Fujitsu M2488 manual Load Unload command 1Bh, 7.1LOAD Unload CDB Description

M2488 PRODUCT GUIDE TAPE UNIT SCSI COMMANDS

4-3.7 LOAD UNLOAD command 1Bh

The LOAD UNLOAD command performs either a rewind operation or a rewind and unload opera- tion. Prior to performing either of these operations, any buffered write data and buffered filemarks are written to the tape. Also, prior to unloading a cartridge the Statistical Log Sense data is cleared.

4-3.7.1LOAD UNLOAD CDB Description

LOAD UNLOAD is a six-byte command. The bytes are shown below and described in Table 4-

24.Common fields are described in paragraph 4-3.1 on page 4-4.

BITS

BYTES	7	6	5	4		3		2	1		0
0	0	0	0	1		1		0	1		1
1
		LUN					Reserved					Immed
2					Reserved
3					Reserved
4
			Reserved					Reserved *		Reten			Load
5
			Reserved							Flag			Link

Note: Changeable fields in the CDB are shaded.

*This bit has an ANSI definition other than reserved; however the ANSI definition of the bit is not applicable for this product. The bit is indicated as reserved since it should always be set to 0 for this product.

Table 4-24. LOAD UNLOAD Field Description

BYTE	BIT	VALUE	DESCRIPTION
0	0-7	1Bh	Operation code.
1	0	0	If Immed (Immediate) bit is 0, status is not returned for the LOAD
			UNLOAD command until the load or unload operation has completed or
			has failed.
		1	If Immed is 1, Status is returned for the LOAD UNLOAD command as
			soon as the CDB has been validated and any buffered write data and
			filemarks have been written to tape. The load or unload operation has been
			started but not necessarily completed when status is returned.
4	0	0	If Load is 0, rewind tape and unload tape cartridge.
		1	If Load is 1, rewind tape.
4	1	0 or 1	The Reten (retension) bit can be set to 0 or 1. The tape unit performs no
			extra actions whether or not the bit is set.

April 1997 CG00000-011503 REV. A 4-25