For over 20 years, the parallel bus interface has been the mainstream storage interconnect for most storage systems. But increasing bandwidth and flexibility demands have exposed inefficiencies in the two main parallel interface technologies SCSI and ATA. The lack of compatibility between parallel ATA and SCSI including different connectors, cables, and software increases costs for inventory management, R&D,training, and product qualification.
This whitepaper by Adaptec describes Serial technology, specifically Serial ATA (SATA) and Serial Attached SCSI (SAS), and how such technology addresses the architectural limitations of its parallel counterparts.
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