btrfs: convert metadata from raid5 to raid1

Menion
2020-02-17T13:44:10Z

Hi all

Following another thread, it has been explicitly advised to avoid
using raid5 metadata scheme with raid5 data due to very high chance to
being not able to recover an array in case of full disk loss.

I am running an array of 5x8Tb HDD with raid5 for data and metadata,
with 5.5 kernel and btrfs prog 5.4.1

This array has been created with Ubuntu 18.10 stock kernel (4.14)

What is the correct procedure to convert metadata from raid5 to proper
raid scheme (raid1 or)?

I think it is wise to state this somewhere in the wiki also

Bye