A verSion of the SCSI command Specification. SCSI-2 ShareS the original SCSI' SaSynchronouS 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)
