SDLT 220 and SDLT 320 Product Manual
CHAPTER 6: SCSI Description
81-85002-01
March 2004
6-3
6.2
SCSI-2 Commands
ANSI classifies SCSI commands as mandatory, optional, or vendor-specific.
The mandatory and optional SCSI-2 commands implemented for the drives are
summarized in
Table 6-1
.
Table 6-1.
Implemented ANSI SCSI-2 Commands
Command
Code
Class
Description
ERASE
19h
Mandatory
Causes part or all of the tape medium to be
erased, beginning at the current position on the
logical unit.
INQUIRY
12h
Mandatory
Requests that information be sent to the initiator.
LOAD UNLOAD
1Bh
Optional
Causes tape to move from not ready to ready.
Prior to performing the load unload, the target
ensures that all data, filemarks, and/or setmarks
shall have transferred to the tape medium.
LOCATE
2Bh
Optional
Causes the target to position the logical unit to
the specified block address in a specified
partition. When complete, the logical position is
before the specified position.
LOG SELECT
4Ch
Optional
Provides a means for the initiator to manage
statistical information maintained by the drive
about the drive. This standard defines the format
of the log pages but does not define the exact
conditions and events that are logged.
LOG SENSE
4Dh
Optional
Provides a means for the initiator to retrieve
statistical information maintained by the drive
about the drive.
MODE SELECT (6)/(10)
15h/
55h
Optional
Provides a means for the initiator to specify
device parameters.
MODE SENSE (6)/(10)
1Ah/
5Ah
Optional
Provides a means for a drive to report parameters
to the initiator.
PREVENT ALLOW
MEDIUM REMOVAL
1Eh
Optional
Requests that the target enable or disable the
removal of the medium in the logical unit.
Medium cannot be removed if any initiator has
medium removal prevented.
READ
08h
Mandatory
Requests the drive to transfer data to the initiator.
READ BLOCK LIMITS
05h
Mandatory
Requests that the logical unit’s block length
limits capability be returned.
Summary of Contents for DLTtape SDLT 220
Page 1: ......
Page 12: ...Table of Contents SDLT 220 and SDLT 320 Product Manual xii March 2004 81 85002 01 ...
Page 108: ...CHAPTER 6 SCSI Description SDLT 220 and SDLT 320 Product Manual 6 12 March 2004 81 85002 01 ...
Page 148: ...Glossary SDLT 220 and SDLT 320 Product Manual G 12 March 2004 81 85002 01 ...
Page 149: ......