Fujitsu MBC2073RC Manual Do Utilizador
1.1 Topologies in SAS Interface
C141-C013
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1.1.1 SAS Layering
As shown in Figure 1.2, for SAS, the following six control layers are defined:
•
Physical layer:
Electric properties related to cables, connectors,
and signals
•
Phy (transceiver) layer: 8B/10B code, OOB, and speed negotiation
•
Link layer:
Primitives, address frames, and connection control
•
Port layer:
Wide port control
•
Transport layer:
Frame control
•
Application layer:
SCSI commands, mode pages, and log pages
Physical layer
Phy layer
Link layer
Port layer
Transport layer
Application layer
Figure 1.2 SAS control layers