Dahua HCVR82**A-S3 Series, Руководство пользователя

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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
Important
Shut down the device and then unplug the power cable before you open the case to replace the
HDD!
All figures listed below for reference only!
This series DVR has 1 to 8 HDDs (no limitation for capacity). Please use HDD of 7200rpm or higher.