Fujitsu MAS3735, MAP3367, MAP3147, MAP3735 Reset processing during write, Fatal hardware errors

	1.7 Command Processing Exceptions
Table 1.6 Reset processing during write
Type of command	Halting process of command execution
WRITE	Data blocks which are currently being written are
WRITE EXTENDED	processed normally, including the ECC portion, and
WRITE AND VERIFY	execution of the command is terminated at the point when
SEND DIAGNOSTIC (Write/Read Test)	that processing is completed. Not all the data transferred
WRITE LONG	from the INIT to the IDD will necessarily be written to the
WRITE SAME	disk media.
FORMAT UNIT	At the point when processing of the data block that is
	currently being written (initialized) is completed,
	execution of the command is halted. Since the formatting
	results cannot be guaranteed for the entire disk surface, it
	is necessary for the INIT to reissue the command.
REASSIGN BLOCKS	At the point when processing of alternate blocks which are
	currently being assigned is completed, execution of the
	command is halted. Not all the alternate blocks specified
	for reassignment processing by the INIT will necessarily
	have been processed.
MODE SELECT	If a parameter save operation has already started, that
MODE SELECT EXTENDED	command is executed until it is completed. However,
LOG SENSE (Specifying parameter save)	since the INIT cannot judge whether the parameters have
	been saved or not, it is necessary for the INIT to confirm
	the status by the MODE SENSE command or the LOG
	SENSE command, or reissue the command.
SYNCHRONIZE CACHE	Data blocks which are currently being written are
	processed normally, including the ECC portion and the
	command is halted at the point when that processing is
	completed. Not all the data which is the write object will
	necessarily be written to the disk media.

1.7.7Fatal hardware errors

(1)Self-diagnostic errors

If a hardware fatal error is detected during the initial self-diagnosis, in off-line self diagnosis or in on- line self-diagnosis (SEND DIAGNOSTIC command), rotation of the spindle motor will be halted.

When in this state, the IDD reports the CHECK CONDITION status for all input/output operation requests except the REQUEST SENSE command. The sense data reported at this time indicate HARDWARE ERROR [=4] / Diagnostic failure on component “nn” [=40-nn]. It is necessary for the INIT either to generate a RESET condition or send a TARGET RESET message and attempt to recover from the error state. For recommended procedures for error recovery methods, see the explanation in Section 5.2 “INIT’s Error Recovery Methods (Recommended).” Furthermore, see Section 6.1.1 “Self-diagnostic Function” in “Product Manual.”

(2)Unrecoverable hardware errors

Limited to cases in which a fatal hardware error occurs during execution of a command, and termination processing such as a CHECK CONDITION status report cannot be executed, the IDD may halt rotation of the spindle motor.

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