SCSI Status Code
This status code indicates that the device has completed the task successfully.
02h Check Condition
When the target returns a Check Condition in response to a command it is indicating that it has entered a contingent allegiance condition. This means that an error occurred when it attempted to execute a SCSI command. The initiator usually then issues a SCSI Request Sense command in order to obtain a Key Code Qualifier (KCQ) from the target.
04h Condition Met
This status code is returned on successful completion of a Pre-fetch Command.
The target returns Busy if it cannot complete a command at that time, for example if it is in the contingent allegiance condition.
10h Intermediate (obsolete)
14h Intermediate - Condition Met (obsolete)
As the name suggests, this status code is simply a combination of 10h Intermediate and 04h Condition Met. This status code is obsolete starting with SAM-4.
18h Reservation Conflict
22h Command Terminated (obsolete)
The target returns this status if the target has to terminate the current I/O process because it received a Terminate I/O Process message. This status code is obsolete starting with SAM-2.
28h Task Set Full
Similar to 08h Busy status, this status code is returned when the logical unit lacks the resources to accept a received task from an I_T nexus. This status code implies that the logical unit already has at least one task from that I_T nexus, where the 08h Busy status code implies that the logical unit currently has no tasks from that I_T nexus.
30h ACA Active
The target returns this status code if an auto-contingent allegiance condition has occurred.
40h Task Aborted
The target returns this status code when a task is aborted by another I_T nexus and the TAS bit in the Control mode page is set to one.