Scanner Interface

A.5 Status: STATUS phase (target ® initiator)

Each time a command is terminated, the target moves into the STATUS phase and returns a status byte to the initiator to report the completion of the command.

Status byte

 

 

 

 

 

 

 

 

 

7

6

5

4

3

2

1

0

Byte 0

(Reserved)

 

 

Status byte code

 

 

(Reserved)

 

 

 

 

 

 

 

 

 

The status supported by this scanner are summarized in the following table.

Code

 

Status of unit

 

 

000000

GOOD

 

∙

The command has successfully terminated.

 

 

000001

CHECK CONDITION

 

a)

The command has abnormally terminated.

 

b)

An abnormal condition was detected before a unit is selected.

 

 

∙ The target detected an error before start of command-controlled processing.

 

 

∙ A unit that switched from the NOT READY status to the READY status was

 

 

selected for the first time.

 

 

∙ A unit that received a RESET CONDITION or a BUS DEVICE RESET

 

 

message was selected for the first time.

 

 

00100

BUSY

 

A target or logical unit cannot accept a new command.

 

 

∙ The logical unit is executing processing.

 

 

∙ The target is executing processing on a specified logical unit or other logical

 

 

unit.

 

 

∙ The target intends to report to an other initiator the sense data of a specified

 

 

logical unit.

 

 

∙ The target intends to report to an other initiator the sense data of a logical unit

 

 

that was not specified.

 

 

∙ The target intends to report the status to any initiator.

 

 

01100

RESERVATION CONFLICT

 

 

∙ The specified unit is already reserved by another initiator.

 

 

 

Appendix A-106