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Chapter 4 - SCSI Installation (XVME-956/412)
4.2.3.1 A F D I S K Operation
Locate the diskette shipped with the module and copy the five files in the AFDISK subdirectory into a
working subdirectory.
To run AFDISK, simply type AFDISK at the DOS prompt. Follow the directions on the screen to
partition and format the selected SCSI devices. B y pressing the Fl key, the AFDISK utility also
provides on-line help.
By pressing the ESC key, the AFDISK utility may be exited at any time without executing any changes.
Reboot the system once the SCSI device(s) are partitioned and formatted. This step saves any changes
made and allows use of the newly installed disk(s) or partition(s) by the aspidisk.sys utility.
4.3 B I O S OPERATION
This section describes operation with the module's BIOS, and also discusses module configuration,
partitioning, and formatting.
Module Switch Configuration
There are two switch banks on the module which the BIOS reads to configure the SCSI interface, (refer
to Tables 4-1, and 4-2). T h e user will set these switches to affect SCSI options. Each switch bank has
eight individual switches which can be opened or closed. Configure these switches as described in the
paragraphs that follow.
SCSI Options
All SCSI options must be determined. These options are the following:
•
M o d u l e Target Number
- This is a number from 0 to 7 inclusive. This number must be
unique and is typically defined as 7 for the module (host).
•
P a r i t y
- Parity disabled will not check parity on the SCSI bus. Parity enabled will allow the
module to check parity on the SCSI bus. This option is typically enabled.
•
Synchronous Negotiation
- When this option is enabled, the module will initiate synchronous
negotiations with targets on the SCSI bus. When this option is disabled, the module will not
initiate synchronous negotiations, but will respond to negotiations from other targets. T h i s
option is disabled for older SCSI targets which do not understand synchronous negotiation
protocol. This option is typically enabled.
4-8
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