Recording Time Calculation - Grandstream Networks GVR3552 User Manual

20. No LCD HDMI output
Check the HDMI cable and whether LCD works in HDMI mode.
21. Record lag on PC in multi-cameras mode
Please check the network bandwidth, 100 MB is recommended and pay attention to the
PC performance. E.g.,16 cameras requires Quad Core CPU, discrete graphics, 2G
memory and high, 256M video memory and higher.

RECORDING TIME CALCULATION

Please confirm the HDD has been installed when install GVR3550/GVR3552 the first time.
HDD Capacity formula is:
Total HDD Space (M) = the amount of cameras * required time (Hour) * the HDD space occupied per
hour（M/H）
From the formula above we could conclude the recording time formula:
Recording Time (hour ) = Total HDD Space (M)/the HDD space occupied per hour （ M/H） *the amount
of cameras
GVR3550/GVR3552 is equipped with MPEG4/H.264 compression technique, its dynamic range is quite
large thus the HDD capacity calculation based on assessing the video file size each camera recorded per
hour.
e.g.:
The video one single camera records per hour takes up 200M/H in HDD, use GVR3550 to record
synchronously with 12 cameras.
Record Time (hour) = 2*4*1024*1024/200（M/H）*12=3495.25（Hour）145.6（Day）
COMPATIBLE HDD
Manufacturer
Seagate
Seagate
Seagate
Seagate
Western Digital
Western Digital
Western Digital
Western Digital
Western Digital
Western Digital
Western Digital
GVR3550/GVR3552 User Manual
Model
ST3000VX000
ST500DM002
ST2000VX000
ST1000VX000
WD40EZRX-00SPEB0
WD20EZRX
WD10EURX-73FH1Y0
WD20EURS-73TLHY0
WD5000AVDS
WD5000AAKX
WD5000AVDS-63U7B1
Capacity
3T
500G
2T
1T
4T
2T
1T
2T
500G
500G
500G
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