Add notes about the performance of Sandisk Ultra cards
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@ -79,11 +79,13 @@ not a guarantee of better performance.
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- Generic 4GB Class 4 microSDHC card - the rate of missing frames is about 1%, and is concentrated around the most
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interesting parts of the log!
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- Sandisk Ultra 32GB (unlike the smaller 16GB version, this version has poor write latency)
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##### microSDHC cards known to have good performance
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- Transcend 16GB Class 10 UHS-I microSDHC (typical error rate < 0.1%)
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- Sandisk Extreme 16GB Class 10 UHS-I microSDHC (typical error rate < 0.1%)
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- Sandisk Ultra 16GB (it performs only half as well as the Extreme in theory, but still very good)
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You should format any card you use with the [SD Association's special formatting tool][] , as it will give the OpenLog
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the best chance of writing at high speed. You must format it with either FAT, or with FAT32 (recommended).
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