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(C) DO (device offline), UO (unit offline): Byte 1
This scanner ignores DO and UO.
(d) Parameter list length: Bytes 3 to 4
This scanner does not support parameter list length.
4.4.5.2 Contents of self-test
The contents of self-test shall be an equivalent of NOP, provided that CHECK CONDITION is reported if err
information is withheld in the unit.
4.4.5.3 Results of self-test
This scanner reports the results of self-test as follows:
(a) Normal
The GOOD status is returned.
• Status: B'00000' (GOOD)
• Sense key: X'O' (NO SENSE).
(b) Abnormal
If error information is being withheld, the following status is returned:
• Status: B'00001' (CHECK CONDITION)
• Sense key: Error information being withheld
4.4.6 TEST UNIT READY command
The following table shows the normal sequence of the TEST UNIT READY command when used with this scanner.
Table 4-15
Step Bus phase Initiator operation
←←→→
Target
operation
1 BUSFREE Verifies bus free
2 ARBITRATION Obtains bus-usage right
3 SELECTION Select target
→
Drives BSY
signal
4 MESSAGE OUT Selects logical unit
→
5 COMMAND Specifies TEST UNIT READY (CDB)
→
6 STATUS Reports GOOD
status
7 MESSAGE IN
←
Reports message
(Command
Complete)
Releases BSY
signal
8 BUS FREE