According to the Katana set-up thread:
Can anyone recommend a PCIe SCSI card that will work with a Katana please? I will of have the Mac booted into Windows7. However, if there is a solution using Parallels that would be awesome. Or would that require the SCSI card to also have OS X drivers? All the Mac compatible SCSI cards I did find were hideously expensive :banghead:Requirements for the development box are an installed Adaptec SCSI controller (1542, 1742, 2940, 2940U, 2940UW, or 3940). The Adaptec 2940U is the recommended SCSI card to use. You will also need the latest ASPI drivers installed on your computer.
EDIT: Is there any chance a USB - SCSI converter like this one would work?
The only PCI Express SCSI card I can easily find seems to be this one.