AndyMc

Now the workaround for 2904 and similar chipset based cards, you need:

"Adaptec AIC-7870 PCI SCSI Controller (Emulated)"

In device manager, select the icon of the scsi adapter ----> properties----> in the driver tab, click on "update driver"

Select "Browse my computer for driver software"
Click "Let me pick from a list of device drivers on my computer"

At "Select your device type from the list", select "Storage
controllers"

"Show compatible hardware" checkbox ---> unchecked
Then select "Adaptec" as manufacturer, and "Adaptec AIC-7870 PCI SCSI
Controller (Emulated)" as model.

This is "at you own risk", and I haven't tried it but it was suggested to me as a possible workaround to get the 2904 (and similar chipset) going. Personally, I had replaced the card and had things working before I got this advice, but for completeness I thought I would post as well.

Andrew