I have a disk which used to be boot disk of a degraded RAID 1 (softraid). The second disk is totally gone.
I don't want to use this disk as RAID 1 disk anymore, just to get data from it. I'm asking because when I plugged the disk, bioctl said 'not enough disks'. Do we really have to necessary require two disks when attaching already existing degraded RAID 1 with only one disk available? (I find it generally pretty sad we can't define RAID 1 with only disk. I could imagine constructing RAID 1 with one disk as useful feature, eg. migration from non-mirrored boot disk to RAID 1 boot disks which attaching just new additional disk. At least we used to do this on RHEL.) My current workaround is running a VM under qemu and accessing this disk as raw device. Surprisingly this works fine in comparision with previous attaching with bioctl. kern.version=OpenBSD 6.0-current (GENERIC.MP) #117: Sat Jan 7 09:10:45 MST 2017 j.
