Appendix B Calculate Recording Capacity - Speco N64NR24TB User Manual

Calculate Recording Capacity

Appendix B 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%)).
Record Bitrate Used Space
(Kbps)
10240
8192
6144
4096
3072
2048
1024
768
512
384
256
Record
Bitrate
1CH 4CH
(Kbps)
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
(MB/H) (MB/D)
4500 108000
3600 86400
2700 64800
1800 43200
1350 32400
900 21600
450 10800
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
103
NVR User Manual
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