Fujitsu MAN3184 User Manual
C141-E124-01EN
3 - 41
3.1.10
START/STOP UNIT (1B)
Bit
Byte
Byte
7
6
5
4
3
2
1
0
0
X‘1B’
1
LUN
0
0
0
0
Immed
2
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
4
0
0
0
0
0
0
LoEj
Start
5
0
0
0
0
0
0
Flag
Link
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.
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.
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.
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.
It is possible to select the disk drive's spindle motor starting mode through the setting terminal on
the IDD. If prohibition of motor starting control is set by this command at the setting terminal, the
spindle motor starts automatically when the IDD's power is switched on. It is also possible to
delay the starting time through the specifications in the CHANGE DEFINITION command. When
the setting terminal is being set to perform motor starting control by command, the IDD's spindle
motor will not start even when the power is switched on. In this case, it is necessary for the INIT
to issue a command to start the spindle motor. See the description of the motor starting mode in
Section 5.3.2 of the Product Manual concerning the setting terminal.
the IDD. If prohibition of motor starting control is set by this command at the setting terminal, the
spindle motor starts automatically when the IDD's power is switched on. It is also possible to
delay the starting time through the specifications in the CHANGE DEFINITION command. When
the setting terminal is being set to perform motor starting control by command, the IDD's spindle
motor will not start even when the power is switched on. In this case, it is necessary for the INIT
to issue a command to start the spindle motor. See the description of the motor starting mode in
Section 5.3.2 of the Product Manual concerning the setting terminal.
Note:
The setting terminal specifies only the spindle motor starting method at power on time, and
whichever mode is set, this command is valid.
whichever mode is set, this command is valid.
The INIT can issue this command whenever it is desired and stop or start the spindle motor
regardless of the state of the setting terminal.
regardless of the state of the setting terminal.
Depending on the value specified in the "Immed (immediate)" bit, bit 0 of CDB byte 1, the timing
of completion (status byte report) of this command differs as shown below.
of completion (status byte report) of this command differs as shown below.