Re: [Veritas-bu] Linux Media Server Tape Drive Issues


On Wed, 30 May 2007, Brooks, Jason wrote:

> Yesterday, we had a major power outage and some servers went down
> ungracefully, namely our Linux Media Server.  When power was restored, the
> Windows Master and Linux Media server came up fine.  My Windows box saw the
> two drives for it, the Linux box only saw one of three.  The tape drives are
> zoned as follows:
>
> Switch1---------------Drive3---------LinuxMediaServer
> Switch2---------------Drive1---------LinuxMedia
>     |                     |---------WindowsMaster
>     |----------------Drive2---------LinuxMedia
>                                |---------WindowsMaster
>
> It was drives 1 and 2 that were gone.  However, Windows sees them fine.
> Checked fiber cabling on the Linux box.  Fine.  Checked and actually
> reconfigured it's zone on the switch.  Looked in dmesg logs.  There, I find
> that there are suddenly scsi reservation conflicts.  Log snippet:
>
> st: Version 20040102, bufsize 32768, max init. bufs 4, s/g segs 16
> Attached scsi tape st0 at scsi1, channel 0, id 0, lun 0
> Attached scsi tape st1 at scsi1, channel 0, id 1, lun 0
> Attached scsi tape st2 at scsi2, channel 0, id 0, lun 0
> usb.c: registered new driver serial
> usbserial.c: USB Serial support registered for Generic
> st0: Error 18 (sugg. bt 0x0, driver bt 0x0, host bt 0x0).
> st1: Mode 0 options: buffer writes: 0, async writes: 0, read ahead: 0
> st1:    can bsr: 0, two FMs: 0, fast mteom: 0, auto lock: 0,
> st1:    defs for wr: 1, no block limits: 0, partitions: 0, s2 log: 0
> st1:    sysv: 0 nowait: 0
> st1: Default block size set to 0 bytes.
> st1: Density default set to 0
> st2: Error 18 (sugg. bt 0x0, driver bt 0x0, host bt 0x0).
> st0: Error 18 (sugg. bt 0x0, driver bt 0x0, host bt 0x0).
> st2: Error 18 (sugg. bt 0x0, driver bt 0x0, host bt 0x0).
>
> As you can see, st1 is functional.  The other two fail to present to the
> server.  So far, we've not found a solution, and I'm not sure that either
> software or the tape library vendor would help.
>
> Suggestions?
>
> Thanks,
> Jason
>
> ------------
> Jason Brooks
> Computer Systems Engineer
> IITS - Longwood University
> voice - (434) 395-2034
> fax - (434) 395-2035
> mailto:<brooksje AT longwood DOT edu>
>

Do the drives have tapes stuck in them?
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