On Tue, 24 Jul 2007, briandiven AT northwesternmutual DOT com wrote:

> We get around 6-8 restore requests/day.  And yes, I take advantage of
> Inline Tape Copy and have a copy available across dark fiber at a
> separate campus and the other copy vaulted 90 miles away.  If we have
> time, I rerun (or dupe) any status 84's we get.  I'm using IBM for tape
> - 3590's and 3592's in a 3494 ATL, but just brought in a TS3500 which is
> supported behind a VTL. The 3592's are reliable beyond any tape drive I
> have seen in my life - however the 3590's are about on par with any
> other technology.

Have you used other vendor tape drives such as HP or StorageTek?  I have
been hearing a lot of good things regarding IBM LTO tape drives.  I do
have another question for you as well.  What are your cleaning cycles
set to?  How often do you clean your tape drives?  What types of
cleaning tapes do you use?  Do you (or anyone else on this list) who
uses L700s ever have cleaning tapes get 'stuck' in the tape drives when
you have NetBackup either schedule a cleaning or clean the drivee
manually?

Furthermore, how long do you use your tapes for?  Do you base this
estimate on total number of mounts?  When you write to your tapes, do
you fill them up from beginning to end or mount them multiple times?

You seem to have a pretty rock solid environment, I assume you're
running NetBackup 6.0MP4 currently?  Have you run into any other weird
bugs with that (and all of the policies) vs. 5.1MP4 besides the ones you
mentioned yesterday?

Justin.

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