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1.7.7
Fatal Hardware Errors
(1)
Self-diagnostic Errors
If a fatal error is detected in the hardware in 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 in component “nn” [=40-nn]. It
is necessary for the INIT either to generate a RESET condition or send a BUS DEVICE
RESET message and attempt to recover from the error state. For recommended procedures for
error recovery methods, see the explanation in 4.2 “INIT’s Error Recovery Methods
(Recommended).” Furthermore, see 6.1.1 “Self-diagnostic Function” in “OEM Manual
Product Specifications/Installation Procedures.”
(2)
Unrecoverable Hardware Errors
Limited to cases in which a fatal error occurs in the hardware 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.
After this state occurs, 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] / Internal target failure [=44-nn]. If this state is
reported continuously for input/output operation requests, it is necessary for the INIT to
generate a RESET condition or send a BUS DEVICE RESET message and attempt to recover
from the error state. For recommended procedures for error recovery methods by the INIT, see
the explanation in 4.2 “INIT’s Error Recovery Methods (Recommended).”