew delay) can be made without considering delays in the cable.

Table 5-20




Bus Clear Delay

Bus Free Delay

Bus Set Delay



1






Reset Hold Time



2






fast

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

22 ns

25 ns

22 ns

15 ns

25

µ s

200

µ s

250 ms

20 ns

30 ns

33 ns

30 ns

23 ns


2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns

400 ns

70 ns

25 ns

70 ns

15 ns

25

µ s

200

µ s

250 ms

45 ns

80 ns

53 ns

80 ns

23 ns

asynch

2.4

µ s

800 ns

800 ns

1.8

µ s

400 ns

4 ns


25

µ s

200

µ s

250 ms


Notes:

1


2





SCSI Command Implementation

6

This section contains a brief summary of the SCSI Interface implemented in the drive. For additional details regarding command descriptions, please refer to the Eleventh Generation SCSI Interface Manual.

SCSI Command Summary

Following is a list of commands that the drive supports:

Format Unit

Inquiry

Mode Select

Mode Sense

Read (6)

Read Buffer

Read Capacity

Read Defect Data

Read Extended (10)

Read Long

Reassign Blocks

Receive Diagnostics

Release

Request Sense

Reserve

Re-zero Unit

Seek (6)

Seek Extended (10)

Send Diagnostic

Start/Stop Unit

Test Unit Ready

Verify

Write (6)

Write Extended (10)

Write and Verify

Write Buffer

Write Long

1DH

1BH

00H

2FH

0AH

2AH

2EH

3BH

3FH

1CH

17H

03H

16H

01H

0BH

2BH

04H

12H

15H

1AH

08H

3CH

25H

37H

28H

3EH

07H

Drive Dependent SCSI Mode Sense Data

The following pages show the drive dependent Mode Sense information for this drive. The default values are noted in parenthesis (). Parameters not specified are 00

H

.


Chapter 6

Page 74

SCSI Command Implementation

Vendor Specific Parameters Page - 00

H

The Vendor Specific Parameters Page contains options that allow the drive's power-on reset sequences to be modified. Only one copy of this page is maintained, thus modifications to this page affects all initiators.

Table 7-12

Vendor Specific Parameters Page Format

Bit

Byte

7 6 5 4

0

Reserved Page Code = 00

H

3

1

2

3

Page Length = 2

H

DINR

(0)

DSPN

(0)

Delay Time

(00)

DAD

(0)

DUA

(0)

Rsvd

(0)

2

Rsvd

(0)

1 0

TSYN

(0)

SDLY

(0)

DINR (Disable Immediate Not Ready): When this bit is zero, any command received by the drive while it is spinning up returns a CHECK CONDITION status to the host. A subsequent REQUEST SENSE command will return a

NOT READY.

When this bit is a one, a TEST UNIT READY command reports GOOD status.

Any other command will cause the drive to accept the command, disconnect, wait until the drive is up to speed and ready, then execute the command, re-connect and complete the command.

DSPN (Disable Motor Spin-Up): When set to zero, it indicates that motor spin-up at power-on is enabled. When set to one, it indicates that motor spin-up at power-on is disabled.

DAD (Disable Automatic Disconnects): This bit has impact only when the drive is operating in its READ-AHEAD mode of operation. When set to zero, the drive will automatically disconnect from the SCSI bus when receiving a WRITE command. When DAD is set to one and WCE is set to zero, the drive will immediately start to accept write data without first disconnecting from the SCSI bus. When DAD is set to one, WCE is set to one, and a previous write command’s data has been accepted and GOOD status reported, the drive will immediately accept write data if the request is perfectly sequential to the previous WRITE.

DUA (Disable Unit Attention): When set to zero, a CHECK CONDITION status with a sense key of UNIT ATTENTION occurs for each initiator following a bus reset, a BUS DEVICE RESET message or a power-on reset. When set to one, presentation of a CHECK CONDITION status for the UNIT ATTENTION condition is disabled.

TSYN (Target Initiate Synchronous Negotiation): When set to zero, the drive cannot initiate synchronous transfer negotiations. When set to one, the drive can initiate synchronous transfer negotiation, if necessary.


SCSI Command Implementation Chapter 6

SDLY (Spin Up Delay): When set to zero, the spin up occurs when power is applied to the drive. When set to one, the spin up is delayed at power-on by the value of the drive's SCSI ID times 4 seconds (i.e., SCSI ID 4 will delay 16 seconds).

Delay Time: When set to a value other than zero, specifies the spin up delay constant used to multiply with the SCSI ID to determine the spin up delay when

SDLY is set to one. A value of 40H is equal to 4 seconds, which is also the default value if Delay Time is set to zero.


Chapter 6

Page 76


Format Drive Page - 03H

The Format Drive page contains parameters which specify the medium format.

Table 6-1

Format Drive Page Format

Byte

Bit

7 6 5 4 3 2 1

8

9

6

7

10

0

1

2

3

4

5

11

12

13

14

15

16

17

18

19

20

21-23

Rsvd Rsvd Page Code = 03

H

Page Length = 16

H

Tracks per Zone (MSB)

(00

H

)

Tracks per Zone (LSB)

(01

H

)

Alternate Sectors per Zone (MSB)

(00

H

)

Alternate Sectors per Zone (LSB)

(01

H

)

Alternate Tracks per Zone (MSB)

Alternate Tracks per Zone (LSB)

Alternate Tracks per Logical Unit (MSB)

Alternate Tracks per Logical Unit (LSB)

SSEC HSEC

(1)

Sectors per Track (MSB)

(00

H

)

Sectors per Track (LSB)

(8C*

H

)

Data Bytes per Physical Sector (MSB)

(02

H

)

Data Bytes per Physical Sector (LSB)

(00

H

)

Interleave (MSB)

(00

H

)

Interleave (LSB)

(01

H

)

Track Skew Factor (MSB)

(00

H

)

Track Skew Factor (LSB)

(05

H

)

Cylinder Skew Factor (MSB)

(00

H

)

Cylinder Skew Factor (LSB)

(45

H

)

RMB SURF Reserved

Reserved

* Varies depending on active notch.

0

Tracks Per Zone: Defines the number of tracks per zone to use in dividing the capacity of the drive for the purpose of allocating alternate sectors. A value of zero means that one zone is defined for the entire drive.



Alternate Sectors Per Zone: Defines the number of spare sectors per zone the drive reserves for defect handling. Not supported. Must be set to zero.

Alternate Tracks Per Logical Unit: Not supported. Must be set to zero.

Sectors Per Track: Defines the number of physical sectors per track. The number includes the one alternate sector per track the drive allocates. The value reported for the number of sectors per track is dependent on the active notch value.

Data Bytes Per Physical Sector: Defines the number of data bytes per physical sector.

Interleave: Defines the interleave value used by the drive.

Track Skew Factor: Defines the number of physical sectors between the last logical block of one track, and the first logical block on the next sequential track of the same cylinder.

Cylinder Skew Factor: Specifies the number of physical sectors between the last logical block of one cylinder and the first logical block on the next sequential cylinder.

SSEC (Soft Sector Format): Set to zero to indicate the drive does not support a soft sector format.

HSEC (Hard Sector Format): Set to one to indicate the drive supports a hard sector format.

RMB (Removable Media): Set to zero to indicate the drive does not have removable media.

SURF (Surface Format): The SURF bit is set to zero, meaning the drive allocates progressive addresses to all logical blocks within a cylinder prior to allocating addresses on the next cylinder.


Chapter 6 SCSI Command Implementation

Drive Geometry Page - 04

H

Table 6-2

Drive Geometry Page

Bit

Byte

7 6 5

9

10

11

0

1

2

3

4

5

6

7

8

4 3 2 1

Rsvd Rsvd Page Code = 04H

Page Length = 16

H

Number of Cylinders (MSB)

(00

H

)

Number of Cylinders

(0F

H

)

Number of Cylinders (LSB)

(64

H

)

Number of Heads

(0A

H

)

Starting Cylinder - Write Precompensation (MSB)

(00

H

)

Starting Cylinder - Write Precompensation

(00

H

)

Starting Cylinder - Write Precompensation (LSB)

(00

H

)

Starting Cylinder - Reduced Write Current (MSB)

Starting Cylinder - Reduced Write Current

Starting Cylinder - Reduced Write Current (LSB)

15

16

17

12

13

14

Drive Step Rate (MSB)

Drive Step Rate (LSB)

Landing Zone Cylinder (MSB)

Landing Zone Cylinder

Landing Zone Cylinder (LSB)

Reserved

0

RPL

(0

H

)

18

19

Rotational Offset

Reserved

20

21

22-23

Medium Rotation Rate (MSB)

(15

H

)

Medium Rotation Rate (LSB)

(18

H

)

Reserved


Only one copy of this page is maintained. There is only one changeable field,

RPL. All other fields are described in the MODE SENSE Command.



RPL (Rotational Position Locking): Enables spindle synchronization.

Setting either bit 0 or 1, or both, causes multiple drives which have their spindle synchronization (SS) pins daisy chained together to synchronize their spindles.

Notch and Partition Parameters Page - 0C

H

The Notch and Partition Parameters Page contains information which pertains to each notch of the drive. Each section of the drive with a different number of logical blocks per cylinder is referred to as a notch or zone. Only one copy of this page is maintained. The only changeable field in this page is Active Notch.


Chapter 6

Page 80


Table 6-3

Notch and Partition Parameters Page Format

Bit

Byte

7 6 5 4 3

Rsvd Rsvd

0

1

2

ND

(1)

LPN

2

Page Code - OCH

Page Length = 16H

Reserved

1

3

Reserved

4

5

6

7

(0

Maximum Number of Notches (MSB)

(00

H

)

Maximum Number of Notches (LSB)

(0F

H

)

H

)

Active Notch (MSB)

(00

H

)

Active Notch (LSB)

(1*

H

)

8

9

10

11

12

13

14

15

Starting Boundary (MSB)

(00*

H

)

Starting Boundary

(00*

H

)

Starting Boundary

(08*

H

)

Starting Boundary (LSB)

(00*

H

)

Ending Boundary (MSB)

(00*

H

)

Ending Boundary

(01*

H

)

Ending Boundary

(71*

H

)

Ending Boundary (LSB)

(00*

H

)

Pages Notched (MSB)

Pages Notched

16

17

18

19

20

3F

37

2F

27

1F

Pages Notched

Pages Notched

Pages Notched

21

17 Pages Notched

22

0F

Pages Notched

(10

H

)

23

07

Pages Notched (LSB)

(08

H

)


0

38

30

28

20

18

10

08

00



ND (Notched Drive): If set to zero, the drive is not notched and all other parameters in this page are returned as zeros. If set to one, the drive is notched and this page defines the starting and ending boundaries for each active notch.

This parameter is always set to one.

LPN (Logical or Physical Notch): When set to zero, indicates the notch boundaries are physical addresses (i.e., cylinder and head). An LPN bit of one is not supported.

The Maximum Number of Notches field indicates the maximum number of notches supported by the drive.

The Active Notch field indicates which notch is being referred to by this and subsequent MODE SELECT and MODE SENSE commands, until changed by a later MODE SELECT command. Active notches are numbered beginning from one up to the maximum number of notches.

The Starting Boundary field indicates the beginning of the active notch; the three most significant bytes represent the cylinder number and the least significant byte represents the head number.

The Ending Boundary field indicates the ending of the active notch; the three most significant bytes represent the cylinder and the least significant byte represents the head number.

The Pages Notched field is a bit map of the MODE SELECT page codes which indicates the pages containing parameters that are changed for different notches. The most significant bit of this field corresponds to page code 3F and the least significant bit represents page code 0. If a bit is a one, the corresponding MODE SELECT page contains parameters that are changed for different notches. If a bit is a zero, the corresponding MODE SELECT page parameters are constant for all notches.


Previous

Pre-Release

Revision A

October 1994

Revision

Current

Revision A

June 1995

Description

• deleted reference to spindle synchronization

• changed sector sizes supported to 512 & 1024

• eliminated reference to e-coating on page 4.

• corrected controller overhead definition

• updated power consumption specification per DVT.

• updated drawings and dimensions of drive to match

23311-001 rev Y5.

Date

6/95


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