267
7 Appendix A HDD Capacity Calculation
Calculate total capacity needed by each device according to video recording (video recording type and
video file storage time).
Step 1: According to Formula (1) to calculate storage capacity
i
q
that is the capacity of each channel
needed for each hour, unit Mbyte.
1024
3600
8
i
i
d
q
(1)
In the formula:
i
d
means the bit rate, unit Kbit/s
Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the storage
capacity
i
m
, which is storage of each channel needed unit Mbyte.
i
m
=
i
q
×
i
h
×
i
D
(2)
In the formula:
i
h
means the recording time for each day (hour)
i
D
means number of days for which the video shall be kept
Step 3: According to Formula (3) to calculate total capacity (accumulation)
T
q
that is needed for all
channels in the device during
scheduled video recording
.
c
i
i
T
m
q
1
(3)
In the formula:
c
means total number of channels in one device
Step 4: According to Formula (4) to calculate total capacity (accumulation)
T
q
that is needed for all
channels in device during
alarm video recording (including motion detection)
.
c
i
i
T
m
q
1
×
a%
(4)
In the formula
：
a%
means alarm occurrence rate
Summary of Contents for NVR11 Series
Page 1: ...Network Video Recorder User s Manual V 1 3 0...
Page 91: ...80 Figure 3 9 3 5 10 NVR78 Series Please refer to Figure 3 10 for connection sample...
Page 92: ...81 Figure 3 10 3 5 11 NVR78 16P Series Please refer to Figure 3 11 for connection sample...
Page 93: ...82 Figure 3 11 3 5 12 NVR78 RH Series Please refer to Figure 3 12 for connection sample...
Page 94: ...83 Figure 3 12 3 5 13 NVR70 Series Please refer to Figure 3 13 for connection sample...
Page 95: ...84 Figure 3 13 3 5 14 NVR70 R Series Please refer to Figure 3 14 for connection sample...
Page 96: ...85 Figure 3 14...
Page 151: ...140 Figure 4 74 Figure 4 75...
Page 152: ...141 Figure 4 76 Figure 4 77...
Page 158: ...147 Figure 4 82 Figure 4 83...
Page 159: ...148 Figure 4 84 Figure 4 85...
Page 160: ...149 Figure 4 86 Figure 4 87...
Page 162: ...151 Figure 4 89 Figure 4 90...
Page 200: ...189 Figure 4 136 Figure 4 137 4 14 3 1 Add Modify Group...
Page 241: ...230 Figure 5 53 Figure 5 54...
Page 242: ...231 Figure 5 55 Figure 5 56 Figure 5 57...
Page 246: ...235 Figure 5 61 Figure 5 62...
