On Wed, 22 Aug 2001, Alonzo, Alex wrote:
>To All
>We are running netbackup 3.4 on a Unix platform with 2 media servers
>and 1 master, both media servers have a STK 9710 robot attached with 6
>DLT 7000 tape drives & about 406 tapes per robot. Are clients (112)
>are Unix HP's & SUN's, NT 4.0 and win2000. Our current load requires
>about 12 hours nightly to complete our backups using both robots over
>a dictated 100mb cat5 Ethernet network.
>My question is how are most folks cleaning there DTL drives ? are you
>configured for Veritas to do it or are you allowing STK to clean when
>required ?. Are problem lately is one robot is cleaning about 16 times
>per night, we currently have STK do the cleaning so we have no
>visibility on which drive or drives are making the request. We don't
>see any tape media error in the logs, we remove tape with 100 mount or
>more, we don't see any patterns with the media. The drives don't ever
>go down so we get no messages with any drive problems. This behavior
>is new are typical over night cleaning is about 4 - 5 times per night
>are typical total bytes we backup per week is about 3TB. Can anyone
>share some experience, thanks
>
>Alexander Alonzo
>E-Enterprise
>TRW Space & Electronics Group
>
>*? alex.alonzo AT trw DOT com
>* 310.814.6097
>
>_______________________________________________
>Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
We also have STK 9710 (574 slots, 5 DLT 7000), and we defined it to be
cleaned when needed, so the robot takes care of it. This was a very
clear recommendation of our H/W support.
We had the same problem a couple of months ago, and it is impossible to
know which drive does it, not even with the robot tests that the
technicians ran.
In any case the problem disappeared by itself after finishing a good
number of tapes. Our support suspects some of our tapes cause it.
Miriam
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Miriam Ben-Haim E-mail: miriam AT technion.ac DOT il
Unix Systems Phone : +972-4-8292177
Taub Computer Center Fax : +972-4-8236212
Technion - Israel Institute of Technology, Haifa 32000, ISRAEL
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