The only downside to not multiplexing is the number of drives you have
to create and configure as well as the number of virtual media you have
to create as well. Depending on the VTL, media can be created by
allocating all the virtual cart space up front of allocating space on
demand. So, if you VTL only allows you to create virtual media by using
the space up front, you'll be limited in # of tapes by capacity, which
might not be enough to mount into all of the virtual drives required for
each stream.

Other than that situation any MPX setting from 1-32 should work..

-Trey

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Travis
Kelley
Sent: Wednesday, April 30, 2008 1:41 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Multiplexing on VTL's

We recently purchased a VTL to backup some short retention backups to.
 The backups will expire on the VTL and will not be duplicated to tape
or anywhere else for that matter.  We also have capacity licensing so we
can create as many virtual tape drives as necessary.  I don't believe
multiplexing is necessary in a situation like this and that we would be
better off configuring enough tape drives to handle the number of
streams we need and turn multiplexing off.  Does anyone know of any
reason this logic would be flawed...and if not is there any
documentation out there to support that multiplexing is not a good idea
when using VTL's?
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_______________________________________________
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