User manual

Operation
105
Siemens Building Technologies
Fire Safety & Security Products 12.2008
9.10.9 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.
Fig. 126 Storage Information screen
In the Information 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.
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.
NOTE
A device formatted for archiving cannot be used for disk mirroring.
NOTE
The manufacturer, model and capacity of the source disk and the destination disk should be same for
the proper mirroring between two disks.
NOTE
While disks are mirroring, the DVR will stop archiving video data.
IMPORTANT
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.