Appendix Bhdd Capacity Calculation - HIKVISION DS-8004HCI-S User Manual

Appendix B 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
needed for every hour, unit Mbyte.
Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the
m
storage capacity , which is storage of each channel needed unit Mbyte.
i
Step 3: According to Formula (3) to calculate total capacity (accumulation)
needed for all channels in the DVR during scheduled video recording.
Step 4: According to Formula (4) to calculate total capacity (accumulation)
for all channels in DVR during alarm video recording (including motion detection).
= ÷ ×
q d 8 3600
i i
d
In the formula: means the bit rate, unit Kbit/s
i
m q h D
= × ×
i i i
In the formula:
h
means the recording time for each day (hour)
i
D
means number of days for which the video shall be kept
i
c
∑
=
q
T
=
i 1
In the formula: c means total number of channels in one DVR
∑
=
q
T
i
In the formula: a% means alarm occurrence rate
139
q
that is the capacity of each channel
i
÷
1024
i
m
i
c
m ×a%
i
=
1
(1)
(2)
q
that is
T
(3)
q
that is needed
T
(4)