[Veritas-bu] Question with Tape Compression: Is it possible to turn it off?

[Justin Piszcz]

Hello,

If you backup highly compressed files, it carries with it anywhere between 
1-5% overhead overall.

Example: 400GB LTO-3 Tape
Example: ~367GB and the tape is FULL:

LTO-3 TAPE:
XXXXXX   9     44   12/10/2009 04:46  12/10/2009 10:13  hcart3   367050755     0
               MPX   INFINITY              N/A         FULL

You can disable compression on a tape drive using the mt command, however, 
NetBackup will re-enable it: