User Manual

SCSI Commands Reference Manual, Rev. J 354
www.seagate.com Parameters for direct access devices
5.2.17 Protocol-Specific Port log page (18h/00h)
The Protocol-Specific Port log page for SAS defined in Table 333 is used to return information about phy events concerning the
SAS target device’s phy(s).
A phy is defined as an object in a device that is used to interface to other devices.
DS bit, SPF bit, PAGE CODE field, SUBPAGE CODE and PAGE LENGTH field
The DS bit, SPF bit, PAGE CODE field, SUBPAGE CODE and PAGE LENGTH field are described in 5.2.2.
The protocol-specific port log parameter list contains a protocol-specific port log parameter for each SCSI port in the SAS target
device.
Table 334 defines the format for the Protocol-Specific Port log parameter for SAS. The SAS log parameter is a list parameter (i.e.,
not a data counter) and only has cumulative (i.e., not threshold) values (see SPC-5).
Table 333 Protocol-Specific Port log page for SAS
Bit
Byte
7 6 5 4 3 2 1 0
0 DS SPF (0b) PAGE CODE (18h)
1 SUBPAGE CODE (00h)
2 (MSB)
PAGE LENGTH (n-3)
3 (LSB)
PROTOCOL-SPECIFIC PORT LOG PARAMETER LIST
4
PROTOCOL-SPECIFIC PORT LOG PARAMETER (first) (see table 334)
. . .
. . . . . .
. . .
PROTOCOL-SPECIFIC PORT LOG PARAMETER (last) (see table 334)
n