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Windows 2003 Server automatically disabled "enable advanced performance" under disk properties.

We have a Windows 2003 Standard x64 server and would like to enable advanced disk performance.  We are able to turn it on, but after a few hours it will be disabled again.  Is there a way to make this stay on and not disable itself?  Thanks
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Michael Worsham
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To enable advanced disk performance for storage devices:
1.      From the Start menu, click All Programs, click Administrative Tools, and then click Computer Management.
2.      In Computer Management, under Storage, click Disk Management.
3.      Right-click the disk for which you want to enable advanced performance and click Properties.
4.      On the Policies tab, check the Enable advanced performance checkbox.

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I know how to get it enabled, but the problem is that it doesn't stay enabled.  It will automatically disable itself after an hour or so of being enabled.
Are there any messages in the Event Log that show when it starts and stops. I know that some 'automatic' services will turn themselves off if the I/O level is not running at a certain point (i.e. disk, CPU, network, server load, etc). Example: Performance Monitor
Yes, in the system log: "The driver disabled the write cache on device \Device\Harddisk0\DR0."  The server is a Dell Poweredge 2900 and the RAID is PERC 5/i.   Also, a correction to my previous statements;  When I enable advanced disk performance, it immediately changes back to being disabled after I click OK.  The event log message is then logged.

Thank you
Yes.  We do have another server acting as a domain controller and it is using write caching and advanced disk performance, so I'm not sure why this one isn't allowing it
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Michael Worsham
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