&gt; Nowaday’s fast Class 10 cards achieve their high read and write speeds only by buffering in advance, assuming that the subsequent blocks will be read or written next. That means they inevitably sacrifice random read and write speeds. This effect is in the order of several magnitudes. For instance, a card with sequential read and write speeds of 10 MB&#x2F;s might collapse to just 0.01 MB&#x2F;s for random access.<p>Yow. Yet another example of over-optimization to benchmarks.<p>...Except that, even then, how exactly is appending to a log file repeatedly random access? Bad journaling?