Appendix; Hdd Capacity Calculation - Honeywell HSVR-16 User Manual

8 Appendix

HDD Capacity Calculation

Calculate total capacity needed by each DVR according to video recording (video
recording type and video file storage time).
1. According to formula (1), calculate storage capacity
of each channel needed for each hour, unit Mbyte.
= ÷ ×
q d 8 3600
i i
In the formula:
d
i
2. After video time requirement is confirmed, according to Formula (2) to
calculate the storage capacity
needed unit Mbyte.
= × ×
m q h D
i i i i
In the formula:
means the recording time for each day (hour).
h
i
means the number of days for which the video should be kept.
D
i
3. According to formula (3), calculate the total capacity (accumulation)
that is needed for all channels in the DVR during scheduled video
recording.
c
∑
=
q m
T i
=
i 1
In the formula: means total number of channels in one DVR
c
4. According to formula (4), calculate the total capacity (accumulation)
is needed for all channels in DVR during alarm video recording
(including motion detection).
c
∑
=
×a%
q m
T i
=
i 1
In the formula：a% means alarm occurrence rate.
÷
1024
means the bit rate, unit Kbit/s
, which is storage of each channel
m
i
Honeywell
that is the capacity
q
i
(1)
(2)
(3)
(4)
q
T
that
q
T
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