Hi,
        When a request for a pool tape comes in the following steps are
performed in order and as soon as a match occurs the tape gets mounted:

1. First of all a mounted appendable volume from that pool will be
chosen

2. Next a non-full jukebox volume is chosen. All the jukeboxes are
considered at
once but only those jukeboxes that are not all currently busy get
selected. Of
the eligible volumes in the jukebox the volume that is the oldest (One
labeled
at most distant time in the past) will be chosen first.

3. A recyclable jukebox volume is chosen using the same criteria as in 2
above

4. A non-jukebox volume will be chosen

5. When all else fails and no volume is available the administrator is
asked to 
label a new volume. This is through generating a pending tape mount
request.

Courtesy : powerlink :)

HTH
Rovin D'Souza 
rovinabi AT gmail DOT com
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of George Sinclair
Sent: Wednesday, August 04, 2010 11:09 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Tape selection criteria?

I've never been completely clear on NW's selection of tapes when running

backups:

Scenario: If there are two or more nearline, appendable volumes (*not* 
marked read-only) in pool A, and neither is currently mounted in a 
drive, and NW requests a writable tape for pool A, which tape will it 
choose to load?

Does it pick:

a. the one that was last written to?
b. the one with the oldest label date (olabel)?
c. something else?

What about when requesting clone volumes? Assuming the same scenario, is

the same criteria used?

Thanks.

George

-- 
George Sinclair
Voice: (301) 713-3284 x210
- The preceding message is personal and does not reflect any official or

unofficial position of the United States Department of Commerce -
- Any opinions expressed in this message are NOT those of the US Govt. -

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