Ignore Arnie, he doesn't have a clue.

Why don't you just try it? At worse it fails to boot, and you restore BIOS setting.
If you have a PATA port using IDE driver, then atapi.sys is installed.

"DOS Guy" wrote in message ...
Arno wrote:

It should not make a difference.

I'm thinking that an XP system that was installed with SATA drivers,
with the controller in SATA -mode, will not be able to boot if the
controller is put into IDE-compatibility mode in the bios setup. Reason
being that the system drivers would have incorporated the SATA drivers
(not the IDE drivers) to perform 32-bit drive access, and upon loading
them the system would find no drives attached to the SATA controller or
might not even find the sata controller - because the controller is now
emulating an IDE interface.