Date: Thu, 18 Mar 1999 19:52:09 -0500 From: "Chuck O'Donnell" <cao@bus.net> To: "Justin T. Gibbs" <gibbs@plutotech.com> Cc: "Chuck O'Donnell" <cao@bus.net>, scsi@FreeBSD.ORG Subject: Re: error messages from bt driver Message-ID: <19990318195209.A27547@milf18.bus.net> In-Reply-To: <199903140053.RAA13024@pluto.plutotech.com>; from Justin T. Gibbs on Sat, Mar 13, 1999 at 05:44:29PM -0700 References: <19990313183436.B11051@milf18.bus.net> <199903140053.RAA13024@pluto.plutotech.com>
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On Sat, Mar 13, 1999 at 05:44:29PM -0700, Justin T. Gibbs wrote: > >Thanks for the reply Justin. > > > >I tried 5.06I from the Mylex site, but no improvement. Same error > >messages show up. Any thoughts on other things I can check? > > > >Thanks. > > > >Chuck > > One thing I don't know about on the MultiMasters is how they deal > with a disk returning queue full status. Your Seagate will only > handle 64 commands at a time, but we've queued up 191 to the > Buslogic. Perhaps it will not release the mailbox for a transaction > that is in the queue full state? This would cause the first error > message to occur. My guess is that a quirk entry in sys/cam/cam_xpt.c > limiting the number of tags for your drive to 64 will prevent the > problem from happening. > I've had no disk errors since we made the quirk entries. If my understanding is correct, the quirk entries were made because the controller didn't handle SCSI_STATUS_QUEUE_FULL correctly (in cam_periph.c)? But now I see the following, which I understand to be only informational messages, but still curious as to the source: Mar 16 11:20:17 fern /kernel: (pass0:bt0:0:0:0): tagged openings now 32 Mar 16 11:20:23 fern /kernel: (pass0:bt0:0:0:0): tagged openings now 2 I would have thought that if the controller wasn't passing along the queue full message, then this code would never be triggered. Does the `pass' driver do something different that the `da' driver does not? Thanks. Chuck To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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