12.1 Check Power Mode (E5h/98h)
Table 77: Check Power Mode command (E5h/98h)
Command Block Output Registers
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
The Check Power Mode command will report whether the device is spun up and the media is available for immedi-
ate access.
Input parameters from the device
Sector Count
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 0 1 0 1
4
3
2
1
IDN
0
ABT T0N AMN
0
0
V
0
This indicates the power mode code. The command returns FFh in the Sector Count Reg-
ister if the spindle motor is at speed and the device is not in Standby or Sleep mode. Other-
wise, the Sector Count Register is set to 0.
Deskstar 7K400 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0
7
6
5
BSY RDY DF DSC DRQ
0
0
V
0
113
7 6 5 4 3 2 1 0
- - - - - - - -
see below
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4
3
2
1
COR IDX
-
-
0
-
0
ERR
V