Is it possible to downgrade my raid 5 to a raid 1?
Current config: Raid 5 with 3 disks and a global spare.
Wanted config: Raid 1 with 2 disks and assign a global spare and use disk 4 for remote replication.
My idea is to copy first all data to my disk 4 which is taken out of the global spare config.
How to realise this?