Canon imageRUNNER ADVANCE 6075 Series, Service Manual

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Technology > Main Controller > Controls > HDD mirroring feature (option)
Technology > Main Controller > Controls > HDD mirroring feature (option)
● HDD reading/writing operation
At reading:
Main controller PCB 2
HDD
1
HDD
2
Mirroring PCB
At writing:
Data is read by HDD1 (master HDD)
only The same data is written to each HDD at
the same timing
Main controller PCB 2
HDD
1
HDD
2
Mirroring PCB
The ACT 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)
---: Light-out A: lighting-up B: blinking
Status
HDD 1 (Ch A) HDD 2 (Ch B)
Green LED Red LED Green LED Red LED
At normal operation --- --- --- ---
During access with HDD1 A --- --- ---
During access with HDD2 --- --- A ---
HDD1 is faulty --- A --- ---
HDD2 is faulty --- --- --- A
During data copy to HDD1 (rebuild) ---/A B ---/A ---
During data copy to HDD1 (rebuild) ---/A --- ---/A B
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T-2-13
● Description of Modes
The mirroring system of this machine consists of 4 modes.
The modes in parentheses show the mirroring system statuses.
The status flows among the modes below during operation.
The table below lists descriptions of modes and operational overview.
Name of Mode Description Master HDD Status Backup HDD Status
Mirror Mode Both HDDs are normally
operated
In normal operation In normal operation
Degrade Mode Any trouble occurred in
the backup HDD suspends
mirroring operation. The
machine can be used under this
condition, however, the backup
HDD should be replaced at the
earliest convenience.
In normal operation With troubles (HDD not
installed/ HDD in trouble)
Rebuild mode The data of the master HDD is
copied (rebuilt) to the backup
HDD. The machine can be
used under this condition.
In normal operation In recovery from the
trouble (Copying data of
Master HDD)
Halt mode Both HDDs are in trouble (see
*1)
In trouble (HDD not
installed/ HDD installed
not registered/ HDD
disconnected while the
mirroring board is in
operation)
With troubles (HDD not
installed/ HDD installed
not registered/ HDD
disconnected while the
mirroring board is in
operation)
*1: Turn OFF/ ON the power in this mode, the mode returns to the previous mode.
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