Date: Thu, 24 Apr 1997 16:42:39 +0100 From: Alan Judge <Alan.Judge@indigo.ie> To: freebsd-scsi@freebsd.org Subject: Target busy and other errors Message-ID: <199704241542.QAA11526@indigo.ie>
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[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 <Adaptec aic7880 Ultra SCSI host adapter> 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
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