Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
261
18.42
START STOP UNIT (1B)
Table 245 START STOP UNIT (1B)
Byte
Bit
7
6
5
4
3
2
1
0
0
Command Code = 1Bh
1
Reserved = 0
Immed
2
Reserved = 0
3
Reserved = 0
Power Condition Modifier
4
Power Condition Reserved=0 LoEj= 0 Start
5
VU = 0
Reserved = 0
FLAG
LINK
The START STOP UNIT command is used to spin up or stop the spindle motor.
- Immed bit is to specify
- Power Conditions and Power Condition Modifier fields are used to specify that the logical unit be placed into
a power condition or to adjust a timer as defined in Table 239, if this field is set to a value other than 0h, then the
START bit shall be ignored.
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.