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Re: [Bacula-users] scsi help
2009-01-09 01:54:31
Michael Galloway <mgx AT ornl DOT gov> wrote on 09/01/2009
09:56:08 AM:
> Michael Galloway
>
> to: bacula
>
> 09/01/09 09:58 AM
>
> could i get a sanity check please? i've replaced my spectralogic T50
> (had some hardware issues) and i'm
> rebuilding backup server. i'm working through the basic tape and
> changer tests. scsi looks like this:
>
> [root@molbio bin]# lsscsi
> [0:0:0:0] disk ATA TOSHIBA
MK2035GS DK02 /dev/sda
> [1:0:0:0] disk ATA TOSHIBA
MK2035GS DK02 /dev/sdb
> [4:0:0:0] disk AMCC 9650SE-16M
DISK 3.08 /dev/sdc
> [5:0:14:0] tape IBM ULTRIUM-TD4
89B8 /dev/st0
> [5:0:15:0] tape IBM ULTRIUM-TD4
89B8 /dev/st1
> [5:0:15:1] mediumx SPECTRA PYTHON
2000 -
>
> mtx status looks as i would expect:
>
> [root@molbio bin]# mtx -f /dev/sg5 status
> Storage Changer /dev/sg5:2 Drives, 30 Slots ( 0 Import/Export )
> Data Transfer Element 0:Empty
> Data Transfer Element 1:Empty
> Storage Element 1:Full :VolumeTag=000290L4
> Storage Element 2:Full :VolumeTag=012477L4
> etc ....
>
> however, when i use mtx to load a tape i get somewhat unexpected results:
>
> [root@molbio bin]# mtx -f /dev/sg5 load 1 0
>
> should load slot 1 into /dev/st0, i think, what i get is this:
>
> [root@molbio bin]# mt -f /dev/nst0 status
> SCSI 2 tape drive:
> File number=-1, block number=-1, partition=0.
> Tape block size 0 bytes. Density code 0x0 (default).
> Soft error count since last status=0
> General status bits on (50000):
> DR_OPEN IM_REP_EN
> [root@molbio bin]# mt -f /dev/nst1 status
> SCSI 2 tape drive:
> File number=0, block number=0, partition=0.
> Tape block size 0 bytes. Density code 0x46 (no translation).
> Soft error count since last status=0
> General status bits on (41010000):
> BOT ONLINE IM_REP_EN
>
> and if i add:
> [root@molbio bin]# mtx -f /dev/sg5 load 2 1
> [root@molbio bin]# mt -f /dev/nst0 status
> SCSI 2 tape drive:
> File number=0, block number=0, partition=0.
> Tape block size 0 bytes. Density code 0x46 (no translation).
> Soft error count since last status=0
> General status bits on (41010000):
> BOT ONLINE IM_REP_EN
> [root@molbio bin]# mt -f /dev/nst1 status
> SCSI 2 tape drive:
> File number=0, block number=0, partition=0.
> Tape block size 0 bytes. Density code 0x46 (no translation).
> Soft error count since last status=0
> General status bits on (41010000):
> BOT ONLINE IM_REP_EN
>
> now both are loaded.
>
> it seems the drives are reversed somehow. i don't really understand.
>
> any help appreciated.
>
> -- michael
I had a similar situation awhile back. I think
my st0 corresponded to nst1, st1 didn't have nst equiv. Something
like that.
I don't know what O/S you're running there? It's
obviously different to mine.
You could try looking here:
ls -l /dev/st[0-9] /dev/nst[0-9]
Look at the major and minor numbers.
On linux, st? and nst? are created in order of discovery;
while mtx is talking about the library's internal concept of drive numbering.
Why they are out of sync: various possibilities. It could be
that your SCSI buses are wired up in an unusual way, although your lsscsi
above looks OK. Or something in the O/S config...?
Glen
--
Glen Davison
davo AT sirca.org DOT au
SIRCA Pty Ltd
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