321
Appendix A HDD Capacity Calculation
Calculate total capacity needed by each DVR 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 DVR during
scheduled video recording
.
c
i
i
T
m
q
1
(3)
In the formula:
c
means total number of channels in one DVR
Step 4: According to Formula (4) to calculate total capacity (accumulation)
T
q
that is
needed for all channels in DVR during
alarm video recording (including motion
detection)
.
c
i
i
T
m
q
1
×
a%
(4)
In the formula
:
a%
means alarm occurrence rate
You can refer to the following sheet for the file size in one hour per channel. (All the data
listed below are for reference only.)
Bit stream size
(
max
)
File size
Bit stream size
(
max
)
File size
96K
42M
128K
56M
160K
70M
192K
84M
224K
98M
256K
112M
320K
140M
384K
168M
Содержание HDCVI series
Страница 1: ...Dahua HDCVI Standalone DVR User s Manual Dahua HDCVI Standalone DVR User s Manual V1 6 1 ...
Страница 172: ...162 Figure 4 104 Figure 4 105 ...
Страница 173: ...163 Figure 4 106 Figure 4 107 ...
Страница 189: ...179 Figure 4 124 Figure 4 125 ...
Страница 190: ...180 Figure 4 126 Figure 4 127 ...
Страница 191: ...181 Figure 4 128 Figure 4 129 ...
Страница 194: ...184 Figure 4 133 Figure 4 134 ...
Страница 201: ...191 Figure 4 144 Figure 4 145 4 11 4 1 2 2Trigger Snapshot ...
Страница 203: ...193 Figure 4 147 Figure 4 148 4 11 4 1 2 3Priority ...
Страница 220: ...210 Figure 4 169 For digital channel the interface is shown as below See Figure 4 170 Figure 4 170 4 11 5 6 ATM POS ...
Страница 234: ...224 Figure 4 187 ...
Страница 252: ...242 Figure 5 26 5 8 2 Network 5 8 2 1 TCP IP The single Ethernet port interface is shown as in Figure 5 27 Figure 5 27 ...
Страница 269: ...259 Figure 5 55 Figure 5 56 ...
Страница 282: ...272 Figure 5 71 Figure 5 72 ...
Страница 289: ...279 Figure 5 81 Figure 5 82 Figure 5 83 Please refer to the following sheet for detailed information ...
Страница 332: ...322 448K 196M 512K 225M 640K 281M 768K 337M 896K 393M 1024K 450M 1280K 562M 1536K 675M 1792K 787M 2048K 900M ...