On Thursday January 25, aym-xunil@xxxxxxxxx wrote: > How do I serialise mdadm --add/--re-add calls other than by > writing some shell to poll /proc/mdstat ? Is there a way to make > mdadm synchronous i.e., waiting until the operation completes or > fails instead of starting it in the background and returning. Something has to poll mdstat (or some /sys file). In mdadm-2.6 where is a '-W' option which will wait for resync/recovery to complete. So mdadm /dev/mdX -add /dev/thing mdadm -W /dev/mdX might be what you want. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html