Chapter 10. Record Section In-Depth
2. Calculating Storage Required
2. Calculating Storage Required
As you have had an opportunity to review compression, resolution, quality, and speed of video, all these factors are needed to intelligently calculate proper storage amount needed for each DVR unit or best configure each video. Here is a simple mathematical formula for your convenience.
HDD Size Per Day by each Camera = number of frames per second X number of seconds in a day (1Day = 60X60X24) X size of image in bytes (see Table 2 Data size - Image Quality by Resolution on page 92).
With above formula here are some reference figures
Resolution |
| 1 camera @ | 1 camera @ | 1 camera @ |
| 1 camera @ |
| 1 camera @ | ||||
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| Lowest @ | Low @ | Normal@ |
| High@ |
| Highest@ | |||
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| 30fps @ | 30fps @ | 30fps @ |
| 30fps @ |
| 30fps @ | |||
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| 1 hour | 1 hour | 1 hour |
| 1 hour |
| 1 hour | |||
360X240 |
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| 119 MB | 153 MB | 181 MB |
| 243 MB |
| 299 MB | |||
720X240 |
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| 211 MB | 285 MB | 355 MB |
| 433 MB |
| 492 MB | |||
720X480 |
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| 485 MB | 581 MB | 702 MB |
| 939 MB |
| 1176 MB | |||
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| Table 3 30fps by one camera each hour |
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Resolution |
| 4 camera @ | 4 camera @ | 4 camera @ |
| 4 camera @ |
| 4 camera @ | ||||
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| Lowest @ | Low @ | Normal@ |
| High@ |
| Highest@ | |||
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| 30fps @ | 30fps @ | 30fps @ |
| 30fps @ |
| 30fps @ | |||
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| 500 GB HDD | 500 GB HDD | 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD | |||
360X240 |
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| 45 days 3 hrs | 34 days 21 hrs | 29 days 13 hrs |
| 21 days 23 hrs |
| 17 days 20 hrs | |||
720X240 |
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| 25 days 6 hrs | 18 days 17 hrs | 15 days 1 hrs |
| 12 days 8 hrs |
| 10 days 20 hrs | |||
720X480 |
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| 11 days 15 hrs | 9 days 4 hrs | 7 days 14 hrs |
| 5 days 16 hrs |
| 4 days 12 hrs | |||
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| Table 4 4ch DVR 500GB by each resolution |
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Resolution |
| 9 camera @ |
| 9 camera @ |
| 9 camera @ |
| 9 camera @ |
| 9 camera @ | ||
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| Lowest @ |
| Low @ |
| Normal@ |
| High@ |
| Highest@ |
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| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
360X240 | @ 30fps |
| 20 days 1 hrs |
| 15 days 11 hrs |
| 13 days 3 hrs |
| 9 days 18 hrs |
| 7 days 22 hrs | |
720X240 | @ 15 fps |
| 22 days 6 hrs |
| 16 days 15 hrs |
| 13 days 9 hrs |
| 10 days 23 hrs |
| 9 days 15 hrs | |
720X480 | @ 10 fps |
| 15 days 12 hrs |
| 12 days 6 hrs |
| 10 days 3 hrs |
| 7 days 13 hrs |
| 6 days 1 hrs | |
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| Table 5 9ch DVR 500GB by Resolution with max possible frame rate |
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Resolution |
| 16 camera @ |
| 16 camera @ |
| 16 camera @ |
| 16 camera @ |
| 16 camera @ | ||
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| Lowest @ |
| Low @ |
| Normal@ |
| High@ |
| Highest@ |
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| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
| 500 GB HDD |
360X240 | @ 30fps |
| 11 days 6 hrs |
| 8 days 17 hrs |
| 7 days 9 hrs |
| 5 days 11 hrs |
| 4 days 11 hrs | |
720X240 | @ 15 fps |
| 12 days 15 hrs |
| 9 days 8 hrs |
| 7 days 14 hrs |
| 6 days 4 hrs |
| 5 days 10 hrs | |
720X480 | @ 7.5 fps |
| 11 days 15 hrs |
| 9 days 4 hrs |
| 7 days 12 hrs |
| 5 days 16 hrs |
| 4 days 12 hrs | |
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| Table 6 16ch DVR 500GB by Resolution with max possible frame rate |
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These tables represent relative calculation at continuous recording configuration.
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