Re:Raspberry Pi microSD card performance comparison
by zzzcpan on Friday April 06, 2018 @08:40PM
(#16778736)
Right, so, if we use virtual blocks the size of the physical blocks and either parity block or one of the data blocks are destroyed it is still possible to get the data. And with writes if a write fails our layer can just try to write a bit farther and farther until it succeeds.
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Re:Raspberry Pi microSD card performance comparison
by monocasa on Friday April 06, 2018 @09:09PM
(#16778846)
In general you don't have access to the physical block size. And it can change even within a given lot.
Re:Raspberry Pi microSD card performance comparison
by zzzcpan on Friday April 06, 2018 @09:30PM
(#16778921)
Exact block size is not necessary, big safe choice is fine too. But I suspect it's trivial to detect it with benchmarks, as writing even a byte over a block size would require overwriting two physical blocks instead of one, which is much slower.