Canon VK-64 - Manual (Page 227)

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Configuration 4: Backup from Multiple Storage Servers
(Backup for Data Protection)
Premise
100 VB-C50i
Recording condition
Frame rate is 1 fps (one frame per second), Camera Server video quality is 50, resolution
is 320x240, and the size for one image data is 15 KB.
Twenty Camera Servers are registered in five Storage Servers to record video.
The Maximum file size/duration option in the Storage Server Configuration window is
set to six hours.
Under this condition, the video file size per Camera Server per day is 310 MB x 4 files.
Therefore, the video data quantity per Camera Server per day is 1.25 GB and 25 GB for
twenty Camera Servers.
Hardware requirement
25 GB per day x 30 days = 750 GB Ten servers is required (for each Hard disk
capacity of 900 GB or more).
In this case, it is ideal to prepare one backup device for each server for backup. If you use
a 400-GB LTO drive, you can save 2-week data on a single cassette of tape. Alternatively,
you can prepare two or three servers dedicated for backup, and use network backup for
central management.