Interface Capability For Power Modes; Initial Power Mode At Power On; Advanced Power Management (Able-3) Feature; Table 32: Power Conditions - Hitachi HTS541010G9AT00 - Travelstar 100 GB Hard Drive Specifications

In sleep mode, the device's interface is not active. A host shall not attempt to read the status of the device or issue
commands to the device.

10.6.6 Interface capability for power modes

Each power mode affects the physical interface as defined in the following table:

Table 32: Power conditions

Mode BSY
Active x
Idle o
Standby o
Sleep x
Ready (RDY) is not a power condition. A device may post ready at the interface even though the media may not be
accessible.
The interface is inactive in sleep mode, but the access to the interface registers and the validity of INTRQ is
guaranteed for two seconds after the Sleep command is completed. After this period, the contents of interface
registers may be lost. Since the contents of interface registers may be invalid, the host should NOT check the Status
register nor the Alternate Status register prior to issuing a soft reset to wake up a device.

10.6.7 Initial Power Mode at Power On

After power on or hard reset the device goes to IDLE mode or STANDBY mode depending on the option. Refer to
section 4.4.3 "Operating modes" on page 16 for the initial power mode selection.

10.7 Advanced Power Management (ABLE-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 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 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 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:
• 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 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 set. Word 91, bits 7-0 contains the
current Advanced Power Management level if Advanced Power Management is enabled.
RDY Interface active
x Yes
1 Yes
1 Yes
x No
Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
Media
Active
Active
Inactive
Inactive
56