Power Management Feature - Hitachi HTS541616J9SA00 Specifications

The default CHS translation mode is described in the Identify Device Information. The current CHS
translation mode also is described in the Identify Device Information.
LBA Addressing Mode
12.4.2
Logical sectors on the device shall be linearly mapped with the first LBA addressed sector (sector 0)
being the same sector as the first logical CHS addressed sector ( cylinder 0, head 0, sector 1).
Irrespective of the logical CHS translation mode currently in effect, the LBA address of a given
logical sector does not change. The following is always true:
LBA = ( (cylinder * heads_per_cylinder + heads)
* sectors_per_track ) + sector - 1
where heads_per_cylinder and sectors_per_track are the current translation mode values.
On LBA addressing mode, the LBA value is set to the following register.
Device <--- LBA bits 27-24
LBA High <--- LBA bits 23-16
LBA Mid <--- LBA bits 15- 8
LBA Low <--- LBA bits 7- 0

12.5 Power Management Feature

The power management feature set permits a host to modify the behavior in a manner which
reduces the power required to operate. The power management feature set provides a set of
commands and a timer that enables a device to implement low power consumption modes.
HTS5416XXJ9SA00 implement the following set of functions.
1. A Standby timer
2. Idle command
3. Idle Immediate command
4. Sleep command
5. Standby command
6. Standby Immediate command
Power Mode
12.5.1
Sleep Mode
Standby Mode
Idle Mode
Active Mode
Power Management Commands
12.5.2
The Check Power Mode command allows a host to determine if a device is currently in, going to or
leaving standby mode.
The Idle and Idle Immediate commands move a device to idle mode immediately from the active or
standby modes. The idle command also sets the standby timer count and starts the standby timer.
The sleep command moves a device to sleep mode. The device's interface becomes inactive at the
completion of the sleep command. A reset is required to move a device out of sleep mode. When a
device exits sleep mode it will enter standby mode.
The Standby and Standby Immediate commands move a device to standby mode immediately from
the active or idle modes. The standby command also sets the standby timer count.
Travelstar 5K160 (SATA) Hard Disk Drive Specification
The lowest power consumption when the device is powered on occurs in Sleep Mode.
When in sleep mode, the device requires a reset to be activated.
The device interface is capable of accepting commands, but as the media may not
immediately accessible, there is a delay while waiting for the spindle to reach
operating speed.
Refer to the section of Adaptive Battery Life Extender Feature.
The device is in execution of a command or accessing the disk media with read
look-ahead function or write cache function.
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