On Thu, 2020-12-31 at 11:17 -0800, Samuel Sieb wrote:
> On 12/31/20 4:03 AM, Patrick O'Callaghan wrote:
> > On Wed, 2020-12-30 at 20:16 -0700, Chris Murphy wrote:
> > > Btrfs in a raid1 configuration is significantly different than either
> > > mdadm raid or single disk Btrfs. It will self-heal, unambiguously,
> > > both metadata and data.
> > 
> > I currently have mdm RAID1 on two external drives that are used only
> > for backup. They are formatted as ext4. What would be the recommended
> > way to convert them to Brfs RAID1?
> 
> Chris can correct me if I'm wrong, but this seems to be the simplest 
> method.  Remove one of the drives from the array.  Format it as btrfs. 
> Copy the files from the raid onto it.  Add the other drive to btrfs 
> configuring it as raid.  I can't give you any specific btrfs commands 
> though.

Sounds reasonable. I'll try that once 2020 is over (you never know :-)

poc
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