And don't forget <plug start> BACKPACK formerly Roadrunner <plug end>.

-----Original Message-----
From: Mark Klein [mailto:[log in to unmask]]
Sent: Thursday, November 22, 2001 8:11 AM
To: [log in to unmask]
Subject: Re: [HP3000-L] DLT8000 performance ?


Johan Beghein writes:

>I just tried a full backup on a new N4000 with DLT8000.
>
>The system is configured in the following way with the F/W interfaces
>(A4800A)
>
>Path:                0/4                        1/10
>0/12
>                                         mirror
>                       18GB   ---------   18GB
>DLT/8000

Good, that's correct. And, since this is an N class, you're using
the higher speed 10,000 RPM drives, correct?

>It took 5h30 to make a backup of 35GB on a DLT4 tape, with no other job
>running, in split volume backup mode !

Are you using TurboSTORE? Unfortunately, TS can not push the data through
even an unutilized channel fast enough. TS does not multiprocess enough
to keep a steady data flow and the DLT8000 is too fast for that. When it
gets into stop/start mode, performance can really suffer.

<plug alert>
I'd like to recommend you try Backup+ from ORBiT. HP ran some head to
head performance tests between Backup+ and TurboSTORE and Backup+ beat
TurboSTORE on large systems every time.
</plug alert>

I've taken the liberty of forwarding this to our UK office and either
they will contact you, or one of the other European offices will
contact you.

Regards,


M.

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