On Mon, Feb 17, 2020 at 03:55:02PM -0700, Chris Murphy wrote: > On Sun, Feb 16, 2020 at 2:25 AM Simeon Felis <simeon_btrfs@xxxxxxxxx> wrote: > > I had a btrfs raid1 running on raspbian (linux 4.19 arm) which > > overheated. To fix corruptions I attached the raid1 on my workstation > > (linux 5.5 x86_64) and performed scrub, defrag and --full-balance (not > > necessarily in this order) and fixed the corruptions. > > > > Back on raspbian a mount fails: > > > > root@omv:~# mount /dev/disk/by-label/URAID /mnt/URAID/ > > mount: /mnt/URAID: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error. > > [ 27.304203] BTRFS critical (device sda1): unable to find logical 4306137776128 length 4096 > Because you get this on 4.19.97 (which is the latest kernel on Arch > for ARM v7l), but it mounts OK on 5.5 on x86_64, I'm suspicious it's > an arch specific bug. I don't offhand see any applicable updates > through 4.19.103 that would fix this problem. In particular, you have a filesystem 8TB in size on a 32-bit machine. That's just below the limit of brokenness. If the balance allocated enough new logical addresses... On the other hand, the addresses mentioned here are just below 4TB. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Remember, the S in "IoT" stands for Security, while P stands ⢿⡄⠘⠷⠚⠋⠀ for Privacy. ⠈⠳⣄⠀⠀⠀⠀
