User Manual

SCSI Commands Reference Manual, Rev. J 352
www.seagate.com Parameters for direct access devices
5.2.16.2 Power Condition Transitions log page (1Ah)
The Power Condition Transitions log page (see table 331) provides a count of the occurrences of power condition transition
events. A device server that implements the Power Condition Transitions log page shall implement one or more of the defined
parameters.
DS bit, SPF bit, PAGE CODE field, SUBPAGE CODE and PAGE LENGTH field
The DS bit, SPF bit, PAGE CODE field and PAGE LENGTH field are described in 5.2.2.
The format for all log parameters in the Power Condition Transitions log page is shown in table 332. All log parameters in the
Power Condition Transitions log page contain a four-byte binary value.
Table 331 Power Condition Transitions log page
Bit
Byte
7 6 5 4 3 2 1 0
0 DS SPF (0b) PAGE CODE (1Ah)
1 SUBPAGE CODE (00h)
2 (MSB)
PAGE LENGTH (n-3)
3 (LSB)
POWER CONDITION TRANSITIONS LOG PARAMETERS
4
FIRST POWER CONDITION TRANSITIONS LOG PARAMETER (see table 332)
. . . . . .
LAST POWER CONDITION TRANSITIONS LOG PARAMETER (see table 332)
n