On Fri, Jan 09, 2009 at 05:51:26PM +1100, Glen Davison wrote:
> Michael Galloway <mgx AT ornl DOT gov> wrote on 09/01/2009 09:56:08 AM:
> 
> > 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.
>

its centos5:
[root@molbio ~]# cat /etc/redhat-release 
CentOS release 5 (Final)

[root@molbio ~]# uname -a
Linux molbio.ornl.gov 2.6.18-8.1.14.el5 #1 SMP Thu Sep 27 19:05:32 EDT 2007 
x86_64 x86_64 x86_64 GNU/Linux

 
> You could try looking here:
> 
> ls -l /dev/st[0-9] /dev/nst[0-9]
> 
> Look at the major and minor numbers.
>

[root@molbio ~]# ls -l /dev/st*
crw-rw---- 1 root disk 9,  0 Jan  9 07:28 /dev/st0
crw-rw---- 1 root disk 9, 96 Jan  9 07:28 /dev/st0a
crw-rw---- 1 root disk 9, 32 Jan  9 07:28 /dev/st0l
crw-rw---- 1 root disk 9, 64 Jan  9 07:28 /dev/st0m
crw-rw---- 1 root disk 9,  1 Jan  9 07:28 /dev/st1
crw-rw---- 1 root disk 9, 97 Jan  9 07:28 /dev/st1a
crw-rw---- 1 root disk 9, 33 Jan  9 07:28 /dev/st1l
crw-rw---- 1 root disk 9, 65 Jan  9 07:28 /dev/st1m
[root@molbio ~]# ls -l /dev/nst*
crw-rw---- 1 root disk 9, 128 Jan  9 07:28 /dev/nst0
crw-rw---- 1 root disk 9, 224 Jan  9 07:28 /dev/nst0a
crw-rw---- 1 root disk 9, 160 Jan  9 07:28 /dev/nst0l
crw-rw---- 1 root disk 9, 192 Jan  9 07:28 /dev/nst0m
crw-rw---- 1 root disk 9, 129 Jan  9 07:28 /dev/nst1
crw-rw---- 1 root disk 9, 225 Jan  9 07:28 /dev/nst1a
crw-rw---- 1 root disk 9, 161 Jan  9 07:28 /dev/nst1l
crw-rw---- 1 root disk 9, 193 Jan  9 07:28 /dev/nst1m

st0 and nst0 have lower 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...?
>

this same configuration worked as expected before i swapped out the library (its
been making backups for a year, then replaced library with factory 
replacement). 

-- michael
 
> 
> Glen
> 
> --
> Glen Davison                      davo AT sirca.org DOT au
> SIRCA Pty Ltd                      Ph (02) 9236 9133

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