Veritas-bu

[Veritas-bu] Tape contents determining factor ... Similar ret ention periods .. . or just space and same volume pool?

2004-05-04 09:11:31
Subject: [Veritas-bu] Tape contents determining factor ... Similar ret ention periods .. . or just space and same volume pool?
From: Robert.Stump AT dla DOT mil (Stump, Robert (Contractor) (DRMS))
Date: Tue, 4 May 2004 09:11:31 -0400
The default setting for NetBackup is to NOT allow multiple retentions per
media.
This is however a selectable option for each media server located on the
"media" tab.
Image retention periods by default should not reside on a single media.
The expiration dates may be different depending when the image was created.
If you have a retention period of 1 month and the tape is marked frozen
then it will only take 1 month for the tape to have all expired images on it
and the tape will be made available for reuse when it is marked unfrozen.

with allow multiple retentions per media enabled. If the majority of images
are 
1 month retention and one image gets written to it with a 7 year retention
then the media will not become available for scratch until the 7 years
expire.

-----Original Message-----
From: Mike Day [mailto:MDay AT qrs DOT com]
Sent: Monday, May 03, 2004 6:47 PM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] Tape contents determining factor ... Similar
retention periods .. . or just space and same volume pool?


What's the determining factor as to which tape is used for a backup?  

I've always been under the impression that tapes contain data from similar
retention periods and same expiration dates.  I've been looking at the
'Images on Media' reports and have noticed that it varies for retention
periods (mixed at times) and expiration dates (inconsistent) but definitely
the same volume pool.

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