On Fri, 15 Dec 2000, John W. Sopko Jr. wrote:
> We have a strange intermittent problem doing AFS backups ever since
> we moved to AFS 3.6. Has anyone else experienced this problem?
> Any input would be appreciated.
>
> We do backups from our Sun E250's to Sun standalone DLT 7000 tape
> drives. We are running Solaris 2.7 with AFS Base configuration
> "afs3.6 2.3".
>
> Our full backups require 2 tapes. The first tape always completes
> fine. The second tape always continues fine. But, sometimes the second
> tape "freezes". That is the backups stop running on the second tape.
> There are no messages in the butc window, we run butc
> with a debug level of 1. There are no messages in the
> /usr/afs/backup/TE_rmt_0u or TL_rmt_0u logs. There are no messages on
> the console or the system log /var/adm/messages. The only clue is
> in the backup prompt:
>
> backup> status
> Task 1: Dump: 11033914 Kbytes transferred, volume
> D1.prj.stm.da.gt.nM.fi.backup
> Task 2: Dump: [drive wait]
>
> We start the entire dump over and it usually works the next time.
>
> I realize there is a new AFS 3.6 patch release. I read the
> readme.txt and it did not indicate a fix for this. Any ideas?
John,
According to the AFS docs, "[drive wait]" occurs when "The operation is
waiting for the specified tape drive to become free". (See
http://www.transarc.ibm.com/Library/documentation/afs/3.5/unix/adm/adm12.htm
and search for "drive wait")
You don't have any processes which might be disrupting or restarting butc
or otherwise trying to use the tape drive at the same time do you?
FWIW, we have a similar setup next door in Phillips (3 E250 servers,
sun4x_57, DLT 7000 drives, afs3.6 2.3, backups take multiple tapes...) and
have not experienced this particular problem.
I would be interested to know if installing afs3.6 2.5 solves your
problem (or what the ultimate solution is)...
Cheers,
Stephen
--
Stephen Joyce
Systems Administrator P A N I C
Physics & Astronomy Department Physics & Astronomy
University of North Carolina at Chapel Hill Network Infrastructure
voice: (919) 962-7214 and Computing
fax: (919) 962-0480 http://www.panic.unc.edu
