IBM DTTA-351010 Hard Drive Specifications - Page 165

Standby, E2h/96h

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12.32 Standby (E2h/96h) Command Block Output Registers Register 76543210 Data Feature Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11100010 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V 0 V Figure 120. Standby Command (E2h/96h) The Standby command causes the device to enter the Standby Mode immediately, and set auto power down timeout 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 Drive Sector Count Timeout Parameter. If zero, then the automatic power down sequence is disabled. If non-zero,then the automatic power down sequence is enabled,and the timeout interval is shown blow: Command Descriptions 157

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12.32
Standby
(E2h/96h)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
VVVVVVVV
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11100010
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
Figure 120. Standby Command (E2h/96h)
The Standby command causes the device to enter the Standby Mode immediately, and set auto power down
timeout 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 Drive
Sector Count
Timeout Parameter.
If zero, then the automatic power down sequence is disabled.
If
non-zero,then
the
automatic
power
down
sequence
is
enabled,and
the
timeout
interval is shown blow:
Command Descriptions
157