316
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
Note
•
This manual is for reference only. Slight difference may be found in the user interface.
•
All the designs and software here are subject to change without prior written notice.
•
All trademarks and registered trademarks are the properties of their respective owners.
•
If there is any uncertainty or controversy, please refer to the final explanation of us.
•
Please visit our website or contact your local service engineer for more information.
Dante Security
www.dantesecurity.net
Summary of Contents for DNA3500 Series
Page 2: ...DNA Network Video Recorder User s Manual V 5 2 0...
Page 123: ...110 Figure 3 98 Figure 3 99 Figure 3 100...
Page 135: ...122 Figure 3 116 Click draw button to draw the zone See Figure 3 117...
Page 139: ...126 Figure 3 120 Click Draw button to draw a zone See Figure 3 121 Figure 3 121...
Page 144: ...131 Figure 3 126 Click draw button to draw the zone See Figure 3 127...
Page 158: ...145 Figure 3 139 Figure 3 140...
Page 159: ...146 Figure 3 141 Figure 3 142...
Page 160: ...147 Figure 3 143 Figure 3 144...
Page 162: ...149 Figure 3 146 Figure 3 147...
Page 187: ...174 Figure 3 173 Figure 3 174...
Page 255: ...242 Figure 4 53 Figure 4 54...
Page 256: ...243 Figure 4 55 Figure 4 56...
Page 279: ...266 Figure 4 90 Figure 4 91...
Page 286: ...273 Figure 4 100 Figure 4 101...
