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Date:      Wed, 22 Jul 1998 16:47:29 -0600 (MDT)
From:      "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
To:        Erik Bakke <erikhb@bgnett.no>
Cc:        scsi@FreeBSD.ORG
Subject:   Re: AHC SCSI errors
Message-ID:  <199807222247.QAA02846@narnia.plutotech.com>
In-Reply-To: <901099770.0027031.0@office.demon.net> <35B646BA.655E2B19@bgnett.no>

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>> Seen over various drives and over both controllers when the drives were
>> split between them; option SCB_PAGING is not enabled;
>> 
> 
> This also shows up on my computer, running 3.0-CURRENT cvsup as of 18.
> jul. 98 and CAM.
> Equipment in use:
> 
> Adaptec 2940U2W and 1 Seagate Cheetah 34502LW U2W drive.

Another possibility that Matthew Jacob brought up is that the drives
may be performing thermal recal.  The Seageate rep once told us that
their newer drives perform recalibration on a per-track basis which
only blocks for ~250ms.  Perhaps he lied.  You can certainly try
bumping up the timeout values in the scsi_da driver (try 1 minute) and
see if this addresses your problem.

--
Justin

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