User Manual

SCSI Commands Reference Manual, Rev. J 505
www.seagate.com Parameters for direct access devices
PAGE CODE and PAGE LENGTH fields
The PAGE CODE field and PAGE LENGTH field are defined in SPC-5, and shall be set to the value shown in table 476 for the Power Consumption
VPD page.
Each power consumption descriptor (see table 477) describes one maximum power consumption level that the application client may estab-
lish for use by the active power condition (see SPC-5) using the Power Consumption mode page (see 5.3.20) as described in SPC-5.
POWER CONSUMPTION IDENTIFIER field
The POWER CONSUMPTION IDENTIFIER field provides a reference handle to specify which descriptor is selected by the Power Consumption
mode page as described in SPC-5.
POWER CONSUMPTION UNITS field
The POWER CONSUMPTION UNITS field (see table 478) indicates the units used for the POWER CONSUMPTION VALUE field.
POWER CONSUMPTION VALUE field
The POWER CONSUMPTION VALUE field indicates the maximum power consumption associated with the identifier in the POWER CONSUMP-
TION IDENTIFIER field using the units specified by the POWER CONSUMPTION UNITS field.
Table 477 Power consumption descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0 POWER CONSUMPTION IDENTIFIER
1 Reserved POWER CONSUMPTION UNITS
2 (MSB)
POWER CONSUMPTION VALUE
3 (LSB)
Table 478 POWER CONSUMPTION UNITS field
Code Description
000b Gigawatts
001b Megawatts
010b Kilowatts
011b Watts
100b Milliwatts
101b Microwatts
all others Reserved