A VTL offers following advantages compared to a TSM file device class :
 
(hardware) compression on the VTL itself
SAN based backups are possible with a VTL
 
regards,
Kurt

________________________________

Van: ADSM: Dist Stor Manager namens Allen S. Rout
Verzonden: do 1/5/2006 5:45
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: Re: [ADSM-L] VTL experiences?



>> On Wed, 4 Jan 2006 14:42:29 -0600, "Dearman, Richard" <rdearm1 AT UIC DOT 
>> EDU> said:

> Anyone out there have any good or bad experiences with VTL solutions.  I
> was thinking about budgeting for 1 or 2 in order to phase out the
> current san file system I am using for TSM disk storage.  There are
> several vendors out there with VTL solutions most notably IBM and EMC.
> My first choice would be to choose IBM but it is a new product and EMC
> has been in the market longer.

Would you be willing to expound on why you'd prefer sticking disk
behind a VTL volume virtualizer, instead of sticking it behind a
DEVCLASS=FILE volume virtualizer?  I would default in the other
direction, so I'm interested in your thinking.


- Allen S. Rout