Versions of small computer systems interface, Computer Engineering

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Q. Versions of small computer systems interface?

SCSI-1 calls for a cable with 8 data wires plus one for parity.
SCSI-2 allows use of multiple cables to support 16- or even 32-bit data transfers in parallel.
SCSI-3 allows use of multiple cables to support 32- or even 64-bit data transfers in parallel.
With fast SCSI it's possible to transfer 40MB of data per second on a single SCSI cable.

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