Re: ADSM Copypool and DRM Questions
1997-05-05 07:35:04
Subject: |
Re: ADSM Copypool and DRM Questions |
From: |
Christo Heuer <christoh AT ABSA.CO DOT ZA> |
Date: |
Mon, 5 May 1997 13:35:04 +0200 |
> Dennis Hatch wrote:
> >
> > We plan on backing up all servers to our primary pool of DASD and
> > cartridge media. We estimate our cartrigde use to be about 1000 tapes.
> >
> > The users require weekly off-site backups of all servers for D/R
> > reasons. I know I can use copy pools of the primary pool to do this,
> > but the volume of cartridges and the time to create these on a weekly
> > basis is outside our limits. I have also looked at the DRM option, but
> > still run into these constraints.
>
> It sounds as if you are thinking in terms of copying the 1000 or so
> on-site tapes to a similar number of off-site tapes each time an
> offsite backup is done. Copy pools don't have to be used this way.
> The first BACKUP STGPOOL operation will do a massive amount of
> file copying. Subsequent BACKUP STGPOOL operations will only copy
> files that are not already in the copy pool. In addition, if you
> execute a BACKUP STGPOOL from a disk storage pool to a copy pool,
> migrate data from disk to tape, and do a BACKUP STGPOOL from primary
> tape pool to copy pool, files that were copied from the disk pool
> by the first BACKUP will not be recopied by the second. If BACKUP and
> migration operations are scheduled appropriately, most of the copy
> pool updating can be done by copying data from disk to tape, with
> little need for tape to tape copies.
Tom,
After the initial copy to a backup stgpool (copypool on tape) and your tapes go
off-site. How do you do another backup to your copy pool without a lot of
manual
intervention? (Like bringing the backup copy pool tapes on-site and marking
them as
on-site etc...
Regards
Christo Heuer
Johannesburg
South Africa
Christoh AT absa.co DOT za
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