191
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
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 k-nl308k
Page 1: ...Network Disk Recorder User s Manual Model No K NL304K K NL308K K NL316K Version 1 0 5 ...
Page 32: ...23 The following figure is based on our K NL316K product Figure 3 2 ...
Page 50: ...41 Figure 4 25 ...
Page 67: ...58 Figure 4 52 Figure 4 53 ...
Page 88: ...79 Figure 4 71 Figure 4 72 ...
Page 89: ...80 Figure 4 73 Figure 4 74 ...
Page 94: ...85 Figure 4 78 Figure 4 79 ...
Page 95: ...86 Figure 4 80 Figure 4 81 ...
Page 96: ...87 Figure 4 82 Figure 4 83 ...
Page 99: ...90 Figure 4 86 Figure 4 87 ...
Page 114: ...105 send rate and receive rate at the top panel Figure 4 105 ...
Page 119: ...110 Figure 4 111 Figure 4 112 ...
Page 129: ...120 Figure 4 125 Figure 4 126 ...
Page 164: ...155 Figure 5 38 Figure 5 39 Figure 5 40 ...
Page 172: ...163 Figure 5 51 Figure 5 52 Figure 5 53 Figure 5 54 ...