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12.54 Sleep (E6h/99h)
This command causes the device to enter Sleep Mode.
The device is spun down and the interface becomes inactive. If the device is already spun down, the spin down
sequence is not executed.
The only way to recover from Sleep Mode is with software reset or hardware reset
Table 222 Sleep Command (E6h/99h)
Command Input
Field
Description
FEATURE
N/A
COUNT
N/A
LBA
N/A
Bit Description
DEVICE
7 Obsolete
6 N/A
5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 E6h or 99h
Normal Outputs
See Normal Outputs in Section 12.7 Flush Cache (E7h)
Error Outputs
See Error Outputs in Section 12.12 Idle (E3h / 97h)
301
Hard Disk Drive Specification