Well that looks pretty good 
Not sure if you are comfortable sharing info like this but what kind of
data does that represent?

Normal User File data?
Database data?
Media Files?


-----Original Message-----
From: Justin Piszcz [mailto:jpiszcz AT lucidpixels DOT com] 
Sent: 02 March 2010 14:49
To: Shekel Tal
Cc: Kevin C; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Sun/StorageTek based LTO4 encryption



On Tue, 2 Mar 2010, Shekel Tal wrote:

> I have also been looking at this as an option.
> One of the considerations is the effect encryption has on compression.
>
> I have heard you loose the ability to compress effectively when using
> compression.
>
> Have you noticed an effect on your tape drive compression when using
> tape drive based encryption?
Yes.

LTO-4 TAPE = 800GB

IBM LTO-4 ENCRYPTED (RATIO = ~1.5:1)
ABCD25   3     67   02/17/2010 20:00  02/23/2010 00:00   hcart
1188618163     0
               MPX   03/26/2010 00:00        N/A         FULL ENCRYPTION

ABCD36   3    101   02/18/2010 00:12  03/02/2010 00:00   hcart
1239789810     0
               MPX   04/02/2010 00:00        N/A         FULL ENCRYPTION

IBM LTO-4 NO ENCRYPTION (RATIO = ~3.1:1)
ABCD49   2   1144   02/23/2010 02:43  02/26/2010 01:32   hcart
2451541654     0
               MPX   03/19/2010 02:49        N/A         FULL

ABCD50   2   1350   02/26/2010 01:32  03/01/2010 01:05   hcart
2377975447     0
               MPX   03/22/2010 02:05        N/A         FULL

ABCD51   2   1275   02/24/2010 20:01  02/27/2010 10:40   hcart
2575741349     0
               MPX   03/20/2010 11:40        N/A         FULL

Justin.

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