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Description of Modes
The mirroring system of this machine consists of 4 modes. The status flows among the modes below during operation.
The modes in parentheses show the mirroring system statuses.
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 *
In trouble (HDD not installed/ HDD installed not registered/ HDD disconnected while the Mirroring PCB is in operation)
With troubles (HDD not installed/ HDD installed not registered/ HDD disconnected while the Mirroring PCB is in operation)
* Turn OFF/ ON the power in this mode, the mode returns to the previous mode.
Mode Flow at Start-up
Mode Flow during Operation