I recently built an Windows Server 2003 cluster lab using a couple of PCs, two Adaptec AHA2940UW controllers and an old SCSI drive. When configuring the SCSI HBAs, it is important to remember to disable SCSI resets.
Note that when shopping for surplus SCSI HBAs, the AHA2940UW is probably the oldest card that you can use. It has a flash-programmable BIOS. You can download the last BIOS version produced for that card from Adaptec’s website. The older 2940 (without the U in the part number) uses pluggable EPROMS.