Table of Contents
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SAS Interface ............................................................................ 1-1
1.1 Topologies in SAS Interface .................................................................... 1-2
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.2 Names and identifiers............................................................................... 1-9
1.2.1
1.2.2
1.3 Phy layer................................................................................................. 1-11
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.5.1 Exception handling in the OOB sequence......................................... 1-18
1.3.6
1.3.6.1 Phy reset sequence after devices are attached ................................... 1-22
1.3.6.2 When the speed negotiation sequence is successful.......................... 1-23
1.3.6.3 Exception handling in the speed negotiation sequence ..................... 1-23
1.3.7
1.4 Link layer ............................................................................................... 1-24
1.4.1
1.4.2
1.4.3
1.4.3.1 AIP (Arbitration in progress)............................................................. 1-27
1.4.3.2 ALIGN............................................................................................... 1-27
C141-C009
Contents
SAS Layering ...................................................................................... 1-3
Physical links and phys ....................................................................... 1-4
Ports (narrow ports and wide ports) .................................................... 1-4
SAS devices ......................................................................................... 1-6
Pathways .............................................................................................. 1-7
Connections ......................................................................................... 1-8
SAS addresses...................................................................................... 1-9
Hashed SAS address .......................................................................... 1-10
8b10b coding ..................................................................................... 1-11
Link reset sequence ........................................................................... 1-12
Start conditions of the link reset sequence ........................................ 1-13
Out of band (OOB) signals................................................................ 1-13
SAS OOB sequency........................................................................... 1-16
SAS speed negotiation sequence ....................................................... 1-18
Phy layer dword synchronization (DWS).......................................... 1-23
Primitives........................................................................................... 1-24
Primitive sequences ........................................................................... 1-27
Primitives not specific to type of connections .................................. 1-27
vii
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