Hi Raymond,
It is indeed an issue with the udev environment within Linux, I had a
similar problem with some EMC EDL/CDL boxes. These have an Embedded Storage
Node facility that run Linux. On a customer that I have been working at we
recently upgraded the firmware and as a matter of course the Linux
installation and we discovered a bug with the implementation of udev. Every
reboot, even when using persistent binding (/dev/tape/by-id/xxxxxxx-nst)
would have problems, once we added the udev patches everything worked fine.
I don't have a link to the exact problem however there is a solution on
powerlink that goes into to the problem. Incidentally the flavour of Linux
was SuSE/Novell, so the tech support section on their website may also
provide information to help resolve your issue.
Thanks,
Mark.
On 3 November 2010 19:07, Davis, Raymond P <
Raymond.P.Davis AT questdiagnostics DOT com> wrote:
>
> Hi,
>
> We have a Quantum LTO Tape library with a bunch of drives. Our Linux
> networker server sees one of the partitions. We have just finally
> implemented persistent binding on the Linux host and things are working
> better. Before that, we needed to reconfigure the tape library with
> every Linux reboot. The next issue seems to be when a tape drive goes
> awry, it loses its drive mapping and issues a SCSI reset, which in turn
> reorders the tape drives dynamically. Has anyone else had this
> experience and are there any ideas as to how to circumvent this problem.
>
>
> I have reached out internally to my Linux group who are looking into it.
> I asked Quantum and they know about it but don't have any solution for
> me as of yet. Finally, EMC says it's a Linux issue and not specific to
> networker. BTW, when this happens, we wind up needing to bring down 3
> separate netwoker environments and 3 library partitions, hard booting
> the library and rebooting the Linux networker server/ storage node.
>
> Thanks for any help.
>
>
> Raymond Davis
>
> Quest Diagnostics | Sr. Storage Engineer | 1200 Wall St West |
> Lyndhurst, NJ 07071 USA | phone +1.201.729.7882 | mobile
> +1.201.841.2335 | Raymond.P.Davis AT QuestDiagnostics DOT com |
> www.QuestDiagnostics.com
>
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