Hi,

you could try to manually do the restores per filespace. This would mean
al lot more work from you, but you get at least the performance of 8
tapedrives (maybe build a script to do so?) Alternatively, just start te
restore of all 7 servers at the same time, this will use only 7 of the 8
drives, allow for some overlap in mounting/unmounting actions.

10 GB/h is about 2.8 MB/s, meaning you probably have a lot of
reclaimable space on your tapes, or the tapedrives are not streaming
because of some botteneck. DLT7000 has a native transferrate of 5 MB/s,
meaning that with compression you should be able to get maybe 8 or
better....

On donderdag, augustus 22, 2002, at 04:22 , Cahill, Ricky wrote:

I'm trying to find some figures to get an idea if the performance I'm
getting on restores is correct or I have a problem.

Config is:-
Storagetek L180 Library with 8xDLT7000 drives
Connected to the TSM server by cable to 3xAdaptec2940UWD controllers

Doing restores from the collocated primay pools I'm getting 10gb an
hour.

From a non collocated pool (offsite) I'm getting about 5-7gb an hour.

Has anyone got any figures on restores using DLT7000's as we're going
through the process of doing DR and having to
restore 7 Netware servers with 1.4tb at the above speeds is going to be
painful.

PS...ANy hints and tips on doing large restores and how to speed them up
greatly apreciated as well ;)

Thanks in advance.

             ..........Rikk

iTNET
Rikk Cahill
3rd Line Server Support
ricky.cahill AT itnet DOT com
Equitas London 0207-342-2358

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