Fujitsu MBA3300RC, MBC2036RC, MBC2073RC, MBA3147RC Status Byte, Good status, Check Condition status

Command Processing

2.2 Status Byte

The format of the status byte and the types of status which the HDD supports are shown in Table 2.6.

The status byte is 1 byte of information in the RESP (response) frame which notifies the INIT from the TARG after a command is completed, and which shows the results of executing the command. Also, when an Input/Output operation request has been received, even if the TARG cannot execute the command, the status byte is reported. However, by forcibly interrupting execution by an abnormal state such as ABORT TASK, ABORT TASK SET, CLEAR TASK SET, LOGICAL UNIT RESET, HARD RESET, or SAS PORT, if the command is cleared, the status byte for that command is not reported.

	Table 2.6 Status
Status code	Status
00h	GOOD Status
02h	CHECK CONDITION Status
04h	CONDITION MET Status (Not supported)
08h	BUSY Status
10h	INTERMEDIATE Status (Not supported)
14h	INTERMEDIATE CONDITION MET Status (Not supported)
18h	RESERVATION CONFLICT Status
22h	COMMAND TERMINATED Status (Not supported)
28h	TASK SET FULL Status

(1) GOOD status

This status indicates that execution of the command ended normally.

(2) CHECK CONDITION status

This status is reported in the case of a)~c) below. The HDD generates sense data when this status is reported and displays the detailed cause. The HDD transfers the generated sense data together with this status report in the same RESP frame. Therefore, it is unnecessary to gather sense data using the REQUEST SENSE command.

a)If the sense key in the sense data shows RECOVERED ERROR [= 1], it shows that the last command, which resulted in the CHECK CONDITION status, ended normally in conjunction with error recovery processing by the HDD.

b)If the sense key in the sense data shows UNIT ATTENTION [= 6], it shows that the HDD is being kept in the Unit Attention state. For details of the Unit Attention state, see item 2.4.

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