April 1999
Intermediate to advanced
155 pages
2h 24m
English
Content preview from Fibre Channel for Mass Storage
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1.1. Current Mass Storage Architectures
Current architectures (data transfer protocols) have three major problems:
Limited speed
Limited distance between devices
Limited number of devices supported
Figure 1-1. Current Limitations
For example, the small Computer System Interface (SCSI) parallel interface is restricted to:
the bus being no longer than 25 meters
32 SCSI devices per bus
a double cable system
In today’s modern computer system environments, these restrictions are very limiting to design and confining in space, and it gets worse. The two-byte wide SCSI P-cable limits configurations to 16 devices.
The single-ended SCSI protocol is limited ...
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