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BTRFS: Multiple copies of metadata on different physical drives

Server Fault Asked by agatek on October 7, 2020

I have rather big btrfs volume assembled as a single drive using different physical size drives. The data is single, the metadata is raid1. Still all the (meta)data is within a single volume.

I understand that if one of the physical drives within this volume fails I may not be able to access the data on the remaining drives. I also understand that the metadata contains the information on the data distribution within the physical drives.

Is there a way to further improve the data safety by providing extra redundancy for metadata and this time on a separate physical drive that does not belong to this large volume? If yes, how to do this?

Volume0 – data(volume0,single), mdata(volume0,raid1)
Volume1 – mdata(volume0,raid1)

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