I/O Interfaces
Serial Attached SCSI
SAS Terms
• Device (= Node in FC)
Device
•Port
Port
phy
• PHYsical port
• Delivery Subsystem
Delivery
Subsystem
A SAS Device is the equivalent term for a Node in Fibre Channel. Neither truly
defines the characteristics of the interface; they are just identifiers for the end
point.
A SAS Device connects through a SAS Port, as a Fibre Channel Node
connects through a logical Fibre Channel Port. The SAS Port is also a logical
definition as 2 types exist, Narrow and Wide.
A Narrow port contains a single physical interface which consists of a transmit
pair and a receive pair, operates at 300MB/s Full Duplex and has a cable
length of up to 8 metres.