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I think that you're describing two different things. "pool" in NBU, 
refers to a volume pool, which you *can* have one or many. What I think 
you are referring to as "pool", NBU calls a storage unit, which is a 
logical grouping of storage device(s).

If you want the system to backup to whichever storage unit is available, 
you would create three storage units; two comprising of robot/LTO, and 
one comprising of robot/DLT.  In your policies, you could choose 
"any_available" when assigning a storage unit. I don't believe that NBU 
will have a problem with the fact that you have introduced a second 
drive format into your robot, but, I'm not positive of the 
ramifications. My understanding is that NBU is smart enough to choose 
the correct media type and drive type for your backups.

Perhaps, someone else could comment.

--Steve

Koonz, Jay wrote:

>I have a Veritas DataCenter 4.5 server with 2 tapes libraries, a StorTek L40
>with 2 LTO drives, and a StorTek L80 with 2 LTO drives and one DLT drive. 
>Is it possible to have one large Netbackup pool for both libraries that
>would use whatever LTO device in whatever library was free at the moment ?
>Of course, each library would have a bunch of free tapes for the pool
>mounted. I'd treat the single DLT drive as a seperate pool for particular
>backups. 
>
>
>Jay Koonz
>Sr. Systems Engineer
>USCO Logistics
>Member, Kuehne & Nagel Group
>22 Spencer Street
>Naugatuck, CT 06770
>Ph +1 203 597-5317
>mailto:jkoonz AT usco DOT com
>
>
>_______________________________________________
>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>  
>


-- 
===================================

  Steven L. Sesar
  Senior Operating Systems Programmer/Analyst
  UNIX Application Services R10A
  The MITRE Corporation
  202 Burlington Road - KS101
  Bedford, MA 01730
  tel: (781) 271-7702
  fax: (781) 271-2600
  mobile: (617) 893-9635
  email: ssesar AT mitre DOT org
 
===================================


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