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Date:      Tue, 13 Apr 1999 22:02:35 -0500
From:      "Jason" <jes@hal-pc.org>
To:        <freebsd-scsi@freebsd.org>
Cc:        <jes@hal-pc.org>
Subject:   Tagged queueing problem with Seagate drive
Message-ID:  <023801be8623$40608fc0$0500a8c0@local.nullifier.dyn.ml.org>

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This is a Seagate ST410080N that basically reports itself as a SX410080N and
thus the ST410080* quirk entry doesn't catch it.

It typically needs a hard reset after locking up after reducing tags 1-3
from 64. The drive is alone on the SCSI bus and properly terminated. I
currently don't have any error messages from when the drive locks up, though
the typical sense code is 0x151.

relevant dmesg bits:
.
.
.
ahc0: <Adaptec aic7880 Ultra SCSI adapter> rev 0x00 int a irq 11 on
pci0.18.0
ahc0: aic7880 Single Channel A, SCSI Id=7, 16/255 SCBs
.
.
.
da0: <SEAGATE SX410800N 7116> Fixed Direct Access SCSI-2 device
da0: 10.000MB/s transfers (10.000MHz, offset 15)
da0: 8347MB (17096357 512 byte sectors: 64H 32S/T 8347C)
.
.
.

I've put a quick quirk entry for this drive with tags reduced to 32, and so
far, haven't had any problems, though I haven't tried any other settings to
test performance.

- Jason





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