User's Manual
350
Appendix 4 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):
Appendix Table 4-1 HDD capacity calculation
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
