It all comes down to retention, retention, retention.
NetBackup does not by default allow differing retentions to be on the same tape.
It is possible to have a tape with 9 months retention that is only used by 1 
policy/schedule and have only a couple of GB on it.
You can have many ? filled tapes in you environment.
SSO shares tape drives but not tapes. each media server has it's own store of 
tapes assigned to it.
Offsite tapes are also usually not full.
 
Between SSO and vaulting, many users do not see any benefit in the larger 
capacity tapes :-(
 
 


>>> "Sixbury, Dan" <dsixbury at hrblock.com> 10/31/2006 2:07 PM >>>


How do you determine the efficiency of your tape usage?  i.e. I was just asked 
recently about our use of LTO3 tapes since they can hold up to 800 GB 
compressed, how much we were actually consuming.  i.e. if we are getting our 
money's worth for the larger capacity more expensive tapes.
Thanks 
Dan 

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