Date: Thu, 05 May 2011 11:56:09 -0400 From: Mike Neimoyer <mike@summersault.com> To: freebsd-scsi@freebsd.org Subject: Making sense of error codes Message-ID: <4DC2C899.8070502@summersault.com>
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Good morning, all. First post to the group, and I'm a bit of a newbie in general, so please be gentle. :) I'll provide as much information as I know how to, and if there's more you need, please let me know and I'll do my best! Thanks. Recently, I've had a tape library's autoloader stop being recognized. It was working just fine, and then the backup software (amanda) began reporting errors that it couldn't communicate. No changes were made to the system and it had run a backup earlier that morning successfully. Multiple attempts to re-establish communications failed, checked all cables, verified that the system saw the device by "camcontrol devlist" (it did, but the unit was listed simply as "pass3" instead of the usual "ch0,pass3"). Was eventually told to shutdown and powercycle both units, but without success. Basics: FreeBSD 6.1-RELEASE Dell Powervault 124t via SCSI Checking the /var/log/messages file, after the I see: May 2 16:44:24 jazz kernel: sa0 at ahc1 bus 0 target 12 lun 0 May 2 16:44:24 jazz kernel: sa0: <CERTANCE ULTRIUM 2 1914> Removable Sequential Access SCSI-3 device May 2 16:44:24 jazz kernel: sa0: 160.000MB/s transfers (80.000MHz, offset 127, 16bit) May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): MODE SENSE(06). CDB: 1a 20 1d 0 20 0 May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): HARDWARE FAILURE asc:40,84 May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): (null) May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): fatal error, failed to attach to device May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): lost device May 2 16:44:24 jazz kernel: (ch0:ahc1:0:12:1): removing device entry So, there is a hardware failure somewhere, but I am not sure how to determine if it's the internal card or the external tape library unit itself (in a perfect world, I'd have another tape library unit I could just swap out, but alas.... :) ). I've tried looking up the ASC (40, 84), but can't seem to find a agreed-upon meaning for them. I could, quite probably in fact, simply not be looking in the right place. Can any kind soul point me in the right direction for figuring this issue out? Thanks! Best, ~~Mike
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