Is it the very first ADD driver in the config.sys file? IIRC, it should be. Also, I suspect it may be your particular AHA152x implementation that is locked to IRQ9. Others are set at 3 or other IRQs. There are Linux (driver) implementations that allow 9, 10, 11 and 12.
Problem is, I dont see any way to change the IRQ - the driver doesnt seem to have any such documented switch.
One suggestion I've seen that keeps popping up is to try older versions of the driver (the one in eCS is I think 10.148). You may wish to try something really ancient like the one here:
-
http://www.os2bbs.com/download/drivers.htmlOf course, I'd back up the current version first, so you have it in case you need to go back to it.
And finally, ensure you find every other adaptec driver in the config.sys (if there are any) that you aren't using and REM them out.
Best,
Rob