START/STOP Unit 1B | Fujitsu MAN3184, MAN3367, MAN3735 instruction

3.1.10START/STOP UNIT (1B)

Byte	Bit	7	6	5	4		3	2	1	0
		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.

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.

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.

Note:

The setting terminal specifies only the spindle motor starting method at power on time, and 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.

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.

C141-E124-01EN

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MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

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Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications START/STOP Unit 1B

Models: MAN3735 MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES MAN3367 MAN3184

3.1.10START/STOP UNIT (1B)

LUN

MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications