Nicolas Williams wrote: > If any process holds a reference to a file or directory in that > mirror-mounted filesystem, then that filesystem will not be unmounted, > and then the EBUSY won't happen (since no threads can be racing to mount > the thing that's already mounted). So that's your workaround: keep a > reference to every affected mirror mount open so that they don't get > unmounted. (But I've not tested this workaround, or at least not > recently.) >
The real issue here is that the device is not really busy. If you were to try again right away, it would succeed. So another work around is to either force a retry or try to preload the mirror mount.
