496
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
Summary of Contents for NVR-ELE4ME-WS
Page 33: ...163 Figure 3 3 3 5 4 Compact 1U Series Please refer to Figure 3 4 for connection sample...
Page 51: ...181 Figure 3 24...
Page 63: ...193 Figure 4 14 Figure 4 15 Step 2 Set network camera login password WARNING...
Page 71: ...201 Figure 4 24 Step 2 Click device display edit interface See Figure 4 25...
Page 148: ...278 Figure 4 114 Figure 4 115...
Page 159: ...289 Figure 4 126 Figure 4 127...
Page 161: ...291 Figure 4 129 Click draw button to draw the zone See Figure 4 130...
Page 165: ...295 Figure 4 133 Click Draw button to draw a zone See Figure 4 134 Figure 4 134...
Page 170: ...300 Figure 4 139 Click draw button to draw the zone See Figure 4 140...
Page 183: ...313 Figure 4 151 Figure 4 152...
Page 184: ...314 Figure 4 153 Figure 4 154...
Page 250: ...380 Figure 4 236...
Page 294: ...424 Figure 5 60 Figure 5 61...
Page 295: ...425 Figure 5 62 Figure 5 63...
Page 319: ...449 Figure 5 97 Figure 5 98...
Page 322: ...452 Figure 5 101 Figure 5 102...
