Robert,

This is also how I understand it.  Quoting the Admin Guide:

"A backup set is a collection of backed-up data from one client, stored and
managed as a single object on specific media in server storage. "

This can also be evidenced by the fact that if you issue the command: QUERY
BACKUPSETCONTENTS the server will have to mount the media in order to scan
it for the content information.  Backupsets are essentially
"self-describing" instant archives.  HTH.

Chris Murphy
IT Network Analyst
Idaho Dept. of Lands
Office: (208) 334-0293
cmurphy AT idl.state.id DOT us


-----Original Message-----
From: Coats, Jack [mailto:Jack.Coats AT BANKSTERLING DOT COM]
Sent: Monday, April 21, 2003 12:55 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Backup Sets


someone else may be able to respond with more authority, but
IMHunderstanding, a backup set is a single entity in the TSM database, and
TSM has no continuing knowledge of the contents of a backup set. If you need
to modify one, you basically make a new one.  You can always delete an old
one if you need to, to recover tapes.  A backup set is a stand alone entity
after it is created.

So, the specific answer to your question is: No.  You cannot refresh or
append to a backupset.


> -----Original Message-----
> From: Klein, Robert (NIH/CIT) [SMTP:kleinr AT EXCHANGE.NIH DOT GOV]
> Sent: Monday, April 21, 2003 11:48 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Backup Sets
>
> I am looking into the suitability of backup sets for long term storage
> of offsite copies of data.  The idea is to make a backup set and then
> eject the
> tapes from the silo.   The only problem is that new files keep getting
> added
> to the filespace.  If I create another backup set, say with the same
> first level name is the first backup set, will all the files in the
> filespace get copied to the new backup set, or only the new ones which
> were created since
> the first backup set was created?  I could not tell from the manual's
> description  The user needs to keep these files on disk for several years,
> so the old files would still exist on the disk when the new backup set is
> created.
>
> Thanks for any clarification you can provide.