Date: Thu, 05 May 2011 23:22:33 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Mike Neimoyer <mike@summersault.com> Cc: freebsd-scsi@freebsd.org Subject: Re: Making sense of error codes Message-ID: <4DC30709.9050608@FreeBSD.org> In-Reply-To: <mailpost.1304612622.2110249.75862.mailing.freebsd.scsi@FreeBSD.cs.nctu.edu.tw> References: <mailpost.1304612622.2110249.75862.mailing.freebsd.scsi@FreeBSD.cs.nctu.edu.tw>
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Mike Neimoyer wrote: > 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! According to SPC-3 specification "asc:40,84" means: "DIAGNOSTIC FAILURE ON COMPONENT NN (80H-FFH)", where NN is 84H. -- Alexander Motin
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