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SCSI Bus Termination–allows you to enable or
disable SCSI termination on the host adapter.
BIOS and SCSI Device Configuration–sets
BIOS and SCSI device options. Refer to the
following section for information on these options.
BIOS and SCSI Device Configuration
BIOS Configuration
This option allows you to configure the host
adapter BIOS.
Greater Than 1 GByte Drive Support–provides
a mechanism for using a hard disk with a capacity
greater than 1 GByte. If this option is enabled, the
following translation schemes are used:
Hard disks
1 GByte use a translation scheme
of 64 heads, 32 sectors per track
Hard disks
1 GByte use a translation scheme
of 255 heads, 63 sectors per track
More Than Two Drives Support–allows BIOS
to support more than two SCSI hard disks (sup-
ported by DOS 5.0 and above). If this option is
enabled, up to eight hard disks can be attached to
INT 13h.
Removable Drive Support–allows you to select
one of the following options for configuring
removable drive support:
Disable removable drive support
Support removable drive as boot device only
Support all removable drives
Note
Support for removable drives means only that the BIOS
allows for use of a removable drive as if it were a fixed
disk drive; it does not mean that the disk media can be
removed during operation.
SCSI Device Configuration
This option allows you to customize the configura-
tion of the SCSI devices connected on the SCSI bus.
Select values for each setting as instructed on the
screen's menu.
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Error if Device Not Found–selects whether the
operator will be notified if the BIOS is unable to
find the device during the boot procedure.
BIOS Support Option–allows devices attached to
the SCSI bus to be recognized by the host adapter
BIOS and installed as devices on the system
without the need for device driver software.
Send Start Command–is used for devices that
require a command to start up after power-on.
Most devices do not require this.
Initiate Synch Negotiation–allows the host
adapter to attempt to use the faster synchronous
protocol for data transfers on the SCSI bus. If de-
selected, the transfer will be done asynchronously,
unless a SCSI device itself requests synchronous
negotiation.
Enable Disconnection–allows the device to go
off-line while performing an operation. This allows
the host adapter to perform other operations on the
SCSI bus while the SCSI device is temporarily
disconnected.
Maximum Synch Transfer Rate–allows selec-
tion of the highest data transfer speed that the
host adapter will attempt with that peripheral. The
host adapter supports rates up to the Fast SCSI
maximum of 10 MBytes/second.
When configuration of the SCSI devices is com-
plete, save the configuration and exit the EISA
Configuration utility.
Utilities
Two SCSI utilities are available with your host
adapter:
Format Disk–accesses the Adaptec SCSI Low-
Level Format utility. Most SCSI disk drives are
pre-formatted, and do not need re-formatting.
Host Adapter Diagnostics–runs a diagnostic on
your host adapter by doing DMA transfers between
the SCSI host adapter and system memory. You
should run this utility without any device drivers
or TSRs loaded. This test will run indefinitely until
Esc is pressed.
8
7
Operating Environment Software
DOS/Windows
®
Under MS-DOS
5.0 or higher, up to eight SCSI
hard disk drives can be connected to the host
adapter without additional software. (Older
versions of DOS support up to two hard disk
drives.) Additional software is required if you
desire to do the following:
Support more than two hard disk drives under
versions of DOS prior to MS-DOS 5.0
Use devices other than hard disk drives such as
SCSI tape, CD-ROM, scanners, etc.
Treat removable media devices as removable
while your computer is running
Refer to the documentation received with your I/O
environment software package for instructions on
loading your SCSI I/O operating environment for
versions of DOS prior to MS-DOS 5.0.
®
®
Novell NetWare
, OS/2
, and UNIX
Adaptec is working with major operating system
suppliers to provide embedded support in their
operating systems. Please contact Adaptec or your
operating system vendor for information on the
current schedule for I/O operating environment
software support.
8
Troubleshooting
System Will Not Boot From a SCSI Disk Drive
If both SCSI and non-SCSI disk drives are
installed, then the non-SCSI disk drive is always
the boot device. If there is no non-SCSI disk drive:
1. Make sure your computer system's CMOS Setup
is set to No Drives Installed, as is required for
SCSI host adapters.
2. Try enabling the BIOS Support Option in the
BIOS and SCSI Device Configuration
option. See Section
, Configuring the Host
6
Adapter.
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®
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