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2.3 SCSI Bus Technology
2.3.2 Data Transfer OptionsThe SCSI protocol is designed to provide an efficient peer-to-peer I/O bus with up to 8, 16, or 32 devices depending on the data path widths implemented, including one or more hosts. Data may be transferred asynchronously at rates that depend primarily on device implementation and cable length. Synchronous data transfers are supported at rates up to 10 megatransfers per second. Three data path widths are allowed, 8-bit, 16-bit, and 32-bit. The corresponding maximum transfer rates are 10, 20, and 40 megabytes per second.
Data transfers are divided into three speed classes: asynchronous, slow, and fast. A transfer period specifies the minimum time allowed between the leading edges of successive REQ pulses and of successive ACK pulses while using synchronous data transfers.
BI-0316 - Mass Storage Module - 6 DEC 1996 Copyright © 1996 Brand Innovators B.V. [Next] [Previous] [Up] [Top] [Contents] [Back]