Table 61 Extended Power Conditions Subcommands; Table 62 Power Condition Ids - Hitachi HDS723020BLA642 Specifications

9.19 Extended Power Conditions (EPC) feature
The Extended Power Conditions feature set provides a host with additional methods to control the power
condition of a device.
Subcommand code 4Ah enables, disables, and configures the use of the Extended Power Conditions feature
set. If the EPC feature is not supported, then the device shall return command aborted
EPC subcommands and describes the power condition IDs

Table 61 Extended Power Conditions Subcommands

EPC Subcommand
0h
1h
2h
3h
4h ... Fh

Table 62 Power Condition IDs

Power Condition ID
00h
01h
02h...80h
81h
82h
83h
84h ... FEh
FFh
9.19.1 Power conditions
dle_b, and Idle_c are power conditions within the PM1:Idle power management state. Standby_y and
I
Standby_z are power conditions within the PM2:Standby power management state. The power conditions shall
be ordered from highest power consumption (i.e., shortest recovery time) to lowest power consumption (i.e.,
longest recovery time) as follows:
Idle_b power > Idle_c power > Standby_y power > Standby_z power
Each of these power conditions has a set of current, saved and default settings. Default settings are not
modifiable. Default and saved settings shall persist across power cycles. The current settings shall not persist
across power cycles.
Description
Restore Power Condition Settings
Go To Power Condition
Set Power Condition Timer
Set Power Condition State
Reserved
Power Condition Name
Standby_z
Standby_y
Idle_a
Idle_b
Idle_c
All
Hitachi hard disk drive specifications
.
Table 62
Description
Standby
Low RPM idle
Reserved
Not support
Active idle
Low power idle
Reserved
Not support
102
. describes the
Table 61