Start Stop Unit (1Bh); Figure 165. Start Stop Unit - IBM IC35L036UWDY10 - Ultrastar 36.7 GB Hard Drive Specifications

8.36 START STOP Unit (1Bh)

Byte
7 6
0
1 Reserved = 0
2
3
4 Power Conditions = 0
5 VU = 0

Figure 165. START STOP Unit

The START STOP UNIT command is used to spin up or stop the spindle motor.
! Immed bit is to specify
0 status is to be returned at the end of the operation
1 GOOD status shall always be returned immediately after command has been received.
The TEST UNIT READY command may be used to determine when the drive becomes
ready after a spin-up.
! Power Conditions is not supported by the drive and must be set to 0.
! LoEj is not supported by the drive and must be set to 0.
! Start bit is to specify:
0 stop the spindle
1 start the spindle
Note: When the drive has become ready (after a power on), the START STOP UNIT command can be
used without any errors regardless of whether the motor is stopped or spinning.
Bit
5 4 3
Command Code = 1Bh
Reserved = 0
Reserved = 0
Reserved
= 0
Reserved = 0
Ultrastar 146Z10 hard disk drive specifications
162
2 1 0
Immed
LoEj
Start
= 0
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