
Digital Video Recorder
67
Disk Mirroring
The DVR supports disk mirroring to prevent unexpected loss of recorded video data that might be caused by disk damage
or corruption. You can set up disk mirroring by highlighting Storage in the System menu and pressing the
button.
Figure 53 : System – Storage setup screen.
You can enable mirroring between two disks by designating the source disk and the destination disk from a list of internal
hard disk drives. Up to two Mirrors are supported.
Highlighting the boxes under Source and Dest. and pressing the button allows you to select the source disk and
the destination disk for the selected Mirror.
NOTE: The source disk can be designated only from devices formatted for recording.
A device formatted for archiving cannot be used for disk mirroring.
The manufacturer, model and capacity of the source disk and the destination disk should be same for
the proper mirroring between two disks.
CAUTION: Any existing data on the Destination Disk will be erased once it is designated as a mirror
destination disk.
Highlighting Start and pressing the
button displays a confirmation screen asking you to confirm whether or not you
want to start mirroring the selected disk. Once you start mirroring, the two disks will be resynchronized. Any data on
the destination disk will be erased, and the data on the source disk will be copied to the destination disk. If the source
disk is formatted and has no data, the disks will not be resynchronized. Resynchronization takes about 40 minutes per
each 10GB of capacity. After resynchronization is complete, disk mirroring (writing data on the two disks at the same
time) will start.
NOTE: Resynchronization will pause while searching video.
Once disk mirroring starts, you can cancel it by highlighting Stop and pressing the button. Selecting Stop displays
a confirmation screen asking you to confirm whether or not you want to stop mirroring for the selected disk.
NOTE: Once disk mirroring stopped, the destination disk will be set to Not Used. If resynchronization has been
finished, the destination disk cannot be used for recording or archiving, but it can be used for searching.
If you want to use the disk for recording or archiving, you must reformat it.
CAUTION: Disk mirroring will NOT automatically restart from an interrupted state. Once mirroring
is stopped, you must restart it by following the mirroring setup procedures.
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