241
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-3202K
Page 1: ...i NVR 3202K User manual ...
Page 20: ...9 ...
Page 29: ...18 Figure 3 1 ...
Page 83: ...113 Figure 4 71 Figure 4 72 ...
Page 84: ...114 Figure 4 73 Figure 4 74 ...
Page 90: ...120 Figure 4 79 Figure 4 80 ...
Page 91: ...121 Figure 4 81 Figure 4 82 ...
Page 92: ...122 Figure 4 83 Figure 4 84 ...
Page 94: ...124 Figure 4 86 Figure 4 87 ...
Page 132: ...162 Figure 4 132 Figure 4 133 4 14 3 1 Add Modify Group ...
Page 172: ...202 The motion detect interface is shown as in Figure 5 52 Figure 5 52 Figure 5 53 ...
Page 173: ...203 Figure 5 54 Figure 5 55 Figure 5 56 ...
Page 177: ...207 Figure 5 60 Figure 5 61 ...
