On Sunday May 13, evoltech@xxxxxxxxxxx wrote: > > > Hello all, > > I just set up a new raid 5 array of 4 750G disks and am having a strange > experience where /proc/mdstat is showing that one device is missing from the > array. The output from a "--detail" shows that there is some unnamed device > that has been removed from the array and I don't understand why or how to fix > it. Can someone please shed some light? A raid5 is always created with one missing device and one spare. This is because recovery onto a spare is faster than resync of a brand new array. The real problem here is that recovery has not started. If you mdadm -S /dev/md2 mdadm -A /dev/md2 /dev/sd[def] mdadm /dev/md2 -a /dev/sdg it will start recovery. This bug was fixed in mdadm-2.5.2 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
