User manual

H.264 Network Digital Video Recorder User Manual
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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=
overall capabilityM
Capability in an hourM/hour*channel number
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.
Appendix 4. Technique parameters
Type 4 Channel 8 Channel 16 Channel
System
Main processor Industry level embedded microprocessor
Operation system Embedded LINUX operation system
System resource
synchronous multi-channel recording, synchronous multi-channel sub-code
stream, synchronous multi-channel playback, synchronous network
operation
Interface
Operation interface 16 bit true color graphical menu interface, mouse operation supportive