From owner-freebsd-scsi Thu Apr 24 08:42:47 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id IAA12347 for freebsd-scsi-outgoing; Thu, 24 Apr 1997 08:42:47 -0700 (PDT) Received: from indigo.ie (aoife.indigo.ie [194.125.133.9]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id IAA12342 for ; Thu, 24 Apr 1997 08:42:44 -0700 (PDT) Received: from indigo.ie (localhost [127.0.0.1]) by indigo.ie (8.8.5/8.8.5/INDIGO-HUB) with ESMTP id QAA11526 for ; Thu, 24 Apr 1997 16:42:39 +0100 (BST) Message-Id: <199704241542.QAA11526@indigo.ie> To: freebsd-scsi@freebsd.org Subject: Target busy and other errors From: Alan Judge Date: Thu, 24 Apr 1997 16:42:39 +0100 Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk [Fun day. This is a different machine.] I upgraded another machine here to 2.2-STABLE this morning. It was running 2.2-GAMMA and was giving the odd SCSI error. The machine only stayed up a few hours before hanging completely. Symptoms were a burst of "sd0(ahc0:0:0): Target Busy" errors then a burst of other stuff about SCBs and so on, before a panic on freeing a free inode and a hang (with more SCB stuff) after the syncing disk message. (Sorry I don't have more info, but the machine was important and was rebooted before I got a chance to write things down.) In the past under 2.2-GAMMA, I've seen other errors, like overlapped command errors (but usually after a target busy), and timeouts of the sort that 2.2-STABLE is supposed to fix. The errors are always on sd0, so I'm wondering if it's specific to the disk or controller. sd0 is an internal narrow Barracuda on its own on a motherboard controller in a HP Vectra XU. External terminator. FreeBSD identifies: ahc0 rev 0 int a irq 9 on pci0:2 ahc0: Using left over BIOS settings aic7880 Single Channel, SCSI Id=7, 16/255 SCBs There are also two 2940UWs and a bunch of external Atlas II-UWs that give no problems that I've seen. But sd0 probably bursts busier. Backups appear to be particular causes of lockups. I've moved back to 2.2-GAMMA for the moment, as it's never locked up in the same way, though the errors sometimes cause paging errors and process crashes. -- Alan Judge Phone: +353-1-6046901 Indigo Internet Services Fax: +353-1-6046948