Hitachi 7K250 Specifications - Page 141

Idle E3h/97h

Page 141 highlights

12.9 Idle (E3h/97h) Table 69: Idle command (E3h/97h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 0 0 0 1 1 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V 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: 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 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 timeout interval will be reinitialized if there is a drive access before the time-out interval expires Deskstar 7K250 Hard Disk Drive Specification 127

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Deskstar 7K250 Hard Disk Drive Specification
127
12.9
Idle (E3h/97h)
Table 69: 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
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC 0 IDN 0 ABT T0N AMN
BSY RDY DF DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
V
0
V
-
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