User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
SCSI Command Descriptions
120 Quantum DX-Series Software Interface Guide
SCSI Command Descriptions 3
The SCSI commands are presented in alphabetical order. Each command
starts on a new, odd-numbered page. Because information about a
particular command may span multiple pages, the command name is
repeated, in italics, at the top of every page that concerns that command.
Blank pages in the chapter can be used for note-taking.
The SCSI command descriptions that make up the rest of this chapter
contain detailed information about each command supported by the
Quantum DLT7000 system tape drive. Fields common to many of the
SCSI commands are supported as follows:
Explanations for those common fields are not repeated for every
command in which they appear.
Throughout this manual, multiple bytes that contain information about
specific command parameters are portrayed as shown in the example of
Name of Field
How Field is Supported in SCSI
Commands
Logical Unit Number LUN for tape drive is 0
Reserved Reserved bits, fields, bytes, and
code values are set aside for
future standardization and must
be set to 0. If the drive receives a
command that contains non-zero
bits in a reserved field or a
reserved code value, the
command is terminated with a
CHECK CONDITION status and
the sense key is set to ILLEGAL
REQUEST.
RelAdr Relative Address. Unused;
contents should be 0.