Risks of backing up live mounted filesystems using dump(8)

[Jeffrey Metcalf]

> 
> If you put the filesystem of interest on its own partition, then
> ISTM you can mount -o remount,ro that one file system, and it should
> remain static during the backup. All data will still be available,
> though unmodifiable. Clearly, one would need to do something like
> an lsof to ensure that nobody is using it when the remount takes
> place.
> 
> Mike
>

Thanks Mike.  Could be useful for my needs.  Just curious.  Would such a mount -o remount,ro flush any dirty filesystem buffers like sync, or would it discard them.

Cheers,

-J