HDD Capacity Calculation
271
HDD Capacity Calculation
Calculate total capacity needed by each DVR according to video recording (video recording
type and video file storage time).
According to Formula (1) to calculate storage capacity
i
q
that is the capacity of each
channel needed for each hour, unit MB.
Formula (1):
1024
3600
8
i
i
d
q
In the formula:
i
d
means the bit rate, unit Kbit/s
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 MB.
Formula (2):
=
×
i
h
×
i
D
In the formula:
means the recording time for each day (hour)
means number of days for which the video shall be kept
According to Formula (3) to calculate total capacity (accumulation)
T
q
that is needed
for all channels in the DVR during
scheduled video recording
.
Formula (3):
c
i
i
T
m
q
1
In the formula:
c
means total number of channels in one DVR
According to Formula (4) to calculate total capacity (accumulation)
that is needed
for all channels in DVR during
alarm video recording (including motion detection)
.
Formula (4):
c
i
i
T
m
q
1
×
a%
In the formula
：
a%
means alarm occurrence rate
You can refer to the following table 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
96Kbps
42MB
128Kbps
56MB
160Kbps
70MB
192Kbps
84MB
224Kbps
98MB
256Kbps
112MB
320Kbps
140MB
384Kbps
168MB
448Kbps
196MB
512Kbps
225MB
i
m
i
q
i
h
i
D
T
q
Summary of Contents for Smart 1U
Page 1: ...DIGITAL VIDEO RECORDER User s Manual V1 0 0...
Page 30: ...Connecting Basics 20...
Page 80: ...Local Configurations 70 No Icon Description...
Page 181: ...Local Configurations 171 Select the Enable check boxes to enable IoT function See Figure 5 152...
Page 234: ...Local Configurations 224...
Page 280: ...Glossary 270 Abbreviations Full term VGA Video Graphics Array WAN Wide Area Network...
Page 298: ...Earthing 288...
