Can fstrim work on read only mounts?

[Ed Greshko]

On 08/17/14 08:16, Ali Alipoor.R wrote:
> 1- can fstrim work on read only mounted partitions?
> 2- can discard and ro options be mixed in fstab?

I don't have any SSD in my systems.  However, doing a bit of reading on "trim" it seems it addresses a need when files are being created/deleted/modified on a system.  Since that isn't happening on a RO file system it seems to me to make little sense to enable/use "trim".

Also, FWIW, http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/
seems like a knowledgeable article on the subject.  Especially note the advice to not use discard in the fstab.

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