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Current Settings (page 04h)
The Current Settings log page provides a mechanism for the device to report the current settings for feature sets,
features, and other device capabilities.
Offset
Type
Content
0..7
QWord
Supported Capabilities page information header.
Bit
Meaning
63
Set to one
62:24
Reserved
23:16
Page Number. Set to 04h.
15:0
Revision number. Set to 0001h
8..15
QWord
Current Settings
Bit
Meaning
63
Set to one
62:17
Reserved
16
DSN ENABLED bit
15
EPC ENABLED bit
14
8-BIT PIO ENABLED bit
13
VOLATILE WRITE CACHE ENABLED bit
12
Reserved for CFA
11
REVERTING TO DEFAULTS ENABLED bit
10
SENSE DATA ENABLED bit
9
Reserved
8
NON-VOLATILE WRITE CACHE bit
7
READ LOOK-AHEAD ENABLED bit
6
SMART ENABLED bit
5
Reserved
4
Reserved
3
PUIS ENABLED bit
2
APM ENABLED bit
1
FREE-FALL ENABLED bit
0
WRV ENABLED bit
16..23
QWord
Feature Settings
Bit
Meaning
63
Contents of the QWord are valid
62:16
Reserved
17:16
POWER SOURCE field
15:8
APM LEVEL field
7:0
WRV MODE field
24..31
QWord
DMA Host Interface Sector Times
Bit
Meaning
63
Contents of the QWord are valid
62:16
Reserved
15:0
DMA SECTOR TIME field
32..39
QWord
PIO Host Interface Sector Times
Bit
Meaning
63
Contents of the QWord are valid
62:16
Reserved
15:0
PIO SECTOR TIME field
Table 177 Current Settings Log Page
215
Western Digital Ultrastar DC HC310 SATA Product Manual