On-Net Surveillance Systems, Inc.
NetDVR 6.5
Administration
139
In short: When estimating storage capacity required for archiving, consider your organization's needs, then
plan for worst case rather than best case scenarios.
•
Automatic Response if Running Out of Disk Space
With archiving, NetDVR can automatically respond to the threat of running out of disk space. Two scenarios
can occur, depending on whether the camera database drive is different from, or identical to, the archiving
drive:
Different Drives: Automatic Archiving if Database Drive Runs Out of Disk
Space
In case the NetDVR server is running out of disk space, and
o
the archiving drive is
different from
the camera database drive, and
o
archiving has not taken place within the last hour,
archiving will automatically begin in an attempt to free up disk space. This will happen regardless of any
archiving schedules, but will of course only apply for cameras for which archiving has been enabled in the
.
The server is considered to be running out of disk pace if:
o
there is less than 10% disk space left, andthe available disk space goes below 30 GB plus 1.5 GB
per camera
- or -
o
the available disk space goes below 150 MB plus 20 MB per camera (example: with ten cameras,
the server would be running out of disk space if the remaining available disk space went below 350
MB (150 MB plus 20 MB for each of the ten cameras))
The difference ensures that very large disks will not necessarily be considered to be running out of disk
space just because they have less than 10% disk space left.
On the archiving drive, NetDVR automatically checks that the space required for data from a camera to be
archived plus 1 GB of free disk space per camera is available. If not, the archive drive's oldest data from the
camera in question will be deleted until there is sufficient free space for the new data to be archived.
IMPORTANT:
You will lose the archive data being deleted.
Same Drive: Automatic Moving or Deletion of Archives if Running Out of
Disk Space
In case the NetDVR server is running out of disk space, and the archiving drive is
identical to
the camera
database drive, NetDVR will automatically do the following in an attempt to free up disk space:
1. First, NetDVR will attempt to move archives (moving archives is only possible if you use dynamic
archiving, with which you can archive to several different drives; configured through the
). This will happen if:
o
there is less than 15% disk space left, andthe available disk space goes below 40 GB plus
2 GB per camera
- or -
o
the available disk space goes below 225 MB plus 30 MB per camera (example: with ten
cameras, the server would be running out of disk space if the remaining available disk
space went below 525 MB (225 MB plus 30 MB for each of the ten cameras))
