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
Содержание NVR-1001U
Страница 1: ...i NVR xU NVR xUD Network video recorder User s manual...
Страница 32: ...23 3 4 Connection Sample Figure 3 3...
Страница 87: ...147 Figure 4 74 Figure 4 75...
Страница 88: ...148 Figure 4 76 Figure 4 77...
Страница 94: ...154 Figure 4 82 Figure 4 83...
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Страница 96: ...156 Figure 4 86 Figure 4 87...
Страница 98: ...158 Figure 4 89 Figure 4 90...
Страница 101: ...161 Figure 4 92 Figure 4 93 4 11 1 1 Connection The connection setup interface is shown as in Figure 4 94...
Страница 121: ...181 Figure 4 116 In Figure 4 116 click one HDD item the S M A R T interface is shown as in Figure 4 117 Figure 4 117...
Страница 136: ...196 Figure 4 136 Figure 4 137 4 14 3 1 Add Modify Group...
Страница 176: ...236 Figure 5 53 Figure 5 54...
Страница 177: ...238 Figure 5 55 Figure 5 56 Figure 5 57...
Страница 181: ...242 Figure 5 61 Figure 5 62...
