169
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
Summary of Contents for MAX5XXD Series
Page 1: ...ICRealtime MAX5XXD Series Standalone DVR User s Manual Version 6 0 0 ...
Page 48: ...38 Figure 4 25 Figure 4 26 Figure 4 27 ...
Page 49: ...39 Figure 4 28 Figure 4 29 Figure 4 30 ...
Page 54: ...44 Figure 4 34 Figure 4 35 Figure 4 36 ...
Page 62: ...52 Figure 4 52 ...
Page 66: ...56 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 ...
Page 74: ...64 Figure 5 16 Figure 5 17 Figure 5 18 5 3 5 3 NTP Setup ...
Page 115: ...105 Figure 6 11 ...
Page 185: ...175 Maxtor DiamondMax 20 STM3250820AS 250G SATA ...
