A version of the SCSICommand speCifiCation. SCSI-2 shares the original SCSI' s asynChronous and synChronous modes and adds a "Fast SCSI" mode (<10MB/s) and "Wide SCSI" (16 bit, <20MB/s or rarely 32 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 drive}s, {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)
