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General Description
1-6 C141-E237
1.3 System Configuration
For the Serial Attached SCSI, the ANSI standard defines Point-to-Point technology. Figure 1.1 and
Figure 1.2 give examples of the SAS system configuration.
Figure 1.1 Example of SAS system configuration (Dual port internal cabled environment)
Figure 1.2 Example of SAS system configuration (Dual port internal backplane environment)
(1) Port addressing
Every device connected with the SAS protocol has a unique address (SAS address). SAS addresses
are in the Name Address Authority (NAA) IEEE Registered format defined by SCSI Primary
Command-3 (SPC-3).
An SAS address consists of 8 bytes as a unique value set for each device.
The INIT can implement an I/O operation on a disk drive by using the corresponding SAS address
stored by the HDDs.