On Thursday, December 26, 2019 2:54:25 PM MST Chris Murphy wrote: > On Tue, Dec 24, 2019 at 2:56 PM Cameron Simpson <c...@cskk.id.au> wrote: > > > > > > > Oh yes, one more thing. If you do the RAID1 thing: either make a shiny > > new RAID1 and copy to it, or practice the transition with test drives. > > Do not risk your high value data by trying to "in place RAID1" it. > > > I'm not sure if this is even possible with mdadm or lvm. For sure they > have no way of knowing which mirror is correct. But even if it's > possible, it's a bit complicated because it implies repartitioning in > order to make room for the necessary metadata area. > > Whereas converting a Btrfs volume from single to raid1 uses balance > code, so it isn't any riskier than a full balance.
It is possible with mdadm, and is even easier with lvm as you're just converting to a mirror. With mdadm, you'd create the RAID1 with 'missing' for the first disk, and the disk itself for the 2nd. It's not risky if you do it this way. _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
