On Jul 18, 2007, at 8:18 AM, Paul Robertson wrote:
We did open a support call with EMC, and they suggested we needed
to enable
CDI; unfortunately, we had huge problems with CDI in the past (we
couldn't
read our tapes due to blocksize errors), so we're more than a
little gunshy.
We've decided to disable library-based autocleaning as well, and use
Networker periodic cleaning. I do have a couple of questions after
reading the documentation:
o Networker appears to require that I specify the library slots
associated with the cleaning tapes. Does networker care about the
labels on those tapes? We don't currently have "CLNxxxx" labels,
and want to make sure that's ok.
In my experience, NetWorker doesn't care about the labels on cleaning
tapes. Your tape library might care, even with its auto-cleaning
feature disabled.
o Since our tape drives are shared between the Networker server and a
storage node, I'm wondering about how to define the cleaning
frequency for the drive to avoid conflicts. For example, a single
tape drive has device definitions /dev/rmt/2cbn as well as
rd=racnyc03:/dev/rmt/2cbn. How would I configure networker assuming
that I want to clean the tape drive once a month? I would assume
that
I would define periodic cleaning just one of the two device
definitions
(e.g. /dev/rmt/2cbn), but wanted to check.
If all the tape drives are shared, you can probably get away with
just allowing one storage node to handle tape drive cleaning. I don't
have any shared tape libraries in my environment; however, I do have
each device set up to check for cleaning once a day. This is just a
check; if NetWorker checks and a device does not need cleaning,
NetWorker won't load a cleaning tape into that drive, so I figured I
might as well just have NetWorker check daily. This with NetWorker
7.2.1 server under Solaris 9. I imagine later versions handle tape
cleaning the same way.
--
Stan Horwitz
Temple University
Enterprise Systems Group
stan AT temple DOT edu
CONFIDENTIALITY STATEMENT: The information contained in this e-mail,
including attachments, is the confidential information of, and/or is
the property of, Temple University. The information is intended for
use solely by the individual or entity named in the e-mail. If you
are not an intended recipient or you received this in error, then any
review, printing, copying, or distribution of any such information is
prohibited. Please notify the sender immediately by reply e-mail and
then delete this e-mail from your system.
To sign off this list, send email to listserv AT listserv.temple DOT edu and type
"signoff networker" in the body of the email. Please write to networker-request
AT listserv.temple DOT edu if you have any problems with this list. You can access the
archives at http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
|
