Hitachi travelstar hds723020bla642 用户手册
7K200 SATA OEM Specification
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12.5.6
Initial Power Mode at Power On
After power on the device goes to IDLE mode or STANDBY mode depending on the setting of the
Power Up in Standby Feature set
12.6 Advanced Power Management (Adaptive
Battery Life Extender 3) Feature
This feature provides power saving without performance degradation. The Adaptive Battery Life
Extender 3 (ABLE-3) technology intelligently manages transition among power modes within the
Extender 3 (ABLE-3) technology intelligently manages transition among power modes within the
device by monitoring access patterns of the host.
This technology has three idle modes; Performance Idle mode, Active Idle mode, and Low Power Idle
mode.
This feature allows the host to select an advanced power management level. The advanced power
This technology has three idle modes; Performance Idle mode, Active Idle mode, and Low Power Idle
mode.
This feature allows the host to select an advanced power management level. The advanced power
management level is a scale from the lowest power consumption setting of 01h to the maximum
performance level of FEh. Device performance may increase with increasing advanced power
performance level of FEh. Device performance may increase with increasing advanced power
management levels. Device power consumption may increase with increasing advanced power
management levels. The advanced power management levels contain discrete bands, described in the
section of Set Feature command in detail.
This feature set uses the following functions:
section of Set Feature command in detail.
This feature set uses the following functions:
A SET FEATURES subcommand to enable Advanced Power Management
A SET FEATURES subcommand to disable Advanced Power Management
The Advanced Power Management feature is independent of the Standby timer setting. If both
Advanced Power Management level and the Standby timer are set, the device will go to the Standby
state when the timer times out or the device’s Advanced Power Management algorithm indicates
state when the timer times out or the device’s Advanced Power Management algorithm indicates
that it is time to enter the Standby state.
The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management
feature is supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if
The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management
feature is supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if
set.
Word 91, bits 7-0 contain the current Advanced Power Management level if Advanced Power
Management is enabled.
Word 91, bits 7-0 contain the current Advanced Power Management level if Advanced Power
Management is enabled.
12.6.1
Performance Idle mode
This mode is usually entered immediately after Active mode command processing is complete,
instead of conventional idle mode. In Performance Idle mode, all electronic components remain
powered and full frequency servo remains operational. This provides instantaneous response to the
powered and full frequency servo remains operational. This provides instantaneous response to the
next command. The duration of this mode is intelligently managed as described below.
12.6.2
Active Idle mode
In this mode, power consumption is 45-55% less than that of Performance Idle mode. Additional
electronics are powered off, and the head is parked near the mid-diameter of the disk without
servoing. Recovery time to Active mode is about 20ms.
12.6.3
Low Power Idle mode
Power consumption is 60%-65% less than that of Performance Idle mode. The heads are unloaded on
the ramp, however the spindle is still rotated at the full speed. Recovery time to Active mode is about
300ms.