defrag / error checking application

I am urgently searching for an enterprise defrag / error checking application for windows 2000 / 20003 servers.

This software should run as a windows service and have great capabilities i.e able to defrag page file online etc....

All tasks should be performed on line with no down time to our servers.  

This should have good management futures.

Please suggest some companies I can investigate
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Hi kellyexch,
Have you looked at DiskKeeper?

Lieven EmbrechtsSenior IT ConsultantCommented:
I think that the 3 best tools today are: Diskeeper, O&O defrag, PerfectDisk. All 3 are very good.

In my experience:
Diskeeper is quite good at defragging the mft (master file tables), directories and page file. (in a reboot).
Diskeeper is not so good in defragmenting very fragmented volumes (many runs required).
O&O Defrag has a defrag option by Name, which makes older pc's and laptops boot (have slower disk access) faster.
I usually use the combination of Diskeeper & O&O defrag.
PerfectDisk is good in defragmenting very fragmented volumes.
It's not so informative about the details of each volume, Diskeeper's interface is much better.

About defragging the page file on-line:
that's impossible since it's an open system file. Here's how to set it up:
Set the page file to a fixed length of 2 * the physical memory (minimum size = maximum size).
Then defrag it once in a reboot. Now it will never fragment again since it's fixed.
You will notice a considerable speed increase with this setup, especially with databases and busy servers.
If you can, set the page file on a different volume than the system or data-volume.

Hope this helps.

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