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Date:      Wed, 18 Aug 1999 14:28:51 -0600 (MDT)
From:      "Kenneth D. Merry" <ken@kdm.org>
To:        sthaug@nethelp.no
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: camcontrol reset 0:3:0 hangs systems
Message-ID:  <199908182028.OAA22119@panzer.kdm.org>
In-Reply-To: <3369.934997816@verdi.nethelp.no> from "sthaug@nethelp.no" at "Aug 18, 1999 07:36:56 pm"

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sthaug@nethelp.no wrote...
> System: FreeBSD 3.2-STABLE as of 17. august, 2xPII-450, Adaptec SCSI
> controller:
> 
> ahc0: <Adaptec 2940 Ultra2 SCSI adapter> rev 0x00 int a irq 11 on pci0.12.0
> ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs
> 
> and 4 IBM disks:
> 

[ ... ]

> A "camcontrol reset 0" works fine, "Reset of bus 0 was successful".
> 
> A "camcontrol reset 0:3:0" (trying to reset da2) reliably hangs the
> system (no response from the command, everything hangs). Error messages
> on console:
> 
> (xpt0:ahc0:0:3:0): Bus Device Reset Message Sent
> ahc0: Bus Device Reset on A:3. 1 SCBs aborted.
> 
> The hang occurs whether the system runs a uniprocessor or an SMP kernel,
> and it doesn't matter which disk is attempted reset either.

[ ... ]

That's a known problem.  I think I know how to fix it, but I haven't had a
chance to do so yet.  Hopefully I'll get to it before the end of the month.

Ken
-- 
Kenneth Merry
ken@kdm.org


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