IC Realtime HDVR-MX0402-1U5MP-AI2-WEB Product Manual - Page 236
Appendix 2 HDD Capacity Calculation
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Appendix 2 HDD Capacity Calculation Calculate total capacity needed by each DVR according to video recording (video recording type and video file storage time). Step 1 According to Formula (1) to calculate storage capacity qi that is the capacity of each channel needed for each hour, unit MB. qi = di ÷ 8 × 3600 ÷1024 Formula (1): In the formula: di means the bit rate, unit Kbit/s Step 2 After video time requirement is confirmed, according to Formula (2) to calculate the storage capacity mi , which is storage of each channel needed unit MB. Formula (2): mi = qi × hi × Di In the formula: means the recording time for each day (hour) ● hi ● Di means number of days for which the video shall be kept Step 3 According to Formula (3) to that is needed for calculate total capacity (accumulation) qT all channels in the DVR during scheduled video recording. ∑ Formula (3): qT = mi i=1 In the formula: c means total number of channels in one DVR qT that is needed for all Step 4 According to Formula (4) to calculate total capacity (accumulation) channels in DVR during alarm video recording (including motion detection). Formula (4):