Hitachi HDT725025VLA380 Specifications - Page 255

Standby E2h/96h

Page 255 highlights

12.43 Standby (E2h/96h) Table 152: Standby (E2h/96h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number Cylinder Low V V V V V V V V Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 0 0 0 1 0 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 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 nonzero, the automatic power down sequence is enabled. The time-out interval is shown below. Value 0 1-240 241-251 252 253 254 255 Time-out Timer disabled Value x 5 seconds (Value-240) x 30 minutes 21 minutes 8 hours 21 minutes 10 seconds 21 minutes 15 seconds Deskstar T7K500 Hard Disk Drive Specification 241

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Deskstar T7K500 Hard Disk Drive Specification
241
12.43
Standby (E2h/96h)
Table 152: 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.
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