Appendix 3: Hard Disk Capability Calculation - gigamedia GGM CCKIT2C Mode D'emploi

Appendix 3: Hard Disk capability calculation

Make sure the hard disk installed to install the DVR for the first time. Pay attention to the IDE hard disk lines connection.
1. Hard disk capability
There is no limit for recording machine. We recommend 120G~250G size to keep better stability.
2. Overall capability option
The hard disk capability formula is:
Overall capability (M) = channel number*time (hour) *capability in an hour (M/hour)
The recording time formula is:
Recording time (hour) =
The DVR introduces the MPEG4/H.264 compression technology. Its dynamic range is very large so the hard disk capability
calculation is based on the estimation values of each channel creating files in an hour.
Example:
The video files in each channel need 200M capability in an hour. For 4 channels and one month (24hours a day) the needed
hard disk capability is: 4channel*30days*24hours*200M/hour=576G. So it will need one 500G hard disks.
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Overall capability (M)
Capability in an hour (M/hour) *channel number
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