Um.... A little too vague there... It all depends on the type of
data and the tapes...

        For 3590e drives we see somewhere between 30GB and 120GB per
tape depending on the compressibility of the data.
        For 3592 drives, it's somewhere between 300GB and 1TB per tape.

        So, in our case, we have actually fit 1TB of data on 1 tape,
nowhere near a 1000 tapes. 

Ben 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Lepre, James
Sent: Wednesday, December 22, 2004 7:46 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Tape Questions


Hello All,

    I have a question is there a rule of thumb for how many tapes will
be used, when using TSM.  I heard that for every Terabyte that is backed
up, 1000 tapes could be used.  I was just wondering, if anybody knew
something different.  I keep 2 versions for 7 days

Thanks

James