Reference Guide

Chapter 4 SCSI Commands
REPORT SUPPORTED OPERATION CODES Command (A3h/0Ch)
DLT-S4 Interface Reference Guide 297
All_commands Parameter
Data Format
4
The REPORT SUPPORTED OPERATION CODES all_commands parameter
data format begins with a 4-byte header that contains the length in bytes
of the parameter data, followed by a list of the returned commands. Each
command descriptor contains information about a single supported
command, including operation code and service action, if applicable. The
list of command descriptors contains all commands the drive supports.
Figure 151 All_ commands
Parameter Descriptor Block —
Data Format
Table 164 All_ commands
Parameter Data — Field
Descriptions
Bit
7 6 5 4 3 2 1 0
Byte
0 — 3
(MSB)
Command Data Length (n – 3)
(LSB)
Commands
4 — n
Command Descriptor 0
.
.
.
Command Descriptor n
Field Description
Command Data
Length
The number of bytes in the returned command
descriptor list.
Command
Descriptors
Each command descriptor contains information
about a single supported command, including
operation code and service action, if applicable (see
figure 152
for the command descriptor data
format).