How Do SAS Devices Communicate?

SAS devices communicate with each other through links. A link is a physical connection between two phys.

As shown in the following figure, SAS devices contain ports (see What is a SAS Port), ports contain phys, and each phy contains one transmitter and one receiver—one transceiver. A phy can belong to one port only.

Wide P or t Wide P or t Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Narro w P or t Ph y Receiv er T r ansmitter Narro w P or t SAS De vice SAS De vice SAS De vice Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Ph y Receiv er T r ansmitter Wide P or t Wide P or t SAS De vice link

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