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Essential Guide to Computer Data Storage: From Floppy to DVD, The by Andrei Khurshudov

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SSA (Serial Storage Architecture)

SSA is another high-performance interface that provides high throughput (160 MB/sec) and has other useful features. SSA was introduced by IBM in 1991 as an alternative to the parallel SCSI-3 interface. SSA objectives were somewhat similar to those of FC-AL.

For example, SSA supports up to 128 total devices at distances up to 10 km with a fiber optic extender. SSA throughput is also impressive with up to 160 MB/sec maximum. It may sustain data rates as high as 90 MB/sec per adapter in non-RAID mode and 85 MB/sec in RAID mode. And in 8-way clusters, up to 600 MB/sec and 60,000 I/Os per second are possible. Like FC-AL, it maps the SCSI command set, making it possible for existing applications to migrate to Serial ...

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