Initiator Detected Error Message: X'05'(I→T); Abort Task Set Message: X'06' (I→T) - Fujitsu MBA3073 SERIES Technical Manual

The TARG continues command processing by itself, and reconnects the INIT when necessary (by
reconnect processing) to continue command execution on the SCSI bus.
This message cannot request the INIT for saving of the current data pointer.
Note:
To start disconnect processing during data transfer, the TARG must send the SAVE DATA
POINTER message for saving of data pointer before sending this message. This is required
even if all bytes of data specified by the command have already been transferred.
2.3.5 INITIATOR DETECTED ERROR message: X'05'(I→T)
The INITIATOR DETECTED ERROR message informs to the TARG that the INIT has detected
an error which allows command retry by the TARG. The error cause may be associated with the
SCSI bus operations or INIT internal operations.
If this message is posted, the current pointer value is unreliable. Section 3.1 explains the details of
recovery processing when the HDD receives this message.
2.3.6 ABORT TASK SET message: X'06' (I→T)
The ABORT TASK SET message requests the TARG to clear the currently executing or queued
I/O operations. When the TARG receives this message, it immediately performs the following
(regardless of the ATN signal status).
If the LUN has been determined prior to this message, the TARG clears all of the currently executing
or queued I/O operations which have been initiated to the specified logical unit by the source INIT of
this message, and enters the BUS FREE phase. All of the hold data and status information, or the
sense data of the logical unit and INIT are cleared. If the I/O operations are cleared by this message,
their status byte and end messages are not sent to the INIT. This message does not affect on the I/O
operations initiated by another INIT.
If the LUN has not been determined prior to this message, the TARG enters the BUS FREE phase
without any operation. This message does not affect on the currently executing or queued I/O
operations.
If this message is issued to the LUN which does not have the information about the currently
executing or queued I/O operations or sense data status, the TARG does not generate an error
condition but enters the BUS FREE phase.
To clear the disconnected I/O operations, the INIT can send the IDENTIFY and the ABORT
TASK SET messages in succession immediately after the TARG selection (in SELECTION
phase).
Note:
The TARGET RESET, CLEAR TASK SET, ABORT TASK SET, and ABORT TASK
messages can clear one or more I/O operations before they terminate normally.
C141-C015 161