That property only applies if you are using the HSM client. It means that a backup version must exist in a TSM backup storage pool before the file is even eligible to be pushed out to an HSM storage pool due to x days of non-use. (The reason for the property has to do with how you would recover a damaged HSM pool, disater recovery, etc)
Unfortuately there are places where the manuals use the term "migration" for two different things 1) using the HSM client for disk grooming, which actually MOVES seldom-used files off the client machine to a TSM-HSM pool, and 2) relocating backup versions from a primary disk pool to a sequential (usually tape) pool. It's confusing. I think it may be explained in the old old redbook that described how the HSM client works, if that book still exists... -----Original Message----- From: Jolliff, Dale [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 12, 2002 8:19 PM To: [EMAIL PROTECTED] Subject: Re: Management class question For the MIGRATIONREQUIRESBACKUP property, the Admin Reference guide says "Specifies whether a backup version of a file must exist before the file can be migrated" doh. Is there a better explanation of this property somewhere?