> What you should have done is > > mdctl --create /dev/md0 --level=1 --raid-disks=2 /dev/hda2 missing > > to say that you want 2 disks, but the second one is currently > missing. Ah, thanks. > You can fix this without loosing data. Just stop the array and > re-create it with the correct information. The data on the drive will > not be lost. > > So: > make sure that /dev/md0 is not mounted and not in use. > mdctl --stop /dev/md0 > mdctl --create /dev/md0 --level=1 --raid-disks=2 /dev/hda2 missing > mdctl --add /dev/md0 /dev/hdc2 Doh! /dev/md0 is actually my root partition... So I guess there's no way to change the number of disks with the md device running? Argh... Jordan Russell - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html