[Discuss] Please help with RAID1 on Ubuntu

[dsr at randomstring.org (Dan Ritter)]

On Thu, Jun 12, 2014 at 01:14:58PM -0400, Bill Horne wrote:
> lrwxrwxrwx 1 root root  11 Jun 12 11:07
> d8bdbfe5-dfa2-437c-97f2-1d87f265bd3f -> ../../md127
> 
> However, when I enter the command "sudo mdadm --detail --scan", I get
> 
> ARRAY /dev/md/telecom-new:md1 metadata=1.2 name=telecom-new:md1
> UUID=c4e39dd8:541c124b:bd60a9b1:339d6e3e
> 
> ... and since the UUID's aren't matching up, I'm in need of some
> reassurance that I'm not about to brick the machine by using this
> RAID1 "ARRAY".

 -s, --scan
              Scan  config  file  or /proc/mdstat for missing
information.

That info is coming from your out-of-date mdadm.conf.

> BTW, I'd be fine with nuking the raid1 array(s) I have now and
> starting over if that's the easier way. How would I do that?

1 mdadm --stop /dev/md127
2 mdadm --remove /dev/md127
3 mdadm --zero-superblock /dev/sdb (or whatever)

-dsr-