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Server slow after motherboard and hard drive cache

Posted on 2012-03-26
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Last Modified: 2012-04-01
Hi All,

We had a server hardware failure today and had the motherboard and raid controller changed.

Now the server is running rather slow.

I've had a look into perfmon and the Avg. Disk Queue Length is near 100 all the time.

Any idea what else i can check to work out what is causing the issue?

The server is an HP with Windows 2003 R2


Thanks in adv.

D
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Question by:detox1978
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David earned 2000 total points
ID: 37767762
Most likely the RAID controller is reconstructing, or at very least doing a data consistency check to clean up any parity errors or unrecoverable read errors.

This could take hours, or days depending on  a lot of variables.  Hang tight and don't worry about it.  The system is doing what it is supposed to be doing.   If you turn off any unnecessary services and limit disk I/O the computer does to bare minimum, then rebuild will run faster.
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by:detox1978
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Is there a way to check if this is what it's doing, as this is our mail server and is being impacting the email clients.
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by:David
ID: 37767781
(The RAID controller has software that you can run to verify rebuild/reconstruction state.  You need to check it anyway, as you may be in critical mode and be degraded ... but usually there is audible warning and lights to get your attention).

Still, if you ARE rebuilding then you are exposed for data loss if a drive should die now, so if this was my computer I would back up my most critical file(s) if the backups aren';t current.

(But don't just backup unless you absolutely have to, as best practice is to let it rebuild ASAP and the backup process competes with the resources used to rebuild)
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by:David
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Since this is HP, chances are it is a HP RAID controller like a SMARTArray.  The software should already be installed.  If not, go to http://support.hp.com  and find the win2K3 software.

But I personally would just let it do it's thing.  The less you use that computer now the better. You may even have to reboot to add the software if it is not already there, so you certainly don't want to interrupt anything.
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by:detox1978
ID: 37767912
The HP Array Configuration Utility is installed.

Any idea where i can look to see if it is still rebuilding?
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