Specifications

8.36 START STOP Unit (1Bh)
LINKFLAGReserved = 0VU=05
Start
LoEj
=0
Reserved
=0
Power Conditions = 04
Reserved = 0
2
3
ImmedReserved = 0Reserved = 01
Command Code = 1Bh0
01234567
Bit
Byte
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.
Ultrastar 146Z10 hard disk drive specifications
162