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Meaning of SCSI-2

 
Matching Terms:  scsi, scsi adaptor, scsi controller, scsi id, scsi initiator, scsi interface, scsi reconnect, scsi target, scsi-1, scsi-3

Computing Dictionary
 
 Definition: 

A version of the scsi command 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 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.

 

 

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