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1
Getting Started
This Installation Guide explains how to install and configure the AVA
™
-2825 host adapter. The
AVA-2825 combines support for both IDE and Fast
SCSI on one VL-Bus
™
host adapter. This allows you to benefit from the flexibility of Fast SCSI and the fast data transfer rate of advanced IDE hard disk drives, while using only one VL-Bus slot in your PC.
You can connect one or two IDE drives to the
AVA-2825. You can also connect up to seven SCSI devices and two floppy disk drives. AVA-2825 host adapters are designed for VL-Bus PCs with a 486
™ or higher microprocessor.
To get the fastest data transfer rate from your enhanced IDE disk drives, you need to install the
FLEXI-Driver
™
software included with your
AVA-2825 host adapter. The FLEXI-Driver Installa-
tion Guide explains how to do this.
2
Host Adapter Layout
This diagram identifies the major AVA-2825 components. The following table describes each component.
J1 J2 S1 J3 J4 J5
J7 U12
Location Description
J1
J2
External LED Connector
IDE Connector
J3
J4
Floppy Drive Connector
Internal SCSI Connector
Location Description
J5
J7
External SCSI Connector
SCSI I/O Port Jumper
S1
U12
Switch Block
Host Adapter BIOS ROM
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Default Settings
The AVA-2825 default settings are as follows:
Parameter
Host Adapter Interrupt Channel
Host Adapter SCSI ID
SCSI Parity Checking
Host Adapter Termination
Host Adapter BIOS Address
Enable Sync Negotiation
Enable FAST SCSI
Enable Disconnection
System Boot (INT 19h) Controlled by Host
Adapter BIOS
Default Setting
IRQ 11
7
Enabled
Enabled
DC000h
Enabled
Enabled
Enabled
Enabled
Extended BIOS Translation for Drives >1 GByte Disabled
BIOS Support for Floptical Drives Disabled
SCSI I/O Port Address
IDE Data Transfer Speed
Floppy Drive Controller
340h–35Fh
3.3 MBytes/sec
Enabled
1
1
This is the IDE Mode 0 data transfer rate. You can achieve higher IDE data transfer rates if you have an enhanced IDE disk drive and you install the FLEXI-Driver software.
■
■
■
Many of these settings can be changed with the
SCSISelect configuration utility. See Configuring
the Host Adapter on page 8 for more information.
For information on changing the SCSI I/O port address, see Changing the SCSI I/O Port Address on page 4.
For information on changing the BIOS address and the floppy drive controller setting, see the table on page 3.
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4
Installing the Host Adapter
Changing Switches and Jumpers
This table shows all the possible settings of the
AVA-2825 switch block (s1). Default settings are marked with an asterisk (*).
Floppy Drive Controller
Enabled*
Disabled
IDE
Enabled*
Disabled
BIOS Address
DC000h*
C8000h
CC000h
D8000h sw3
On
Off
Off
On sw1
On
Off sw2
Off
On sw4
On
Off
On
Off
If you need to change switch settings or the setting of jumper J7, do it now before you install the host adapter. Here are some possible reasons for changing the settings:
Disabling the Floppy Controller
Only one floppy controller can be enabled in your
PC. If you leave the floppy drive cable attached to the PC’s built-in floppy controller, turn sw1 Off to
disable the AVA-2825 floppy controller. If you connect the floppy drive cable to the host adapter, you must disable the PC’s floppy controller. (The PC’s floppy controller may be on a separate option card or on the PC motherboard. See the PC documentation.)
Disabling the IDE Controller
Only one IDE controller can be enabled in your PC. If you leave the IDE cable attached to the PC’s IDE controller, turn sw2 On to disable the AVA-2825 IDE controller. If you connect the IDE cable to the AVA-2825, you must disable the PC’s IDE controller. (The IDE controller may be on a separate option card or on the
PC motherboard. See the PC documentation.)
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Changing the SCSI I/O Port Address
The AVA-2825 SCSI I/O port address is set by jumper block J7. The default port address is 340h-35Fh. You can change the SCSI I/O port address to its alternate setting of 140h-15Fh if it conflicts with another option board in your PC. For example, if you install two AVA-2825 host adapters in your PC, you must change one host adapter’s SCSI I/O port to the alternate address.
To change the SCSI I/O port address, locate jumper block J7 and remove the jumper shunt from pins 1 and 2 (the default setting). Then place the jumper shunt on pins 2 and 3, as shown in this diagram:
Default I/O Port Address Alternate I/O Port Address
1 2 3 1 2 3
Inserting the Host Adapter in a Slot
WARNING: Turn OFF and disconnect the power to your PC and attached devices before you remove the chassis cover. See the
PC documentation for instructions.
1 Remove the PC’s chassis cover to expose the expansion slots and expansion slot covers.
2 Locate an unused VESA
®
local bus (VL-Bus) expansion slot. VL-Bus slots are longer than ISA slots, as shown in the diagram below:
Expansion slot covers
VL-Bus slots
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3 Remove the corresponding expansion slot cover from the PC chassis.
4 Align the bus connector on the bottom of the host adapter with the VL-Bus slot and carefully press it down into the slot. Secure the host adapter bracket to the PC chassis with the screw from the removed expansion slot cover.
Note: Do not replace the chassis cover or reconnect the power yet!
5
Connecting SCSI Peripheral Devices
Caution: AVA-2825 host adapters support only single-ended SCSI devices. Do not connect differential SCSI devices to this host adapter. Read the documentation to determine whether a device supports singleended or differential SCSI.
Connecting Cables
SCSI devices are cabled together in a single, connected series called the SCSI bus. SCSI cables must run sequentially from one device to the next, with no branching.
1 Lay out the cables and find the pin-1 element of each cable and peripheral connector.
On internal cables, pin 1 is usually marked with a contrasting color on one edge of the ribbon cable, and a small triangle marks pin 1 on the SCSI connector. External cables can only be plugged in one way, so pin-1 orientation is automatic.
2 Attach the SCSI cable(s) to the host adapter and the peripheral device(s), using the internal and/ or external connector(s).
Be sure to maintain correct pin-1 orientation throughout the bus. The AVA-2825 uses a 50-pin high-density external connector, and a 50-pin flat ribbon-type internal connector.
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Terminating SCSI Devices
The last peripheral device at each end of the SCSI bus must have a set of resistors called terminators installed or enabled. Terminators must be removed from, or disabled on, other devices in the middle of the SCSI bus. The AVA-2825 and most SCSI peripherals have built-in terminators that can be enabled or disabled.
Terminating the Host Adapter
Termination is enabled by default on AVA-2825 host adapters. You must disable host adapter termination if you attach SCSI devices to both the internal and external SCSI connectors.
The table below lists possible SCSI device/host adapter configurations.
Devices Connected to Host Adapter
Internal devices only
(host adapter at end of bus)
External devices only
(host adapter at end of bus)
Internal and external devices
(host adapter in middle of bus)
Host Adapter Termination
Enabled
Enabled
Disabled
AVA-2825 SCSI termination is controlled by the
SCSISelect program. If you need to disable host adapter termination, first complete the physical installation, then run SCSISelect and follow the directions in Configuring the Host Adapter on page 8.
Terminating Other SCSI Peripherals
1 Install/enable terminators on SCSI devices at the
ends of the SCSI bus (cable).
Check the manufacturer's documentation to determine how to enable or disable termination on SCSI disk drives and other SCSI peripheral devices.
2 Remove/disable terminators on all devices in the middle of the SCSI bus.
3 Be sure the SCSI cables are connected securely.
They may have been knocked loose if you changed jumpers or switch settings on the peripheral devices.
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Setting SCSI IDs
Be sure that each device on the AVA-2825 SCSI bus has a different SCSI ID. See your SCSI peripheral documentation to learn how to determine the SCSI ID and change it.
■
The default SCSI ID for the AVA-2825 host adapter is SCSI ID 7. You can change the ID with the SCSISelect utility, if necessary. (See Configuring
the Host Adapter on page 8.)
■
We recommend that you assign SCSI IDs 0 and 1 to the first two SCSI hard disk drives in your PC.
6
Connecting Floppy Drives
Follow these steps if you are connecting your PC’s floppy disk drives to the AVA-2825 onboard floppy controller:
1 Disconnect the 34-pin floppy ribbon cable from the PC’s floppy controller.
2 Connect the floppy ribbon cable to the host adapter ’s onboard floppy connector. Be sure to maintain pin-1 orientation.
3 Disable the PC’s floppy controller. See page 3 for more information.
7
Connecting IDE Drives
Follow these steps if you are connecting IDE disk drives to the AVA-2825 IDE controller:
1 If the IDE drives are already installed in your PC, disconnect the 40-pin IDE ribbon cable from the
PC’s IDE controller.
If you are installing new IDE drives, connect the
IDE cable to the drives, as described in the drive manufacturer’s documentation.
2 Connect the end of the IDE ribbon cable securely to the AVA-2825 onboard IDE connector. Be sure to maintain pin-1 orientation.
3 Disable the PC’s IDE controller. See page 3 for more information.
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Keep these points in mind when installing IDE drives:
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Your PC can recognize two physical IDE disk drives when they are connected to the AVA-2825.
The first IDE drive must be set up as the master drive (drive C) in CMOS
setup
, and the second
IDE drive (if any) as the slave drive.
■
■
■
If your PC has both IDE drives and SCSI drives, it always boots from the IDE drive designated as drive C.
IDE drives larger than 528 MBytes may require a disk partitioning utility for use under DOS. The utility is usually available from the drive manufacturer or the dealer.
You need to install FLEXI-Driver to attain the highest data transfer rate from enhanced IDE drives. See the FLEXI-Driver Installation Guide.
8
Reassembling and Starting the PC
1 Put the chassis cover back on the PC, following the instructions in the PC documentation.
2 Be sure all power switches are OFF , then reconnect power cables to the PC.
3 Turn ON the power for the PC and the peripheral device(s).
When the PC boots, the host adapter BIOS sign-on message appears on the screen. This message lists installed SCSI devices and BIOS information. In most cases your PC, host adapter, and SCSI peripherals are ready to use, and you do not need to run the SCSISelect utility or change any switch settings.
9
Configuring the Host Adapter
Your AVA-2825 host adapter includes the SCSISelect configuration utility. SCSISelect lets you change host adapter settings such as parity checking and host adapter SCSI ID without opening your PC or changing host adapter switches.
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To run SCSISelect, press Ctrl-A when you boot your
PC and the SCSISelect message appears.
Use the arrow (
↑↓
) and Enter keys to make selections. Press Esc at any time to return to the previous menu. Press F6 to restore the original default settings.
To abandon changes made in the Configure/View
Host Adapter Settings menu, press Esc and select No when asked if you want to save the changes.
Configure/View Host Adapter Settings
The SCSISelect Configuration screen displays these options: Host Adapter Interrupt (IRQ) Channel, Host
Adapter SCSI ID, SCSI Parity Checking, and Host
Adapter SCSI Termination. Highlight an option and press Enter to see a list of possible values.
Select SCSI Device Configuration to view a menu of the following options: Enable Sync Negotiation,
Enable FAST SCSI, and Enable Disconnection. These settings apply to all devices on the SCSI bus. You must disable an option if one or more SCSI devices do not support it.
Select Advanced Configuration Options to view a menu of the following options: System Boot (Int 19h)
Controlled by Host Adapter BIOS, Extended BIOS
Translation for DOS Drives > 1 GByte, and BIOS
Support for Floptical Drives. Do not change these options unless absolutely necessary.
SCSI Disk Utilities
When you select SCSI Disk Utilities from the Main
Menu, a list of installed SCSI devices appears. When you select a device, the Utilities menu appears. Format Disk runs the Adaptec SCSI low-level format utility. Verify Disk Media scans the selected disk drive (or other disk device) for defects.
10
I/O Operating Environment Software
You can connect up to two hard disk drives to the
AVA-2825 without additional software. You need additional software, such as Adaptec’s EZ-SCSI
™
Lite, if you want to do the following:
■
Connect more than two hard disk drives
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Remove and insert magneto-optical and other kinds of removable media while your PC is running
Connect devices other than disk drives, such as
SCSI tape drives, CD-ROM drives, and scanners.
11
Troubleshooting Checklist
Check the following items first if you have a problem during installation:
■
Are all SCSI peripheral devices powered?
■
■
■
Are all SCSI bus cables and power cables properly connected?
Does each SCSI device have a unique SCSI ID?
Are all devices on the SCSI bus terminated properly?
PC Will Not Boot from a SCSI Disk Drive
If your PC has both SCSI and IDE disk drives, the
IDE disk drive is always the boot device. If the PC has only SCSI disk drives, check the following:
1 Make sure your PC's CMOS
setup
is set to No
Drives Installed , which is required for SCSI host adapters.
2 Make sure the SCSI ID of the boot hard disk is 0 and the boot partition is active. (The SCSI ID is usually set with jumpers or switches on the drive.)
3 If this does not solve the problem, back up all data on the SCSI hard disk and perform a low-level format with the SCSISelect Format Disk option.
4 Partition the disk. See the MS-DOS User’s Guide for instructions.
12
Adaptec Customer Support
■
■
For information on software upgrades, new releases, technical advice, and other topics, call Adaptec’s Electronic Bulletin
Board Service (BBS) 24 hours a day at 408-945-7727;
1200/2400/9600/14400 baud, 8 data bits, 1 stop bit, no parity.
For the latest online information about Adaptec products and services, call the Interactive Fax Service 23 hours a day, 7 days a week, at 408-957-7150.
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For technical assistance, call Adaptec’s Technical Support Hot
Line at 800-959-SCSI (7274), or 408-945-2550. M–Th: 6:00 a.m.–
5:00 p.m., F: 6:00 a.m.–3:00 p.m., Pacific Time.
To order Adaptec software and SCSI cables, call 800-442-SCSI
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