Dahua Technology DHI-IVSS7008, User Manual

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User's Manual
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Appendix 3 HDD Capacity Calculation
HDD capacity calculation formula:
Total capacity (M) = Channel number× Demand time length (hour) × HDD capacity occupied per
hour (M/hour)
According to the above formula, get recording time calculation formula.
Recording time (hour) =
For example, for single-channel recording, HDD capacity occupied per hour is 200 M/hour. Use 4-
channel device to make 24-hour continuous recording in every day of one month (30 days), the
required HDD space is: 4 channels× 30 days× 24 hours× 200 M/hour = 576 G. Therefore, five 120 G
HDD or four 160 G HDD shall be installed.
According to the above formula, at different stream values, recording file size of 1 channel in 1 hour
is shown as follows (for your reference):
Bit stream Size
(max.)
File Size
Bit Stream Size
(max.)
File Size
≤ 96 K 42 M 128 K 56 M
160 K 70 M 192 K 84 M
224 K 98 M 256 K 112 M
320 K 140 M 384 K 168 M
448 K 196 M 512 K 225 M
640 K 281 M 768 K 337 M
896 K 393 M 1024 K 450 M
1280 K 562 M 1536 K 675 M
1792 K 787 M 2048 K 900 M