Date: Mon, 6 Jan 2014 22:01:25 +0000 From: Ben Laurie <ben@links.org> To: freebsd-scsi@freebsd.org Subject: Dropped interrupts Message-ID: <CAG5KPzxUAnORPSyJDrSdBBNE7MBi-dD=M6=E1rMG%2Bc8rn4deUQ@mail.gmail.com>
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Not subscribed to the list, so please cc on replies. I'm using Bacula with an LTO-2 SCSI drive. With increasing frequency lately, I've been getting errors like this from bacula: backup-sd JobId 13092: Error: block.c:608 Write error at 23:6772 on device "Ultrium" (/dev/nsa0). ERR=Operation not permitted. Associated with this, I see in dmesg: ahc0: Recovery Initiated [a lot of dump info, including...] ahc0: Timedout SCBs already complete. Interrupts may not be functioning. Interrupts must be kinda functioning, because it can go for weeks at a time without problems. I've looked into it a bit, and the SCSI board is sharing an interrupt with one of the USB hubs. My first thought was to configure it to not use a shared interrupt, but this turns out to be impossible. Could that be the cause? Any suggestions on how to fix this? I believe backups are not actually compromised, but tapes are not filled, which causes some pretty serious problems. Obviously happy to provide any more info that would be helpful.
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