Deskstar T7K500 Hard Disk Drive Specification
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12.11 Idle (E3h/97h)
Table 88: Idle command (E3h/97h)
The Idle command causes the device to enter Idle mode immediately and to set the auto power down time-out
parameter (standby timer). And the timer then starts counting down.
When the Idle mode is entered, the device is spun up to operating speed. If the device is already spinning, the spin
up sequence is not executed.
During Idle mode the device is spinning and is ready to respond to host commands immediately.
Output parameters to the device
Sector Count Time-out Parameter. If it is zero, the automatic power down sequence is disabled. If it is
nonzero, the automatic power down sequence is enabled. The time-out interval is shown
below:
When the automatic power down sequence is enabled, the drive will enter Standby
mode automatically if the time-out interval expires with no drive access from the host. The time-out interval will be
reinitialized if there is a drive access before the time-out interval expires
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature - - - - - - - Error see below
Sector Count V V V V V V V V Sector Count - - - - - - - -
Sector Number - - - - - - - - Sector Number - - - - - - - -
Cylinder Low - - - - - - - - Cylinder Low - - - - - - - -
Cylinder High - - - - - - - - Cylinder High - - - - - - - -
Device/Head 1 - 1 D - - - - Device/Head - - - - - - - -
Command 1 1 1 0 0 0 1 1 Status see below
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
00000V0 0 0V0V- 0- V
Value Time-out
0 Timer disabled
1-240 Value x 5
241-251 (Value-240) x 30 minutes
252 21 minutes
253 8 hours
254 21 minutes 10 seconds
255 21 minutes 15 seconds
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