Backup Jobs run around 390 MB/Min where restores & verify runs at 32MB/Min?

Posted on 2004-11-02
Last Modified: 2010-04-03
Here is what I have.
My Exchange server is Win2000 SP4 with Exchange 2000 latest SP.
Compaq ML370, dual processors, 500MB RAM.
Information Store=8GB
Compaq RAID5, Acceleration turned on.
Tape drive is a Cybernetics Library (IBM Ultrium LTO-2) connected via iSCSI.
Veritas Backup Exec 9.1 with latest patches.
Hardware compression if available, otherwise none.

When I do a backup, I get close to 400MB/Min. But as soon as it does a verify, It goes down to 32MB/Min.
I am testing a restore right now and it is restoring at 32GB/Min.

Do these numbers sound right?

Question by:InfoSysNetworks
    LVL 30

    Accepted Solution

    No! The verify should run at about the same speed as the backup. The restore will be slower because of teh RAID 5 array, but I'd expect reasonable performance (sorry - I don't know the Compaq kit so I can't give you a typical figure).

    With a fibre channel LTO-2, I expect to see 1.2GB/minute backup and over 2GB/min verify. Restore is typically 1GB/min.

    If the library is directly connected to a SCSI card (not iSCSI) does it work properly?

    Author Comment

    That I need to find out. I only have the RAID controllers in the server and need to install another SCSI card. The whole iSCSI configuration has been a nightmare! I'll let you know.

    Expert Comment

    Also make sure in device manager that you are using Veritas drivers for the tape drives - they always seem to get better throughput.
    LVL 30

    Expert Comment

    by:Duncan Meyers
    Hmmm... I'd like to know what the resolution is...

    Author Comment

    I have a tech call open right now. So I will advise when I get a resolution.
    LVL 32

    Expert Comment

    by:Luc Franken
    Any update on this yet?


    Author Comment

    Sorry. Forgot to close it. After all this testing. I sent the drive back and they found hw problems. They sent me a new drive and all is ok.

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