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.
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