211
8 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 PhoenixView 04B-04IP94
Page 1: ...Network Video Recorder User s Manual V 2 0 0 ...
Page 18: ...8 Select privacy mask zone ...
Page 79: ...69 Figure 4 81 Figure 4 82 ...
Page 80: ...70 Figure 4 83 Figure 4 84 ...
Page 86: ...76 Figure 4 89 Figure 4 90 ...
Page 87: ...77 Figure 4 91 Figure 4 92 ...
Page 88: ...78 Figure 4 93 Figure 4 94 ...
Page 90: ...80 Figure 4 96 Figure 4 97 ...
Page 177: ...167 The motion detect interface is shown as in Figure 5 54 Figure 5 54 Figure 5 55 ...
Page 178: ...168 Figure 5 56 Figure 5 57 Figure 5 58 ...
Page 182: ...172 Figure 5 62 Figure 5 63 ...
