Date: Thu, 12 Nov 1998 15:22:56 +0000 (GMT) From: Mark Powell <M.S.Powell@ais.salford.ac.uk> To: "Kenneth D. Merry" <ken@plutotech.com> Cc: Mark Powell <M.S.Powell@ais.salford.ac.uk>, freebsd-scsi@FreeBSD.ORG Subject: Re: 3.0 scsi parity and tagged openings problems Message-ID: <Pine.BSF.3.96.981112152239.13696A-100000@plato.salford.ac.uk> In-Reply-To: <199811110423.VAA14192@panzer.plutotech.com>
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In article <72bbsi$p22$1@ananke.salford.ac.uk>, Kenneth D. Merry <ken@plutotech.com> wrote: >Mark Powell wrote... >> Nov 10 15:48:55 titan /kernel: (da3:ahc1:0:4:0): tagged openings now 64 >> Nov 10 15:48:55 titan /kernel: (da3:ahc1:0:4:0): tagged openings now 63 >> Nov 10 15:48:58 titan /kernel: (da2:ahc0:0:1:0): tagged openings now 2 >> Nov 10 15:48:58 titan /kernel: (da2:ahc0:0:1:0): tagged openings now 2 > >It looks like one of your disks at least doesn't like tagged queueing. The >interesting thing is that it's one of the drives that is *not* in your CCD >array. (you said that only da1 and da3 are in the array) Were you doing >I/O to da2 at the time? What's on that disk? I would suggest that you: OOps, that was me recreating the output that had scrolled off the screen. Sorry :) That last drive should have been da1, of course. >The reason you probably didn't see this on 2.2.7-stable is because the old >SCSI layer only allowed 4 tags at a time to go to a drive. It may be that >your drive has trouble whenever its transaction queue gets full and it has >to return queue full status. The old SCSI code probably wouldn't have >filled the transaction queue, but CAM will send as many transactions as it >can to the disk. Okay, Kenneth, looks like I need Seagate or IBM drives in future. Many thanks for your advice. >Kenneth Merry >ken@plutotech.com Mark Powell - System Administrator (UNIX) - Clifford Whitworth Building A.I.S., University of Salford, Salford, Manchester, UK. Tel: +44 161 295 5936 Fax: +44 161 295 5888 Email: M.S.Powell@ais.salfrd.ac.uk www.pgp.com (for PGP key) NO SPAM please: Spell salford correctly to reply to me. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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