Chapter 4 SCSI Commands
LOG SENSE Command (4Dh)
DLT-S4 Interface Reference Guide
80
Figure 38
shows the format for a SAS log parameter.
Figure 38
SAS
Phy Control
and Discover Log Page —
Parameter Format
Table 50
SAS
Phy Control and
Discover Log Page Subpage —
Field Descriptions
Bit
Byte
7
6
5
4
3
2
1
0
0 — 1
(MSB)
Parameter Code (Relative Target Port Identifier)
(LSB)
2
DU
DS
TSD
ETC
TMC
LBIN
LP
3
Page Length (34h)
4
Reserved
Protocol Identifier (6h)
5
Reserved
6
Reserved
7
Number of Phys
8 — 55
SAS Phy Log Descriptor (see
figure 39
)
Field
Description
Parameter
Code
The parameter code field contains the relative target port identifier (see
SPC-3
) for the
SSP target port that this log parameter describes.
Parameter
Control Byte
Bit
Value
Description
DU
0
Disable Update.
DS
0
Disable Save.
TSD
0
Target Save Disable.
ETC
0
Enable Threshold Comparison.
TMC
any
Threshold Criteria Met.