11.09.2017 21:17, Senén Vidal Blanco пишет: > I am trying to implement a system that stores the data in a unit (A) with > BTRFS format that is untouchable and that future files and folders created or > modified are stored in another physical unit (B) with BTRFS format. > Each year the new files will be moved to store A and start over. > > The idea is that a duplicate of disk A can be made to keep it in a safe place > and that the files stored there can not be modified until the mixture of (A) > and > (B) is made. >
This can probably be achieved using seed device. Mark original device as seed and all changes will go to another writable device, similar to overlay; then remove seed bit from original device, "btrfs device remove writable" device and it should relocate its content back. Rinse and repeat.
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