Hitachi HTS541616J9SA00 manual Advanced Power Management Adaptive, Battery Life Extender 3 Feature

Travelstar 5K160 (SATA) Hard Disk Drive Specification

12.5.3Standby/Sleep command completion timing

1.Confirm the completion of writing cached data in the buffer to media

2.Unload heads on the ramp

3.Set DRDY bit and DSC bit in Status Register

4.Activate the spindle break to stop the spindle motor

5.Wait until spindle motor is stopped

6.Perform post process

12.5.4Status

In the active, idle and standby modes, the device shall have RDY bit of the status register set. If BSY bit is not set, device shall be ready to accept any command.

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

12.5.5Interface Capability for Power Modes

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

Mode	BSY	RDY	Interface active	Media
Active	x	x	Yes	Active
Idle	0	1	Yes	Active
Standby	0	1	Yes	Inactive
Sleep	x	x	No	Inactive

Figure 10 Power conditions

Ready(RDY) is not a power condition. A device may post ready at the interface even though the media may not be accessible.

12.5.6Initial Power Mode at Power On

After power on the device goes to IDLE mode or STANDBY mode depending on the option. Refer HTS5416XXJ9SA00 Final Functional Specification (P/N TBD) for the initial power mode selection.

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 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

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