Rezero Unit (01); Start/Stop Unit (1B) - Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications

3.1.9

REZERO UNIT (01)

Bit
Byte
0
1
2
3
4
5
This command moves the read/write heads of the disk drive to the initial position. A data block with the
logical block address of zero exists at the initial position (cylinder 0 / track 0). Initialization of the disk
drive's positioning control system and automatic adjustment are also performed by this command.
3.1.10

START/STOP UNIT (1B)

Bit
Byte
0
1
2
3
4
5
This command controls starting and stopping of the disk drive's spindle motor. Control of the spindle
motor is performed through the "Start" bit in bit 0 of the CDB byte 4.
The spindle motor can be stopped if this command is issued with the "Start" bit as "0." On the other
hand, the spindle motor can be started by specifying "1" in the "Start" bit.
Bit 1 (LoEj (Load/Eject) of byte 4 of the CDB is the exclusive bit which controls devices with
replaceable recording media, and it has no meaning for the IDD. The IDD disregards the value specified
in this bit and controls starting and stopping of the spindle motor in accordance with the "Start" bit only.
C141-C010
7 6 5
LUN
0 0 0
0 0 0
0 0 0
0 0 0
7 6 5
LUN
0 0 0
0 0 0
0 0 0
0 0 0
3.1 Control/Sense Commands
4 3 2
X'01'
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
4 3 2
X'1B'
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
1 0
0 0
0 0
0 0
0 0
0 Link
1 0
0 Immed
0 0
0 0
LoEj Start
0 Link
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