Fujitsu MAS3735, MAP3367, MAP3147, MAP3735, MAS3367 specifications Reserve Extended, Lun

Command Specifications

•INIT #A can issue INQUIRY, REQUEST SENSE, RELEASE and RESERVE commands to TARG #0, but other commands are rejected with a RESERVATION CONFLICT status. A RELEASE or RELEASE EXTENDED command issued by INIT #A releases TARG #0's reserved state. Also, a RESERVE or RESERVE EXTENDED command changes the reserve state of TARG #0.

•Commands issued by INIT #B to TARG #0 are rejected with a RESERVATION CONFLICT status, except the INQUIRY, REQUEST SENSE and RELEASE commands. A RELEASE command is terminated normally, but it has no influence on the TARG #0 reserve right.

3.An example of the third party reserve function is applicable when using the COPY command. For example, TARG/INIT #1 supports the COPY command, uses the COPY command and in the case that a data transfer between TARG #0 and TARG/INIT#1 is executed, if the third party reserve in 2) is executed before INIT #A issues a COPY command to TARG/INIT #1, access to TARG #0 by INIT #B during execution of the COPY command can be prohibited.

3.1.12RESERVE EXTENDED (56)

	Bit	7	6	5			4		3		2	1		0
Byte
0							X‘56’
1			LUN			3rd Pty			0		0	0		0
2		⋅	⋅	⋅		⋅		⋅		⋅	⋅		⋅
3					Third Party Device ID
4		0	0	0			0		0		0	0	0
5		0	0	0			0		0		0	0	0
6		0	0	0			0		0		0	0	0
7		⋅	⋅	⋅		⋅		⋅		⋅	⋅		⋅
8		⋅	⋅	⋅		⋅		⋅		⋅	⋅		⋅
9		0	0	0			0		0		0	0		Link

This command controls exclusive access to a logical unit (IDD) under a multi-initiator environment together with the RELEASE and RELEASE EXTENDED commands.

The IDD is reserved by the INIT that issued this command or for another SCSI device specified in the CDB.

The functions of this command are the same as for the Group 0 RESERVE command (Section 3.1.11), except that it is possible to specify the third party reserve function to SCSI devices with SCSI IDs 15 to 8.

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