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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
5 .
2 . 1.
INQUIRY
Colllll8Ild
==============================================================================
Bitl
Byte
1
7
6
5
4
3
2
1
o
=============================================================================-
o
:
Operation Code (12h)
-----1-----------------------------------------------------------------------
1
: Logical Unit Number:
Reserved
-----1-----------------------------------------------------------------------
2
:
Reserved
-----1-----------------------------------------------------------------------
3
I
Reserved
-----1-----------------------------------------------------------------------
4
I
Allocation Length
-----1-----------------------------------------------------------------------
5
I
Control Byte
==============================================================================
The INQUIRY command requests that information regarding parameters of the
controller and its attached peripheral device be sent to the initiator.
The INQUIRY command will be terminated with a BUSY status when the
controller is performing power-on diagnostics or the reading of the table of
contents is occurring.
The INQUIRY command will be terminated with a CHECK CONDITION status only
then the controller has detected a catastrophic error.
If an INQUIRY command is received from an initiator with a pending unit
attention condition (before the controller reports CHECK
COh~ITION
status),
the controller will perform the INQUIRY command and will not clear the unit
attention condition.
5-5
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