User Manual

SCSI Commands Reference Manual, Rev. J 355
www.seagate.com Parameters for direct access devices
PARAMETER CODE field
The PARAMETER CODE field is defined in Clause 5.2.2.2 and contains the relative target port identifier (see SPC-5) of the SAS target port that the
log parameter describes.
PARAMETER LENGTH field
The PARAMETER LENGTH field is defined in Clause 5.2.2.2 and shall be set to the value defined in Table 334.
PROTOCOL IDENTIFIER field
The PROTOCOL IDENTIFIER field is defined in Clause 5.3.23 and shall be set to the value defined in Table 334.
GENERATION CODE field
The GENERATION CODE field is defined in the Phy Control and Discover mode page (Clause 5.3.27).
NUMBER OF PHYS field
The NUMBER OF PHYS field contains the number of phys in the SAS target port (not in the entire SAS target device) and indicates the number
of SAS phy log descriptors in the SAS phy log descriptor list.
The SAS phy log descriptor list contains SAS phy log descriptors.
Table 335 defines the SAS phy log descriptor.
Table 334 Protocol-Specific Port log parameter for SAS
Bit
Byte
7 6 5 4 3 2 1 0
0 (MSB)
PARAMETER CODE (relative target port identifier)
1 (LSB)
2 PARAMETER CONTROL BYTE – binary format list log parameter (see 5.2.2.2.2.5)
3 PARAMETER LENGTH (y-3)
4 Reserved PROTOCOL IDENTIFIER (6h)
5 Reserved
6 GENERATION CODE
7 NUMBER OF PHYS
SAS PHY LOG DESCRIPTOR LIST
8
SAS PHY LOG DESCRIPTOR (first) (see table 335). . .
8+m
. . . . . .
y-m
SAS PHY LOG DESCRIPTOR (last) (see table 335). . .
y