User's Guide

Chapter 2 Media Changer Commands
Request Sense Command (03h)
Quantum SuperLoader 3 Software Interface Guide 124
Table 57 Request Sense Data
Field Description
Valid When set to 1, this field indicates that the information bytes contain
valid information as defined in the ANSI SCSI-2 specification.
Error Code A value of
70h indicates a current error – the report is associated with
the most recently received command.
A value of
71h indicates a deferred error – the report is associated with a
previous command and not as a result of the current command.
No other values are returned in this field.
Filemark This bit indicates that the current command has read a
Filemark. Not
applicable to a media changer device.
EOM
End of Medium. Not applicable to a media changer device.
ILI
Incorrect Length Indicator. Not applicable to a media changer device.
Sense Key Indicates generic information describing an error or exception condition.
Sense keys are defined in table 58
.
Information Bytes Not applicable to a media changer device. This field should always be 0.
Additional Sense
Length
This field specifies the number of additional sense bytes to follow. If the
Allocation Length of the Command Descriptor Block is too small to
transfer all of the
Additional Sense bytes, the Additional Sense Length is
not adjusted to reflect the truncation.
Command Specific
Information Bytes
Command Specific Information Bytes depend on the command executed.
This field is not used.
Additional Sense
Code (ASC)
This field (and the field for
Additional Sense Code Qualifier) provides
additional information about the
Sense Key and cause of a CHECK
CONDITION
status. Additional Sense Codes are discussed in detail later in
this section.
Additional Sense
Code Qualifier
(ASCQ)
This field (and the field for
Additional Sense Code) provides additional
information about the
Sense Key and cause of a CHECK CONDITION
status.
Additional Sense Code Qualifiers are discussed in detail later in
this chapter.
Sub-Assembly
Code
Not used. Returned as 0.