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Contents
CHAPTER 1 SAS Interface .............................................................................21
1.1 Topologies in SAS Interface....................................................................22
1.1.1 SAS Layering ........................................................................................23
1.1.2 Physical links and phys .........................................................................24
1.1.3 Ports (narrow ports and wide ports) ......................................................24
1.1.4 SAS devices...........................................................................................26
1.1.5 Pathways................................................................................................27
1.1.6 Connections...........................................................................................28
1.2 Names and identifiers...............................................................................29
1.2.1 SAS addresses .......................................................................................29
1.2.2 Hashed SAS address..............................................................................30
1.3 Phy layer ..................................................................................................31
1.3.1 8b10b coding.........................................................................................31
1.3.2 Link reset sequence ...............................................................................32
1.3.3 Start conditions of the link reset sequence ............................................33
1.3.4 Out of band (OOB) signals....................................................................33
1.3.5 SAS OOB sequency ..............................................................................36
1.3.5.1 Exception handling in the OOB sequence.............................................38
1.3.6 SAS speed negotiation sequence...........................................................38
1.3.6.1 Phy reset sequence after devices are attached .......................................42
1.3.6.2 When the speed negotiation sequence is successful..............................43
1.3.6.3 Exception handling in the speed negotiation sequence .........................43
1.3.7 Phy layer dword synchronization (DWS)..............................................43
1.4 Link layer.................................................................................................44
1.4.1 Primitives...............................................................................................44
1.4.2 Primitive sequences...............................................................................47
1.4.3 Primitives not specific to type of connections.......................................47
1.4.3.1 AIP (Arbitration in progress).................................................................47
1.4.3.2 ALIGN...................................................................................................47
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