 There were not many S/PDIF boards made, however, and they are currently extremely rare.Users purchasing SCSI devices for the ASR-10 should take care to verify compatibility; Ensoniq's SCSI implementation, while technically conformant, depends on the device supporting the low-level DISK FORMAT command, whereas many SCSI devices targeted at the IBM-PC market only supported the TRACK format commands, and such SCSI drives will not be usable by the ASR-10.The Syquest EZ-FLYER 230MB drive, for example, does work on the ASR-10, whereas the contemporary and more popular Iomega ZIP 100MB drives (save for some specially-flashed versions available by special request from the company during the 1990s) do not.