> > mdadm --grow /dev/md0 --raid-disks=3 the mdadm --grow supports saving backup file that can be used to re-assemble the array in case of crash during the "critical section". Any idea what is the size of file? or is there any upper limit in the case of array of 5 drives? saeed - 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