Fatal Hardware Errors; Reset Processing During Write - Fujitsu MAA3182FC Series Manual

Type of command
WRITE
WRITE EXTENDED
WRITE AND VERIFY
SEND DIAGNOSTIC (Write/Read Test)
WRITE LONG
WRITE SAME
FORMAT UNIT
REASSIGN BLOCKS
MODE SELECT
MODE SELECT EXTENDED
LOG SENSE (Specifying parameter save)
SYNCHRONIZE CACHE
2.7.7

Fatal hardware errors

(1) Self-diagnostic errors
If a fatal error was detected in the hardware through an initial self-diagnosis, off-line self-
diagnosis or on-line self diagnosis (SEND DIAGNOSTIC Command), turning of the spindle
motor is stopped.
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 shows HARDWARE ERROR [=4]/Diagnostic failure on component "nn" [= 40-nn]. It is
necessary for the INIT to generate a RESET condition or sent a TARGET RESET and attempt
recovery of the error state. The recommended procedure for error recovery is explained in 5.2,
"INIT Error Recovery (Recommended)".
2 - 26
Table 2.4

Reset processing during write

Halting process of command execution
Data blocks which are currently being written are
processed normally, including the ECC portion, and
execution of the command is terminated at the point
when that processing is completed. Not all the data
transferred from the INIT to the IDD will necessarily be
written to the disk media. If the ATN signal is asserted
immediately after data transfer in the DATA OUT phase
(to the first ACK signal) and the ABORT message is
sent, the data are not written to the disk media.
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.
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.
If a parameter save operation has already started, that
command is executed until it is completed. However,
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.
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.
C141-E054-02EN