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SCSI-2

   Also found in: Acronyms 0.03 sec.
(hardware)SCSI-2 - 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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The Addonics SCSI LVD 160 features a built-in 32-bit RISC SCSI engine with support for SCSI-1, SCSI-2, SCSI-3, Ultra SCSI, Ultra2 SCSI and Ultra160 SCSI.
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SCSI-2 differential devices, also known as HVD (high voltage differential) devices, can be connected through an expander to the high-performance LVD SCSI bus.
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