Hi Guys, I had a big btrfs on a md device, it be mounted , but after a while it will become ready only: # btrfs fi df /data/ Data, single: total=24.46TiB, used=24.46TiB System, DUP: total=8.00MiB, used=2.59MiB System, single: total=4.00MiB, used=0.00B Metadata, DUP: total=81.00GiB, used=79.71GiB Metadata, single: total=8.00MiB, used=0.00B GlobalReserve, single: total=512.00MiB, used=264.28MiB # dmesg -T [Thu Aug 16 18:16:31 2018] BTRFS error (device md127): parent transid verify failed on 26603622694912 wanted 185320 found 207817 [Thu Aug 16 18:16:31 2018] BTRFS error (device md127): parent transid verify failed on 26603622694912 wanted 185320 found 207817 [Thu Aug 16 18:16:31 2018] BTRFS warning (device md127): Skipping commit of aborted transaction. [Thu Aug 16 18:16:31 2018] BTRFS: error (device md127) in cleanup_transaction:1864: errno=-5 IO failure [Thu Aug 16 18:16:31 2018] BTRFS info (device md127): forced readonly [Thu Aug 16 18:16:31 2018] BTRFS info (device md127): delayed_refs has NO entry I want to use btrfsck to check it, but it will OOM : # btrfsck /dev/md127 Checking filesystem on /dev/md127 UUID: 6b87a52f-9a5f-4d03-b345-9d954c2ce259 checking extents Killed I am trying to use lowmem mode, but as I tried before, it may OOM too, any ideas ? Thanks.
