Idle (E3H/97H); Figure 93. Idle Command (E3H/97H) - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

12.7 Idle (E3h/97h)

Command Block Output
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 93. 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 ready to respond to host commands immediately.
Output parameters to the device
Sector Count
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 0 0 1 1
4 3 2 1
IDN 0 ABT T0N
0 0 V 0
Time-out Parameter. If it is zero, the automatic power down sequence is dis-
abled. If it is non-zero, the automatic power down sequence is enabled. The
time-out interval is shown below:
Value
-------
0
1-240
241-251
252
253
254
255
Deskstar 40GV & 75GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6
AMN BSY RDY DF
0 0 V
Time-out
------------------------
Timer disabled
Value * 5 seconds
(Value-240) * 30 minutes
21 minutes
8 hours
21 minutes 10 seconds
21 minutes 15 seconds
122
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
5 4 3 2 1
DSC DRQ COR IDX
0 V – 0 –
0
ERR
V