On Thu, Nov 12, 2020 at 12:49 PM Ancor Gonzalez Sosa <ancor@suse.de> wrote:
Is it possible to add devices to already existing btrfs filesystems in YaST? Last time i tried it was only possible when creating new btrfs, but not adding a device to an existing btrfs. That would be cool for servers. I managed the task on the command line, but YaST might be a good place :-)
No. It's not possible because that's a process that can involve moving data and other typically slow operations that are not always easy to control, like btrfs balancing.
Adding a device does not involve any data movement at all. Data movement could be used to improve data distribution but it is not necessary or directly related to adding devices. Removing a device does initiate data evacuation; maybe you mean this?