We made the move from VTL to DD VTL by moving the tapes in order of oldest to 
newest.  The theory being that all of those notepad copies that are 5 years old 
could be on the same tape and it should reduce reclaims.
Out of curiosity, how big are you making you files on the DD?

Andy Huebner

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Richard Rhodes
Sent: Wednesday, February 09, 2011 8:30 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] strategy for migrating to new library strategy

Hi everyone,

We will be shortly be helping with a DataDomain (DD)
installation, and we are looking for how best to move
the primary pool from the old tape pool to the DD.
The DD will be used as a NAS device via a file type pool.

Currently, there is the normal DISK->TAPE hierarchy
of primary pools with the need to get to DISK->DD.


1)  use movedata

chg DISK nextpool to DD
chg DD nextpool   to TAPE
movedata from TAPE to DD

current:     DISK->TAPE
transition:  DISK->DD->TAPE   movedata TAPE back to DD to clear out old
pool
final:       DISK->DD

We control the movedata process with scripts.


2)  use migration

chg DISK nextpool to DD
chg TAPE nextpool to DD
migration from TAPE to DD

current:     DISK->TAPE
transition:  DISK->DD<-TAPE   migrate TAPE to DD to clear out old pool
final:       DISK->DD

Migration runs process automatically.


3)  Other ???????

Are they any other ways do this?


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