SUMMARY probe-scsi-all hang up the system

Ying He (yhe@shadow.sph.jhu.edu)
Fri, 20 Jun 1997 13:25:09 -0400

Just a couple of hours I recieved a lot of replies, thanks for
following peoples and some coming...

idt@inetinc.com Ian

ejo@astro.phys.cmu.edu

joem@joem.polaris1.com
mgil@reach.com Manuel
mroo@asml.com Mark de Roo
scott@msi-uk.com Scott

foster@bial1.ucsd.edu Dave

Solution:
setenv auto-boot? = false
reset-all (hit stop-A right away)
probe-scsi
setenv auto-boot? = true
reset-all

I am attaching the -email from Mark de Roo, I have not try it.

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> Collection: Internal SRDBs
> Document: 13189
>
>
> SRDB ID: 13189
> STATUS: Issued
>
> SYNOPSIS: Probe-scsi hangs on Ultras
>
> DETAIL DESCRIPTION:
>> Probe-scsi hangs on ultras if you do a probe-scsi
> after a halt or stop-A.
>
> SOLUTION SUMMARY:
>
> If you look at OBP command reference manual, the probe-scsi
> done any other way produces unpredictable results,
> that is, OBP will not know the state of system when it was halted.
>
> OBP cannot control what state the system ends
> up in when it is halted; therefore, it doesn't know what part needs to be
> re-initialized back to a known state. The part(s) that needs to be
> re-initialized might depend on the drive, or when the Stop-A was done, or the > version of the booter, or the OS that was running, etc.
>
> So the correct way of doing a probe-scsi is:
>
> Stop-A to get to ok prompt
> ok setenv auto-boot? false
> ok reset-all
> ok probe-scsi \ check your output
> ok setenv auto-boot? true \ reset auto-boot? and boot
> ok reset-all

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Thanks a again.

Ying
.