On a 12 GB tape, you can fit 12GB of random data (data that won't
compress).   You got 15, which means the data you're backing up can be
compressed approximately 1.25 to 1.

The 24GB has NOTHING to do with the capacity of the tape, unless of
course you just happen to have data which compresses at 2:1.

This is marketing fluff, which in my book is about as annoying as
people who sell gas for something-point-9 cents.

You might check the device file you're using, and make sure it's the
right one, but 1.25 to 1 is not uncommon.

Daniel Teklu writes:
> I use 4mm , 12GB/24GB(compressed) tapes. Netbackup always says FULL while
> they are apprx. 15 Gigs. The max. it got was to 17 Gig. It never goes to
> full capacity of the tape(24 Gig).
> 
> Any clue why? 
> 
> Thanks
> Daniel 
> __________________________________________________
> Do You Yahoo!?
> Send FREE video emails in Yahoo! Mail!
> http://promo.yahoo.com/videomail/
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

-- 
Larry Kingery 
            Enter any 11-digit prime number to continue...