SDCard Testing

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This page discusses additional tests for SD Cards. The 'base' tests are described in NAND_Testing.

Sample output

Segment size vs throughput

Size	Sample High perf card	SanDisk C2 4GB uSD "A"	Toshiba C2 4GB uSD "B"	Unusable card
4MiB	8.86M/s	3.14M/s	5.84M/s	15M/s
2MiB	6.3M/s	4.09M/s	3.6M/s	9.47M/s
1MiB	5.02M/s	2.84M/s	2.21M/s	4.47M/s
512KiB	5.16M/s	1.33M/s	1.3M/s	1.61M/s
256KiB	4.69M/s	868K/s	701K/s	849K/s
128KiB	3.78M/s	556K/s	363K/s	441K/s
64KiB	4.62M/s	297K/s	186K/s	226K/s
32KiB	2.71M/s	155K/s	92K/s	115K/s
16KiB	2.38M/s	76K/s	47K/s	57K/s
8KiB	1.24M/s	38K/s	23K/s	23K/s
4KiB	907K/s	19K/s		8K/s

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