On Friday July 9, luke@xxxxxxxxxxxxxx wrote: > I have a system with two 40GB drives, and the first drive (hda) is setup > under an md device with RAID1 driving it. I'm trying to now make the > second disk, hdc, a mirror of the first. When I try to add it using > mdadm the second disk becomes a spare and no synchronization is done. > Is there any way to add the second disk directly as a mirror? Thanks. If you have a very recent 2.6 kernel and very recent mdadm, then you can mdadm --grow /dev/md0 --raid-disks 2 to tell it that there should really be 2 raid disks, and then the spare will start synchronising. Otherwise you will need to recreate the array telling that you really wanted it to have to raid disks (one missing or failed) in the first place. This is assuming that it currently thinks it has one raid-disk. A cat /proc/mdstat or mdadm -D /dev/md0 would help. 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
