Speco N8NRN User Manual page 100

Calculate Recording Capacity
The recording capacity is mainly up to the record resolution, record stream and bitrate. Different image quality parameters decide different disk
capacity occupation in equal times. The bigger the record resolution, record stream and record bitrate is, the more disk capacity is taken up in
equal times. The calculation format of recording capacity is shown as below.
Recording Capacity (MB) = Bitrate (Kbps) ÷1024 ÷ 8 × 3600 × Recording hours per day × Record Storage Days × channel numbers
3600 means record for an hour(1TB=1024GB，1GB=1024MB，1MB=1024KB，1Byte=8bit).
The table below shows the recording capacity requirements for record storage in 30 days.
For instance, there is a 32CH NVR recording 24 hours per day and the record stores for 30 days. The NVR adopts dual stream recording. The main
stream is 4096Kbps and the sub stream is 1024Kbps, then the total recording capacity is 49.45TB (39.56TB + 9.89TB).
Considering the format loss of the disk is about 10%, the required disk capacity will be 55TB (49.45TB ÷ (1-10%)).
Appendix B Calculate Recording Capacity
Record Bitrate
(Kbps)
10240
8192
6144
4096
3072
2048
1024
768
512
384
256
Record Bitrate
(Kbps)
1CH 4CH
10240 3.09 12.36
8192 2.48 9.89
6144 1.86 7.42
4096 1.24 4.95
3072 0.93 3.71
2048 0.62 2.48
1024 0.31 1.24
768 0.24 0.93
512 0.16 0.62
384 0.12 0.47
256 0.08 0.31
Used Space Used Space
(MB/H)
4500
3600
2700
1800
1350
900
450
337.5
225
168.75
112.5
Recording Capacity (TB)
8CH 16CH 32CH
24.72 49.44 98.88
19.78 39.56 79.11
14.84 29.67 59.33
9.89 19.78 39.56
7.42 14.84 29.67
4.95 9.89 19.78
2.48 4.95 9.89
1.86 3.71 7.42
1.24 2.48 4.95
0.93 1.86 3.71
0.62 1.24 2.48
94
(MB/D)
108000
86400
64800
43200
32400
21600
10800
8100
5400
4050
2700
64CH
197.76
158.21
118.66
79.11
59.33
39.56
19.78
14.84
9.89
7.42
4.95
NVR User Manual