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If the 3rd party reservation option is not supported, setting this bit to 1 causes the target to return the
following error;
• Status key: B'0000I'(CHECKCONDITION)
• Sense key: X~5'(ILLEGAL REQUEST)
This scanner does not support the 3rd party reservation option.
(b) TPID (third party device ID): Byte 1 This scanner ignores TPID.
4.4.3 INQUIRY command
The following table shows the normal sequence of the INQUIRY command when used with this scanner.
Table 4-10 INQUIRY command
Step Bus phase Initiator operation
←←→→
Target operation
1
BUS FREE Verifies bus free
2
ARBITRATION ON Obtains bus-usage right
3
SELECTION Selects target
→
Drives BSY signal
4
MESSAGE OUT Selects logical unit
→
5
COMMAND Specifies INQUIRY (CBD)
→
6
DATA IN
←
Reports inquiry data
7
STATUS
←
Reports GOOD status
8
MESSAGE IN
←
Reports message (Command Complete
Releases BSY signal
9
BUS FREE
4.4.3.1 INQUIRY command: COMMAND phase (initiator → target)
The INQUIRY command checks information regarding a target and logical unit.
The CDB of this command is shown in the following illustration.