LTO2 can expect 60-70MB/s at 2:1 compression (range depends on drive 
manufacturer), anything above that is gravy.  Granted, it's not uncommon 
for me to see 580GB on a 200/400 LTO2 tape, it's not something you can 
depend on.  The spec says 30-35/60-70 for LTO2 with/without compression.

I can't seem to find a URL for a pre-written comparison, I may have to 
write one.  Here are the details:
LTO2    native/compressed MB/s
IBM    17.5-35/70
HP       10-32/64
Seagate  12-34/68

And keep in mind, if you try to hardware compress software compressed 
data, it will be slower and the tape will hold less.


----Original message----
Date: Fri, 22 Sep 2006 09:54:15 -0400 (EDT)
From: Justin Piszcz <jpiszcz at lucidpixels.com>
Subject: Re: [Veritas-bu] LTO3 and Disk Staging
To: "Weber, Philip" <Philip.Weber at egg.com>
Cc: veritas-bu at mailman.eng.auburn.edu, Ed Wilts <ewilts at ewilts.org>
Message-ID: <Pine.LNX.4.64.0609220953530.3623 at p34.internal.lan>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

The drive limit of LTO2, I have benchmarked at speeds of 90-94MB/s,
sustained.  Around 137-138MB/s for LTO3.

Justin.


-- 
Joe Royer / SysAdmin / Digital Motorworks / 512-692-1028


This message and any attachments are intended only for the use of the addressee 
and may contain information that is privileged and confidential. If the reader 
of the message is not the intended recipient or an authorized representative of 
the intended recipient, you are hereby notified that any dissemination of this 
communication is strictly prohibited. If you have received this communication 
in error, please notify us immediately by e-mail and delete the message and any 
attachments from your system.