Serial ATA and Serial SCSI Physical Layer Testing
SATA and SAS Industry Overview
Parallel to Serial Migration
f In Desktop, parallel interface would be replaced by SATA
f In Enterprise computing, Ultra SCSI would be replaced by SAS
SATA and SAS Data Rate f SATA
–  1.5 Gbps and 3 Gbps data rate
–Planned for 6Gbps
–Both AC and DC coupling allowedmargin rate
–Spread Spectrum clocking
f SAS
–  1.5 Gbps, 3.0Gbpsdata rates
–Planned for 6 and 12Gbps
–No spread spectrum clocking
–AC coupling only
Applications
f Characterize the physical layer design of SATA and SAS
Technologies
–Jitter measurements
–Parametric measurements
–Protocol testing between Host Bus adapter and Drives (Devices)–Impedance Analysis

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