SCSI device polling problem

L

Lil' Dave

Adaptec 2930CU adapter (bios enabled) with Seagate 4.3, IBM 9.1, Ultraplex
CDrom, and Seagate Travan 8 NS tape drive.

Cold boot, almost every cold boot, either no device found (froze at scsi
bios routine), or the IBM 9.1 was not found and scsi bios routine stops
there. Several warm boots and perhaps a cold boot or two, would clear up
and system would boot normally. Found the IBM 9.1 drive's SCSI cable
connection not fully seated. This seems to cleared up the majority of the
problem.

Now, the problem is during windows boot. Sometimes, before the windows
desktop shows, the SCSI bus is polled and the IBM 9.1 has already previously
spun up during power up (obvious due to its noisy nature during spinup).
Normally the IBM 9.1 is already spunup and all is well. If it spins up
again during windows boot, usually, windows fails to load no matter how long
I wait.

I have an LED indicator panel connected to the Adaptec 2930CU adapter to let
me know when the SCSI bus is actively polled; along with the LEDs on the
Ultraplex and Travan tape drive. There is another LED on same panel
connected to a Promise Ultra100 adapter for the same reason on pseudo IDE.

Motherboard is an AOpen AX4GE-N. I cannot find any facility NOT to use PNP
in the bios. Therefore, I cannot exclusively delegate an irq to any device
in the bios setup, there is no facility for setting an irq to a specific PCI
slot. The SCSI card is sharing irq 11 with the USB enhanced (2.0)
controller. The Promise card is sharing irq 10 with the onboard video, and
2 standard USB controllers. But, this doesn't seem to affect anything
regarding the Promise card or its two attached hard drives, video or USB.
USB devices are optical mouse, HP 770 printer, and Ambient Tech modem.

Onboard IDE devices are boot drive (WD 80 JB) as primary/master, Plexwriter
12/10/32A as secondary slave, and LS-120 as secondary/master. No standard
floppy drive, floppy controller is disabled, and irq 6 is free/not used.
Normally, I can delegate irq 6 to a PCI slot; but not on this motherboard.

My questions: Is the problem noted regarding the IBM 9.1 spinning up again
during windows boot a drive problem, SCSI bus problem, SCSI cable problem,
or SCSI adapter problem, or what? How do I fix it?

Last night, I heard the IBM 9.1 spin up of its own accord a couple of times
during a windows session. Was not accessing this drive. Did not seem to
affect windows operation.

If you need more info, just ask. Post here. No email please.

Dave
 
M

Mike Tomlinson

Lil' Dave said:
My questions: Is the problem noted regarding the IBM 9.1 spinning up again
during windows boot a drive problem, SCSI bus problem, SCSI cable problem,
or SCSI adapter problem, or what? How do I fix it?

Jumper the IBM drive so it always spins up when power is applied.
 

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