Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
61
17.3
SAS Names and Identifiers
In SAS, device and port names are worldwide unique names within a transport protocol. Port identifiers are the
values by which ports are identified within a domain, and are used as SAS addresses. PHY identifiers are unique
within a device.
Table 27 Names and Identifiers
Object
SAS Implementation
Port Identifier
SAS address
Port Name
Not defined
Device Name
SAS address
PHY Identifier
PHY identifier
Where the SAS address format is defined by ANSI as follows:
Table 28 SAS Address Format
Byte/Bit
7
6
5
4
3
2
1
0
0
NAA (5h)
(MSB)
1
IEEE Company ID
2
3
(LSB)
(MSB)
4
Vendor Specific Identifier
(LSB)
5
6
7
The SAS device name is a unique SAS address worldwide name. This device name is reported through the SCSI
Vital Products Data.
Each of the two SAS ports also has a unique SAS address worldwide name. These port identifiers are reported in the
IDENTIFY address frame and are used as source and destination addresses in the OPEN address frame. They are
also reported through the SCSI Vital Products Data.
Since this drive is one device with two ports it has three SAS addresses. All SAS addresses are in 64-bit IEEE
Registered Name format, as illustrated in Table 29.
Table 29 IEEE Registered Name Format
Bit
63-60 59-36 35-24 23-2 1-0
0101 OUI in Canonical Form Block Assignment S/N Object