hardware A version of the
SCSI command specification.
SCSI-2 shares the original SCSI's
asynchronous and
synchronous modes and adds a "
Fast SCSI" mode (Wide SCSI" (16 bit, Another major enhancement was the definition of command sets for different device classes. SCSI-1 was rather minimalistic in this respect which led to various incompatibilities especially for devices other than hard-disks. SCSI-2 addresses that problem. allowing
scanners, hard disk drives,
CD-ROM drives, tapes and many other devices to be connected.
Normal SCSI-2 equipment (not wide or
differential) can be connected to a SCSI-1 bus and vice versa.
(1995-04-19)