Migration involves moving between primary storage pools.
The conventional situation was ( before VTLs) a site would have a hierarchy
of storage. The clients would back up to disks to permits a large number of
concurrent backups, then those backups to disk would be migrated to tape.
Both are primary storage pools.

Copypools are copies of data in primary storage pools. Their purpose is to
provide for the loss of data in the primary pools and are populated using
backup stg to the copypool. Fio example, a tape volume goes bad in your
primary storage pool, you can recover it from the copypool.

Copypools are also used at some sites for vaulting. The copies of the
primary data that is created on the copypools is sent offsite.

----- Original Message -----
From: "Dollens, Bruce" <BDollens AT TXFB-INS DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Monday, October 01, 2007 12:35 PM
Subject: [ADSM-L] Migration question


I have a question that I feel a little stupid in asking.

What is the difference between migration and backup primary (disk) to
copy (tape)?

I am working on changing my scheduling up and the recommended order of
steps I was given is:

Backup clients
Migration
Backup primary to copy
Backup db
Expiration
Reclamation
Start all over again

Thanks!