Quoting Neil Brown <neilb@xxxxxxx>: > 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. This is unclear to me. Do you mean that is how mdadm implements raid5 creation or do you mean that is how raid5 is designed? I havn't read about this in any raid5 documentation or mdadm documentation. Can you point me in the right direction? > > 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 The recovery of the array has started, thanks! Sincerely, Dennison Williams - 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
