Power Mode Commands; Standby; Idle; Check Power Mode - Maxtor 87000D8 Installation And Use Manual

Power Mode Commands

Standby Immediate – 94h/E0h
Spin down and do not change time out value. This command will spin the drive down and cause the drive to
enter the STANDBY MODE immediately. If the drive is already spun down, the spin down sequence is not
executed.
Idle Immediate – 95h/E1h
Spin up and do not change time out value. This command will spin up the spin motor if the drive is spun down,
and cause the drive to enter the IDLE MODE immediately. If the drive is already spinning, the spin up sequence
is not executed. The actuator is parked and some circuits are powered off.
Standby – 96h/E2h
Spin down and change time out value. This command will spin the drive down and cause the drive to enter the
STANDBY MODE immediately. If the drive is already spun down, the spin down sequence is not executed. A
non-zero value placed in the sector count register will enable the Automatic Power Down sequence. The timer
will begin counting down when the drive returns to the IDLE MODE. A value of zero placed in the sector count
register will disable the Automatic Power Down sequence.
Idle – 97h/E3h
Spin up and change time out value. This command will spin-up the spin motor if the drive is spun-down.
If the drive is already spinning, the spin up sequence is not executed. A non-zero value placed in the Sector
Count register will enable the Automatic Power Down sequence and their timer will begin counting down
immediately. A value of zero placed in the Sector Count register will disable the Automatic Power Down
sequence. The actuator is parked and some circuits are powered off.
Check Power Mode – 98h/E5h
This command returns a code in the Sector Count register that determines the current Power Mode status of the
drive. If the drive is in, going to, or recovering from the STANDBY MODE the drive sets the Sector Count
register to OOh. If the drive is in the IDLE MODE or ACTIVE MODE, the drive sets the Sector Count register
to FFh.
Set Sleep Mode – 99h/E6h
This command will spin the drive down and cause the drive to enter the SLEEP MODE immediately. If the drive
is already spun down, the spin down sequence is not executed.
Note: The only way to recover from SLEEP MODE is with a software reset or a hardware reset.

Default Power-on Condition

The drive's default power on condition is the ACTIVE MODE.
Upon receiving a Power Mode command, except the SLEEP MODE command, the drive sets BSY and performs
the requested power operation. Once the requested Power Mode change has begun, the drive resets BSY and
generates an interrupt - without waiting for the drive to spin up or spin down. Upon receiving a SLEEP MODE
command the drive is spun down, and when it is stopped, the drive resets BSY and generates an interrupt.
INTERFACE COMMANDS
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