I would update the storage pool to eliminate the "reclamation storage pool"
and just let reclamation go tape to tape.
and yes, toss that reclamation disk space over into the diskpool...

We have diskpools big enough to take in 24 hours worth of backups from
clients... (but we try to perform all backups between 18:00 & 06:00) then
during the day we migrate to tape, then misc house cleaning of which
reclamation is a part of and we go tape to tape, never have done it any
other way.

Dwight

> ----------
> From:         Gerald Wichmann[SMTP:gwichmann AT SANSIA DOT COM]
> Reply To:     gwichmann AT sansia DOT com
> Sent:         Friday, July 14, 2000 12:30 PM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Reclamation
>
> We have a magstar that just recently received an upgrade by adding a 2nd
> tape drive to it.. previously when doing reclamation we have our
> reclamation
> pool configured as 8GB of sequential file space on one of the internal
> drives. This worked great but there was a little thrashing going on during
> reclamation.. the reclamation process would start and copy data from tape
> to
> the pool. The pool would fill up fairly quickly and kick off migration
> back
> to tape.. with only 1 tape drive, the reclamation process would halt until
> migration finished.. and well it would alternate like that until
> reclamation
> was complete.
>
> Now that theres a 2nd tape drive, we have a problem..
>
> Reclamation starts and uses one of the drives. The pool fills up and
> starts
> a migration process which mounts a scratch tape in the 2nd drive.
> Reclamation fails because it fills up the reclamation pool and then
> basically keeps cycling until the migration pool frees up enough space to
> allow the reclamation process to continue. So in a sense theres still
> thrashing going on but with lots of failure messages in the activity log
> saying the reclamation pool is full.
>
> Now that there's two tape drives it seems logical to stop using the disks
> as
> a reclamation pool and just have reclamation go tape to tape. The disks
> were
> purchases specifically for reclamation but I suppose we could find other
> uses for them. My question is mostly just to pick everyone's mind about
> this
> configuration and what would be the best given this situation.
>
> Gerald Wichmann
> RS Engineer
> Sansia System Solutions
> 408-844-8893 work
> 408-844-9801 fax
>