Yes, that's exactly how NetBackup works.
I guess I don't understand why you would want to
overwrite the backup from the night before? My thought
is, what's the purpose of backup? If only to protect
you for a few hours, why not use tar or NT Backup?
If you want to do this, you can (in NBU 3.4) change the
retention level to 1 Day, which will expire the image
after one 24 hour period. But you still may run into
the same problem, because it is 24 hours from the time
the image finished writing to the tape.
In any case, that's another option...or simply
bpexpdate as Jason indicated.
David
Quoting "Marcel van den Berg (Devote)"
<marcelb AT interxion DOT com>:
> Hi Jason,
>
> I followed this procedure when I noticed the tape was
full. As we have
> just one tape available for each daily backup, the
tape will be full
> after one job (so each day the tape is full). To
repeat the procedure of
> executing bpexpdate each day is not something I am
looking forward to.
> Could be done by batchjobs and scheduled tasks but is
too complicated I
> think.
>
> Get the impression Netbackup cannot overwrite jobs on
a tape. It just
> appends jobs on tape 1, takes tape 2, if full takes
tape 3 etc. When all
> the jobs on tape 1 are over the retention period tape
1 is used again.
> Anyone confirms this?
>
> best wishes,
> Marcel
>
> -----Original Message-----
> From: Jewell, Jason T
[mailto:jj151001 AT exchange.daytonoh.ncr DOT com]
> Sent: Wednesday, May 23, 2001 1:36 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] overwrite tape
>
>
> When we have frozen and/or expired tapes we erase
them (magnet) and
> delete
> them from the media server and master server
databases, then re-insert
> them
> as new media (we use bpexpdate to delete from media
servers , then
> vmquery
> -deassignbyid and vmdelete to delete from master
servers, but we don't
> have
> 3.4 so it may be different). They will then
be "overwritten." This may
> be
> more work than you are looking for.
>
> That is one solution you could use without messing
with retention
> levels,
> but we also would be interested in hearing other
procedures.
>
> Jason Jewell
> NCR 1611 Main ST
> Dayton OH 45479
> 937-445-4173
>
>
> -----Original Message-----
> From: Marcel van den Berg (Devote)
[mailto:marcelb AT interxion DOT com]
> Sent: Wednesday, May 23, 2001 6:13 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] overwrite tape
>
>
> Hi,
>
> Might be a simple question but could not find an
answer in the archive
> nor on the site of Veritas nor in the manuals.
>
> We are using Netbackup Business Server 3.4.1 on
Windows 2000 using a
> Compaq tapelibrary. We have just one tape available
for every day in the
> week. So for every day there is a volumepool with one
tape in it.
>
> How can Netbackup be configuered that it overwrites
the tape at every
> backup? Now it appends the job to the tape, resulting
in messages
> 'unable to allocate new media for backup.... (96)
after a few
> successfull backup's
>
> Is the only way to control this the use of retention
levels?
>
> best wishes
> Marcel
> _______________________________________________
> Veritas-bu maillist - Veritas-
bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-
bu
> _______________________________________________
> Veritas-bu maillist - Veritas-
bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-
bu
> _______________________________________________
> Veritas-bu maillist - Veritas-
bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-
bu
>
<><><><><><><><><><><><><><><><><><><><>
David A. Chapa
Consulting Manager
DataStaff, Inc.
847 413 1144
http://www.consulting.datastaff.com
---------------------------------------
http://www.xbpadm-commands.com
NBU-LSERV AT datastaff DOT com - Adv. Scripting
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