This happens regularly when we do a cold backup of Oracle Data files. Even
though the file is 10GB, 1-5GB of it is likely empty white space. This
compresses down to nothing through the DLT hardware compression. Netbackup
reports the amount of UNCOMPRESSED data stored on a particular tape. That's
the scoop.

Bill Schuller
Unix Systems Administrator
Cayenta, Inc.

-----Original Message-----
From: Coder, James (STP) [mailto:james.coder AT guidant DOT com]
Sent: Wednesday, March 14, 2001 2:15 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] tape capacity reporting


I notice on occasion that we have dlt tapes showing a capacity of greater
than 70gb from NetBackup (Unix NetBackup, ver. 3.2 running with a 9740
robot).  I understand how this can happen, but to see in excess of 100gb for
a full tape, I have to wonder!  Can anyone share their theories with me?
Maybe I'm just lucky and don't know it!


Thx in advance 




James C. Coder
Guidant CRM
email: james.coder AT guidant DOT com
Phone:  651-582-4797

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