274
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
q
i
that is the capacity of each channel
needed for each hour, unit Mbyte.
q
i
d
i
8
3600
1024
(1)
In the formula:
d
i
means the bit rate, unit Kbit/s
Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the storage
capacity
m
i
, which is storage of each channel needed unit Mbyte.
m
i
=
q
i
×
h
i
×
D
i
(2)
In the formula:
h
i
means the recording time for each day (hour)
D
i
means number of days for which the video shall be kept
Step 3: According to Formula (3) to calculate total capacity (accumulation)
q
T
channels in the device during
scheduled video recording
.
that is needed for all
c
q
T
m
i
i
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)
q
T
that is needed for all
channels in device during
alarm video recording (including motion detection)
.
c
q
T
m
i
×
a%
(4)
i
1
In the formula
a%
means alarm occurrence rate
Summary of Contents for NVR-1001U
Page 1: ...i NVR xU NVR xUD Network video recorder User s manual...
Page 32: ...23 3 4 Connection Sample Figure 3 3...
Page 87: ...147 Figure 4 74 Figure 4 75...
Page 88: ...148 Figure 4 76 Figure 4 77...
Page 94: ...154 Figure 4 82 Figure 4 83...
Page 95: ...155 Figure 4 84 Figure 4 85...
Page 96: ...156 Figure 4 86 Figure 4 87...
Page 98: ...158 Figure 4 89 Figure 4 90...
Page 136: ...196 Figure 4 136 Figure 4 137 4 14 3 1 Add Modify Group...
Page 176: ...236 Figure 5 53 Figure 5 54...
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Page 181: ...242 Figure 5 61 Figure 5 62...
