From owner-freebsd-scsi Tue Feb 29 22:40:47 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from mass.cdrom.com (mass.cdrom.com [204.216.28.184]) by hub.freebsd.org (Postfix) with ESMTP id 024FD37BE78; Tue, 29 Feb 2000 22:40:45 -0800 (PST) (envelope-from msmith@mass.cdrom.com) Received: from mass.cdrom.com (localhost [127.0.0.1]) by mass.cdrom.com (8.9.3/8.9.3) with ESMTP id WAA03924; Tue, 29 Feb 2000 22:40:39 -0800 (PST) (envelope-from msmith@mass.cdrom.com) Message-Id: <200003010640.WAA03924@mass.cdrom.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: "Kenneth D. Merry" Cc: Mike Smith , scsi@FreeBSD.ORG Subject: Re: chio trap with not-ready changer In-reply-to: Your message of "Tue, 29 Feb 2000 23:36:15 MST." <20000229233615.A28297@panzer.kdm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 29 Feb 2000 22:40:39 -0800 From: Mike Smith Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > On Tue, Feb 29, 2000 at 22:21:39 -0800, Mike Smith wrote: > > > Okay, I think I know why the panic is happening at least. I don't > > > understand why you're getting the unit attention error, though, since we > > > generally retry unit attention errors unconditionally. > > > > > > Try the attached patch and see if it fixes things up. Once you've got the > > > panic fixed, we can attempt to solve the unit attention problem. > > > > Ok, it's not panicking anymore: > > > > pass0 at ahc0 bus 0 target 4 lun 0 > > pass0: Removable Changer SCSI-2 device > > pass0: Serial Number 3 > > pass0: 3.300MB/s transfers > > ... > > (ch0:ahc0:0:4:0): MODE SENSE(06). CDB: 1a 0 1d 0 20 0 > > (ch0:ahc0:0:4:0): UNIT ATTENTION asc:29,0 > > (ch0:ahc0:0:4:0): Power on, reset, or bus device reset occurred > > (ch0:ahc0:0:4:0): fatal error, failed to attach to device > > (ch0:ahc0:0:4:0): lost device > > (ch0:ahc0:0:4:0): removing device entry > > > > Now what? 8) > > Well, I still can't figure out how you're getting a failure from a unit > attention error. I suppose the next thing to try is to bump the retry > count. The attached patch is the same as before, but with the retry count > set to 3 instead of 1. Ah. I think I understand this. How long is the delay between retries? Is there anyway to get a "device becoming ready" status? I'd hazard a guess that you're going to get the above error repeated until the changer has finished resetting (may be several minutes). -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message