Re: Can fstrim work on read only mounts?

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On 17/08/14 10:44, Heinz Diehl wrote:
[...]
I've read the other answers you got in this thread. I've been using
SSD drives nearly two years, all of its partitions are mounted with
discard enabled, and didn't encounter any sideeffects. So despite some
folks are advising against using the discard mount option, it depends
on what's important for you and how your system behaves. In short: you
have to try for yourself what fits your needs.

Btw: great that there's proof for at the discard mount option can
result in lower performance. But, as always, this doesn't take into
account if and to what degree this affects real life behaviour, which
also varies between the respective real life situations...




If you can afford to leave enough free un-partitioned space on the SSD, then you don't need discard or fstrim as the un-partitioned space acts as extra over-provisioning. Have a look at this blog post[1] by Kent Smith from LSI (they make the SandForce flash controller on Intel SSD's) and the comments on it, it was very informative (for me at least).

[1]http://blog.lsi.com/gassing-up-your-ssd
--
Ahmad Samir
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