Veritas-bu

[Veritas-bu] DDS-3 tape capacity

2003-06-09 17:15:57
Subject: [Veritas-bu] DDS-3 tape capacity
From: jmcdon23 AT csc.com DOT au (jmcdon23 AT csc.com DOT au)
Date: Tue, 10 Jun 2003 07:15:57 +1000
Hi

The  missing 4 GB and possibly more  is a measure of the compressibility of
your data.
24 GB represents optimal compression.

If you tried  backing up compressed data there is a possibility that the
backup size is greater than the original.
In that case you would get less than  12 GB on a DDS3.
If you are on HP use /dev/rmt/*BEST* to get optimal hardware compression.

Regards
Jim McDonald
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"Teklu, Daniel" <daniel.teklu AT tfn DOT com>@mailman.eng.auburn.edu on 
10/06/2003
05:34:48 AM

Sent by:    veritas-bu-admin AT mailman.eng.auburn DOT edu


To:    veritas-bu AT mailman.eng.auburn DOT edu
cc:
Subject:    [Veritas-bu] DDS-3 tape capacity


DDS-3 tapes I use have 12 Gig Native/24 Gig compressed. What should I do to
get the full 24 Gigs space? On most case it does  not go more than 20 Gigs.
On some drives it is even worst like

DIG004  4MM      TL4      1       2      -       6     10626176 FULL
DIG008  4MM      TL4      1       4      -       6     10853344 FULL

On 10 Gigs and they show as FULL already. Any suggestions please?

Thanks
-Daniel


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