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Hmm I think you can mirror different sizes just fine but it'll predictably use the smaller size, no? Is btrfs different in that regard? I have only used it when
by gtirloni 4y ago
Hmm I think you can mirror different sizes just fine but it'll predictably use the smaller size, no? Is btrfs different in that regard? I have only used it when it was released many years ago so my memory is rusty.
- gray_-_wolf 4y agoBtrfs' RAID1 works bit differently. It ensures every block (1GB by default I believe) is present on two devices. So, if for example, you have 2x 1TB and 1x 2TB drive, you get 2 TB of usable space. It is arguably not the most useful property in enterprise setting, but helps to stay on budget on home projects, since I can just use random drives laying around without any further requirements on the matching of the sizes.