Some of these comments are interesting as what I am hearing from Quantum
is  big investment in DLT-S4. These drives will deliver 800GB native so
these would be 1.6TB tapes with average 2:1 compression.

There are also in built enryption benefits and DLT-Ice for Worm
considerations, down side (I think) there is very limited backward
compatibility. For me the speed issue is less of a concern given that I
tend to use Virtual Tape and then duplicate to real tape at leasure, I
do like the DX Series boxes from quantum as they scale down to workgroup
style boxes, they have a good story with speed given the way they write
the files to disk and just around the corner they will do some very
fancy (virtual) media duplication and moving things in box.

I am giving DLT-S4 a good look for some customers who are at the cross
roads you are at.

David Mackie
Infrastructure Architect - Director

Synergistic Network Solutions Pty Limited
PO Box 6201 
Conder, ACT 2906
Australia
Email: David.Mackie at synergistic.com.au
Http://www.synergistic.com.au
http://www.linkedin.com/in/davidmackie

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Ed Wilts
Sent: Tuesday, 8 August 2006 3:29 AM
To: Martin, Jonathan (Contractor)
Cc: veritas-bu at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] SDLT 600 vs LTO3 ?!

On Mon, Aug 07, 2006 at 11:46:16AM -0400, Martin, Jonathan (Contractor)
wrote:
> Does anyone have any guidance on this issue or interaction with both 
> types of drives?  We're looking into upgrading our aging quantum 
> library here and trying to put together a business case for one over
the other.
> I like the 800GB per tape and higher transfer speeds of LTO3, but 
> being an SDLT220 shop now, I'm keen on the SDLT 600 backwards
compatibility.

We were in the same situation and what we did was to add a bunch of LTO3
drives and retire all but a couple of SDLT 220 drives.  

> I haven't priced tapes yet, but that could also be a determining
factor.

Yup.  Cost per MB is far cheaper on LTO3 than SDLT600.  Whether you
purchase SDLT 600 or LTO3, you'll be replacing all of your media.

The LTO3 drives are cheaper.  The media is cheaper.  The drives are
faster.  Even Quantum recommends the LTO3 drive for day-to-day
operations.

> Any real world horror stories or analysis anyone had done would be 
> appreciated.  From what I gather reading the list mostly everyone has 
> gone LTO / I don't think I've seen SDLT 600 mentioned once!?

SDLT is a dying technology...

        .../Ed

--
Ed Wilts, Mounds View, MN, USA
mailto:ewilts at ewilts.org
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