Check Power Mode (E5H/98H); Figure 86. Check Power Mode Command (E5H/98H) - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

12.1 Check Power Mode (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

Figure 86. Check Power Mode Command (E5h/98h)

The Check Power Mode command reports whether the device is spun up and the media is available for
immediate access.
Input parameters from the device
Sector
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
The power mode code. The command returns FFh in the Sector Count Register
if the spindle motor is at speed and the drive is not in Standby or Sleep mode.
Otherwise, the Sector Count Register will be set to zero.
Deskstar 40GV & 75GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
109
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
4 3 2 1
DSC DRQ COR IDX
– – 0 –
0
ERR
V