Veritas-bu

Re: [Veritas-bu] LTO Generation 4 tape throughput with on-driveencryption

2007-12-17 14:49:23
Subject: Re: [Veritas-bu] LTO Generation 4 tape throughput with on-driveencryption
From: Justin Piszcz <jpiszcz AT lucidpixels DOT com>
To: Rajmund Siwik <Rajmund.Siwik AT conexant DOT com>
Date: Mon, 17 Dec 2007 14:27:27 -0500 (EST)
Thanks for reporting the results of your testing!

On Mon, 17 Dec 2007, Rajmund Siwik wrote:

> I have successfully tested LTO4 encryption with Quantum i500 and their
> version of encryption management software QEKM.
> We use NDMP for backups and it depends what data we dumping to tape but
> we were getting about 70MBs as reported by NBU which is what I would
> expect.
> However real speed of actual data dump was a little bit faster as NBU
> does not eliminate NDMP overhead.
> Overall I am satisfied with performance and we are starting to deploy
> it.
>
> --Rajmund
>
> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of JAJA
> (Jamie Jamison)
> Sent: Thursday, December 06, 2007 3:54 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] LTO Generation 4 tape throughput with
> on-driveencryption
>
> I'm researching the purchase of a new library with LTO generation 4 tape
> drives and am interested in using the on-drive encryption to encrypt my
> backup tapes so that if a box of tapes ever falls off of the Iron
> Mountain truck I'm not having to explain things to the board of
> directors and legal, update my resume and/or both. The spec sheets for
> the LTO-4 drives that I've seen claim throughput of up to 120Mbps, but
> as we all know the devil is in the details and for all I know that
> throughput could have consisted of writing extremely large files
> consisting of nothing but the letter "e" to tape, without using
> encryption. Has anyone upgraded to LTO gen 4 yet who is also using the
> on-drive encryption and if so what kind of throughput do you see on
> average. Any real-world, real-life information will be greatly
> appreciated.
>
>
> Thank You,
>
> Jamie Jamison
> ZymoGenetics, Seattle
>
>
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