216
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
Содержание NVR-7508K
Страница 1: ...Network Video Recorder User s Manual V 2 0 0 ...
Страница 8: ...vii 9 Appendix B Compatible Network Camera List 217 ...
Страница 85: ...74 Figure 4 81 Figure 4 82 ...
Страница 86: ...75 Figure 4 83 Figure 4 84 ...
Страница 92: ...81 Figure 4 89 Figure 4 90 ...
Страница 93: ...82 Figure 4 91 Figure 4 92 ...
Страница 94: ...83 Figure 4 93 Figure 4 94 ...
Страница 96: ...85 Figure 4 96 Figure 4 97 ...
Страница 122: ...111 Figure 4 125 In Figure 4 125 click one HDD item the S M A R T interface is shown as in Figure 4 126 Figure 4 126 ...
Страница 183: ...172 The motion detect interface is shown as in Figure 5 54 Figure 5 54 Figure 5 55 ...
Страница 184: ...173 Figure 5 56 Figure 5 57 Figure 5 58 ...
Страница 188: ...177 Figure 5 62 Figure 5 63 ...
