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From: Ian Pallfreeman <ip@tharg.eu.org>
Message-Id: <199711131954.TAA03123@tharg.eu.org>
Subject: Re: AHC / SCSI Problem?
In-Reply-To: <199711131520.KAA09225@ussenterprise.ufp.org> from Leo Bicknell at "Nov 13, 97 10:20:08 am"
To: bicknell@ufp.org
Date: Thu, 13 Nov 1997 19:54:28 +0000 (GMT)
Cc: scsi@freebsd.org
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On freebsd-hackers, Leo Bicknell wrote:

> 	We've been having some problems here with FreeBSD,
> Adaptec 2940's, and various disk drives.
> [...]
> ahc0 <Adaptec 2940A Ultra SCSI host adapter> rev 1 int a irq 9 on pci0:18
> ahc0: aic7860 Single Channel, SCSI Id=7, 3 SCBs
> ahc0 waiting for scsi devices to settle
> (ahc0:0:0): "MICROP 4221-09 1128RQAV RQAV" type 0 fixed SCSI 2
> sd0(ahc0:0:0): Direct-Access 1955MB (4004219 512 byte sectors)
> sd1(ahc0:1:0): SCB 0x2 - timed out while idle, LASTPHASE == 0x1, SCSISIGI == 0x0
> SEQADDR = 0x5 SCSISEQ = 0x12 SSTAT0 = 0x5 SSTAT1 = 0xa
> sd1(ahc0:1:0): Queueing an Abort SCB
> sd1(ahc0:1:0): Abort Message Sent
> sd1(ahc0:1:0): SCB 2 - Abort Completed.
> sd1(ahc0:1:0): no longer in timeout

FWIW, I'm also having incredible problems with a similar setup. The Micropolis
disks seem fine with an NCR controller, and the Adaptecs are OK with a pile of
old Sun disks. Symptoms include those you describe, and worse: fsck bombs with
an intermittent SIGFPE, a ``make world'' scribbles bits of garbage into the
binary of ``make'' (the first thing it builds). Frankly, it's driving me nuts.

I would expect that if there were gotchas with Micropolis disks and Adaptec
controllers, the folks on freebsd-scsi would know. I'm CC'ing a copy of this
there (not to -hackers) in the hope of reassurance or mocking laughter, either
of which might provide some guidance. :-)

Ian.