User's Guide

Chapter 2 Media Changer Commands
Report Device Identifier Command (A3h)
Quantum SuperLoader 3 Software Interface Guide 118
The REPORT DEVICE IDENTIFIER parameter list contains a four-byte field
that contains the length in bytes of the parameter list and the logical unit's
identifier.
Figure 70 Report Device
Identifier
Table 55 Report Device
Identifier Parameter Data
Allocation
Length
If the Allocation Length is not sufficient to contain all the
parameter data, the first portion of the data shall be
returned. This shall not be considered an error. The
actual length of the parameter data is available in the
Identifier Length field in the parameter data. If the
remainder of the parameter data is required, the
application client should send a new
REPORT DEVICE
IDENTIFIER
command with an Allocation Length field
large enough to contain all the data.
Bit
Byte76543210
0 - 3
(MSB)
Identifier Length (n – 4)
(LSB)
4 - n
Identifier
Field Description
Identifier
Length
Specifies the length in bytes of the Identifier field. If the
Allocation Length field in the CDB is too small to transfer
all of the identifier, the length is not adjusted to reflect the
truncation. The identifier length is initially equal to zero,
and is changed only by a successful
SET DEVICE
IDENTIFIER
command.
Field Description