Deskstar 7K250 Hard Disk Drive Specification
199
12.43 Standby (E2h/96h)
Table 128: Standby (E2h/96h)
The Standby command causes the device to enter the Standby Mode immediately and to set the auto power down
time-out parameter (standby timer).
When the Standby mode is entered, the drive is spun down but the interface remains active. If the drive is already
spun down, the spin down sequence is not executed.
During the Standby mode the drive will respond to commands but there is a delay while waiting for the spindle to
reach operating speed.
The automatic power down sequence is enabled and the timer starts counting down when the drive returns to Idle
mode
Output parameters to the device
Sector Count
Time-out Parameter. If it is 0, the time-out interval (Standby Timer) is NOT disabled. If it is non-
zero, the automatic power down sequence is enabled. The time-out interval is shown below.
When the automatic power down sequence is enabled, the device will enter the Standby mode
automatically if the time-out interval expires with no device 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 0
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 seconds
241-251
(Value-240) x 30 minutes
252
21 minutes
253
8 hours
254
21 minutes 10 seconds
255
21 minutes 15 seconds
Содержание Deskstar 7K250
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