I had read some time ago that sync doesn't actually flush the buffer cache, it j... | Hacker News

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		vram22 on Nov 24, 2013 \| parent \| context \| favorite \| on: Linux shell tips and tricks I had read some time ago that sync doesn't actually flush the buffer cache, it just schedules it to be written (and that may happen a little later). Could be wrong though, or the information could be outdated in recent Linux versions (I read that about some UNIX version, IIRC).

vram22 on Nov 24, 2013 [–]

Edit: by "a little later", I meant: not necessarily synchronously. So the sync command may return before the buffer cache is actually flushed.

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