Veritas-bu

[Veritas-bu] compression and DLT 7000

2001-02-16 15:25:59
Subject: [Veritas-bu] compression and DLT 7000
From: Frédérick Coutret frederick.coutret AT par.sita DOT int
Date: Fri, 16 Feb 2001 15:25:59 -0500
70 GB is only a theorical backup size in compressed mode calculated with the
nominal backup size 35 GB.
But sometimes, especially when you backup empty databases, the compression
can be more than 2:1
and you can backup 3 or 4 times more than the nominal size



----- Original Message -----
From: "clifford thurber" <cthurber AT concretemedia DOT com>
To: <veritas-bu AT mailman.eng.auburn DOT edu>
Cc: <nbu-lserv AT datastaff DOT com>
Sent: Friday, February 16, 2001 3:05 PM
Subject: [Veritas-bu] compression and DLT 7000


> Hello,
> We are using Netbackup 3.2 on Solaris 7 with Quantam DLT 7000 Drives. We
> have the following line in our st.conf file
> DLT7k-data =    1,0x36,0,0x9639,4,0x84,0x83,0x0,0x85,3;
> Which I believe denotes that we have 70GB of storage in  compressed mode.
I
> also believe that this is the theoretical limiton DLT 7000's using
> compression. The confusing part is that when I run the media list report I
> see tapes that are 87GB, 129GB and 111GB. Can someone tell me how this is
> even possible? Veritas was not able to give me an answer to this? Thanks
in
> advance I will summarize.
> Clifford
>
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