choosing_sd_card
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choosing_sd_card [2018/07/11 08:48] – akuzmuk | choosing_sd_card [2018/07/12 14:16] – [SD cards comparison] akuzmuk | ||
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====== How to select a proper SD card ====== | ====== How to select a proper SD card ====== | ||
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+ | WebHMI requires SD to work. On this page we will explain how to select a best card that will suit your needs. | ||
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+ | {{ :: | ||
===== SD cards comparison ===== | ===== SD cards comparison ===== | ||
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{{ :: | {{ :: | ||
+ | On this photo: Industrial-grade card (left) works for years under heavy load and this commercial-grade card (right) died after 2 months of work. Both cards are from the same manufacturer. | ||
===== Benchmark ===== | ===== Benchmark ===== | ||
We tested five different memory cards in order to understand their performance differences applicable to WebHMI. The test consists of writing 60,000 rows into a data table for graphs (5 columns). | We tested five different memory cards in order to understand their performance differences applicable to WebHMI. The test consists of writing 60,000 rows into a data table for graphs (5 columns). | ||
- | The test involved such drives: | + | The test involved such disks: |
* Silicon Power 4GB Class 4 MLC | * Silicon Power 4GB Class 4 MLC | ||
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How to find a faster card? Test all of your candidates! | How to find a faster card? Test all of your candidates! | ||
- | WebHMI has a built in benchmark to test performance of particular card. Go to page **Maintenance-> | + | WebHMI has a built in benchmark to test performance of a particular card. Go to page **Maintenance-> |
Here is example of such test run: | Here is example of such test run: |
choosing_sd_card.txt · Last modified: 2022/01/14 23:47 by 127.0.0.1