Fujitsu manual M2488 Tape Scsi Commands, Tape Unit Scsi Commands M2488 Product Guide

TAPE UNIT SCSI COMMANDS M2488 PRODUCT GUIDE

4-3 M2488 TAPE SCSI COMMANDS

The SCSI commands used with the M2488 are described in Table 4-1. For a more detailed description of each command, refer to the paragraph listed in the PARAGRAPH column. The Command Descrip- tion Block format is shown in paragraph 4-3.1 on page 4-4.

Table 4-1. M2488 SCSI Commands

OP	COMMAND	DESCRIPTION	PARAGRAPH
CODE
00h	TEST UNIT READY	Provides a means to check if the logical unit is ready.	4-3.30 on page 4-138
01h	REWIND	Causes a rewind to BOT.	4-3.26 on page 4-115
03h	REQUEST SENSE	Requests that the target transfer sense data to the initia-	4-3.23 on page 4-103
		tor.
05h	READ BLOCK LIMITS	Requests the target’s block length limits for the logical	4-3.15 on page 4-68
		unit.
08h	READ	Transfers zero or more blocks to the initiator beginning	4-3.14 on page 4-63
		with the next block on the logical unit.
0Ah	WRITE	Transfers zero or more blocks from the initiator to the	4-3.31 on page 4-140
		current position on the logical unit.
0Fh	READ REVERSE	Requests that the tape unit transfer zero or more blocks	4-3.18 on page 4-80
	(optional)	of data to the initiator.
10h	WRITE FILEMARKS	Requests the write of zero or more filemarks to tape.	4-3.33 on page 4-150
11h	SPACE	Changes the logical unit position relative to the current	4-3.29 on page 4-135
		position.
		Provides a means for an initiator to request information	4-3.6 on page 4-18 &
12h	INQUIRY	regarding parameters of the target and any attached
			5-3 on page 5-17
		peripheral devices.
		Requests that the tape unit transfer zero or more blocks
	RECOVER BUFFERED	of data from the tape unit’s buffer to the initiator. The
14h		command is used to retrieve data contained in the	4-3.21 on page 4-98
	DATA (optional)
		buffer that had been sent earlier by the initiator to be
		written to the medium [tape].
		Provides a means for the initiator to specify medium,
15h	MODE SELECT	logical unit, and peripheral device parameters to the tar-	4-3.12 on page 4-51
		get by sending data relevant to such parameters in a	& 5-2 on page 5-1
		data phase during the command.
16h	RESERVE UNIT	Reserves the specified logical unit for the exclusive use	4-3.25 on page 4-112
		of the requesting initiator.
17h	RELEASE UNIT	Release previously reserved logical units for the	4-3.22 on page 4-101
		requesting initiator.
19h	ERASE	Causes part or all of the remaining medium to be erased	4-3.5 on page 4-15
		beginning from the current logical position.
		Provides a means for the target to report medium, logi-
1Ah	MODE SENSE	cal unit, and peripheral device parameters to the initia-	4-3.13 on page 4-56
		tor by sending data relevant to such parameters in a data	& 5-2 on page 5-1
		phase during the command.

4-2 CG00000-011503 REV. A April 1997