Dahua HCVR8204A-S3, User Manual, Page: 45 / 446

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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
You can refer to the following sheet 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
96K 42M 128K 56M
160K 70M 192K 84M
224K 98M 256K 112M
320K 140M 384K 168M
448K 196M 512K 225M
640K 281M 768K 337M
896K 393M 1024K 450M
1280K 562M 1536K 675M
1792K 787M 2048K 900M
3072Kbps 1350M 4096K 1800M
6144Kbps 2700M 8192Kbps 3600M
Note

All information listed in the above sheet for reference only. We are not reliable for any
damage or loss resulting from it.

For the space marked by the HDD manufacturer, 1K=1000Bytes, while for the
computer OS, 1K=1024Bytes. So, the space recognized by the computer system is
less than the marked space on the HDD. Please pay attention to it.

All HDD space marked by the HDD manufacturer is shown as below: 1T=1000G,
1G=1000M, 1M=1000K, 1K=1000Bytes.

All HDD space marked by the HDD manufacturer shall become the computer OS
space after the corresponding calculation. For example:
1T
（
marked by the HDD manufacturer
）
=1000G/
（
1.024*1.024*1.024
）
=931G
（
OS space
） ，
500G=500G/
（
1.024*1.024*1.024
）
=465G
3.3.2 HDD Installation