On Fri Jan 10, 2025 at 6:00 PM CET, Daniel Kral wrote: > As the installer allows single-disk RAID0 configurations and BTRFS > allows to create a filesystem with the RAID10 profile with only two > disks since kernel version 5.15 [0], lower the minimum amount of disks > the installer requires for a BTRFS RAID10 setup. > > The motiviation for this is to allow users to create a BTRFS RAID10 > configuration even though they do not have the necessary disks ready at > setup time itself without needing to convert the profile afterwards.
Thinking about it, it does not really makes that much sense to allow users to create degraded RAIDs - that just asks for all sorts of troubles down the road in my book. ZFS does not allow it either (or supports it AFAIK), for a good reason. So IMHO we should not allow it with Btrfs as well. *Especially* since Btrfs allows one to later on add more devices to a filesystem and rebalance it to different profiles, e.g. from a RAID1 to a RAID10 using # btrfs balance start -mconvert=raid10 -dconvert=raid10 <mountpoint> `-d` and `-m` of course depending on whether you'd want data block and/or metadata chunks to be rebalanced. _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
