When I click it it says:

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Warning: Optimizing drives may cause the system to lock up, or other wise crash in some way if you are using some older buggy chipsets. However you can gain SIGNIFICANT speed and performance. Proceed at your own risk.
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Well we have a pretty busy server and can't risk it being down. Does anyone know what this does and how long it takes? Because then I could be available to reboot it if it may crashing during the process.

Thanks.

It will turn on 32bit DMA access. :)

Oh, so if it ****s up the box I can switch back? sweet.

I've turned it on on all of our servers and other servers that I work on and haven't once seen any side effects from using it.

Does it actually do anything useful?

yah it speeds up your hard drive ;)

In what way though?

Originally posted by alapo
In what way though?

Originally posted by Domenico
It will turn on 32bit DMA access. :)