C-12
AlphaServer 8200/8400 Operations Manual
Table C-3 Host Adapter Parameters
Parameter
Default
Description
Reason to Change
FIFO
Threshold
2 (KFTIA)
3 (KZPBA)
Sets the FIFO threshold
point at which burst
transfers are requested
on the ISP1020/1040
adapter.
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performance. ¹
Host Adapter
Enable
1
Determines whether the
BIOS recognizes the
ISP1020/1040 host
adapter.
Disable the host adapter
without physically
removing it from the
system.
Initiator SCSI
ID
7
Sets the SCSI ID for the
ISP1020/1040.
If a SCSI bus has
multiple SCSI adapters.
Bus Reset
Delay
1
Sets the delay (after
resetting the SCSI bus)
before the firmware
initiates any SCSI
activity.
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performance. ¹
Retry Count
0
Determines the number
of times the firmware
attempts to retry a
selection timeout or a
busy status.
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performance. ¹
Retry Delay
1
Sets the time (in 100
microsecond increments)
that the firmware waits
before reattempting an
operation.
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performance. ¹
Asynchronous
Data Setup
Time
9
Sets the number of clock
periods the
ISP1020/1040 host
adapter card waits after
driving the SCSI data
signals before asserting a
SCSI bus acknowledge
signal.
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performance. ¹