Abstract.............................................................................................................................................. 2

Transition from parallel to serial SCSI protocol ........................................................................................ 2

SAS terminology.................................................................................................................................. 2

SAS technology................................................................................................................................... 3

SAS devices .................................................................................................................................... 3

Initiators ...................................................................................................................................... 4

Expanders ................................................................................................................................... 4

Targets........................................................................................................................................ 4

Differential signaling ........................................................................................................................ 5

SAS protocol evolution ......................................................................................................................... 6

SAS-1 ............................................................................................................................................. 6

SAS-2 ............................................................................................................................................. 6

SAS-2.1 .......................................................................................................................................... 6

Active cables ............................................................................................................................... 6

Storage power management.......................................................................................................... 7

SAS/SATA interoperability ................................................................................................................... 8

Cabling and connectors ....................................................................................................................... 9

Mini SAS 4x cable connectors and receptacles ................................................................................... 9

Mini SAS 8x cable connectors......................................................................................................... 11

SAS topologies.................................................................................................................................. 11

Internal...................................................................................................................................... 11

External..................................................................................................................................... 13

Multi-node clusters ...................................................................................................................... 14

Zoning ............................................................................................................................................. 14

SAS performance .............................................................................................................................. 16

For more information.......................................................................................................................... 18

Call to action .................................................................................................................................... 18

Serial Attached SCSI storage technology

2nd Edition

Compaq BL10e Serial Attached SCSI storage technology, 2nd Edition

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