HDD reading/writing operation

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HDD reading/writing operation
The LED (green) on the LED PCB is lighted up/blinking if reading/writing to each HDD is performed properly.
In the case of failure, the LED (red) on the LED PCB is blinking.
If only one HDD is faulty, the operation is continued by the other HDD.
If both two HDDs are faulty, E602 error is shown on the control panel to stop the operation.
List of operation status (LED)

Status | HDD 1 (Ch A) | HDD 2 (Ch B)
Green LED | Red LED | Green LED | Red LED
At normal operation | OFF | OFF | OFF | OFF
During access with HDD1 | ON | OFF | OFF | OFF
During access with HDD2 | OFF | OFF | ON | OFF
HDD1 is faulty | OFF | ON | OFF | OFF
HDD2 is faulty | OFF | OFF | OFF | ON
During data copy to HDD1 (rebuild) | OFF/ON | blinking | OFF/ON | OFF
During data copy to HDD1 (rebuild) | OFF/ON | OFF | OFF/ON | blinking