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how to calculate video storage space and choose RAID NVR for Qatar?
Customer Requirement from Qatar:
Please send me the recording solution for 130 cameras with 120 days recording as per Qatar Police standards.
Notes: Qatar Police standards require recording is 720P@15fps, 120 days recording, use RAID5.
Sysvideo Solution:
Total video: 720@15fps: the average bitrate is 1.5-2.0Mbit / second, let's to use 1.8Mbit, so the total video is:
1.8Mbit/s / 8 * 3600s * 24hours * 130pcs camera * 120days / 1024 / 1024 = 289TB
if we use 4TB hardisk,so need HDD= 289TB / 4TB / 0.9 = 80 pcs
solution 1: if we use 8 HDD RAID5 NVR, we need 80pcs HDD / (8-1)= 11.42<12 pcs NVR, every NVR need to support channels= 130 / 12=10.8<16ch, so we can use 12pcs 8 HDD 16channel 720P NVR;
cost: SNK0816RD * 12 =
solution 2: if we use 16 HDD RAID5 NVR, we need 80pcs HDD / (16-1)= 5.3<6 pcs NVR, every NVR need to support channels= 130 / 6=21.6<32ch, so we can use 6pcs 16 HDD 32channel 720P NVR;
cost1 (using 16 HDD NVR): (SN-ISC5000-S + 4*HDMI card)* 6 = * SN-ISC5000-S don't include HDMI output, need to plus HDMI card.
cost2 (using new NVR SNK1632RD): SNK1632RD*6= * NVR SNK1632RD built-in 2x HDMI & 1x VGA (can display different content)
The three options cost are almost same, but if use solution 1, the user can connect more monitor, and it is more rubbst, as I recommend, if the bugget is enough, you can use solution 1.