Hi! One of my build servers logged the following: [10511433.614135] BTRFS info (device md1): relocating block group 2931997933568 flags data [10511441.887812] BTRFS info (device md1): found 135 extents [10511466.539198] BTRFS info (device md1): found 135 extents [10511472.805969] BTRFS info (device md1): found 1 extents [10511480.786194] BTRFS info (device md1): relocating block group 2933071675392 flags data [10511487.314283] BTRFS info (device md1): found 117 extents [10511498.483226] BTRFS info (device md1): found 117 extents [10511506.708389] BTRFS info (device md1): relocating block group 2930890637312 flags system|dup [10511508.386025] BTRFS info (device md1): found 5 extents [10511511.382986] BTRFS info (device md1): relocating block group 2935219159040 flags system|dup [10511512.565190] BTRFS info (device md1): found 5 extents [10511519.032713] BTRFS info (device md1): relocating block group 2935252713472 flags system|dup [10511520.586222] BTRFS info (device md1): found 5 extents [10511523.107052] BTRFS info (device md1): relocating block group 2935286267904 flags system|dup [10511524.392271] BTRFS info (device md1): found 5 extents [10511527.381846] BTRFS info (device md1): relocating block group 2935319822336 flags system|dup [10511528.766564] BTRFS info (device md1): found 5 extents [10857025.725121] BTRFS info (device md1): relocating block group 2934145417216 flags data [10857057.071228] BTRFS info (device md1): found 1275 extents [10857073.721609] BTRFS info (device md1): found 1231 extents [10857086.237500] BTRFS info (device md1): relocating block group 2935386931200 flags data [10857095.182532] BTRFS info (device md1): found 151 extents [10857125.204024] BTRFS info (device md1): found 151 extents [10857133.473086] BTRFS info (device md1): relocating block group 2935353376768 flags system|dup [10857135.063924] BTRFS info (device md1): found 5 extents [10857138.066852] BTRFS info (device md1): relocating block group 2937534414848 flags system|dup [10857139.542984] BTRFS info (device md1): found 5 extents [10857142.083035] BTRFS info (device md1): relocating block group 2937567969280 flags system|dup [10857143.664667] BTRFS info (device md1): found 5 extents [10857145.971518] BTRFS info (device md1): relocating block group 2937601523712 flags system|dup [10857146.924543] BTRFS info (device md1): found 5 extents [10857150.289957] BTRFS info (device md1): relocating block group 2937635078144 flags system|dup [10857152.173086] BTRFS info (device md1): found 5 extents [10860370.725465] scrub_handle_errored_block: 71 callbacks suppressed [10860370.764356] btrfs_dev_stat_print_on_error: 71 callbacks suppressed [10860370.764359] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2291, gen 0 [10860370.764593] scrub_handle_errored_block: 71 callbacks suppressed [10860370.764595] BTRFS error (device md1): unable to fixup (regular) error at logical 593483341824 on dev /dev/md1 [10860395.236787] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2292, gen 0 [10860395.237267] BTRFS error (device md1): unable to fixup (regular) error at logical 595304841216 on dev /dev/md1 [10860395.506085] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2293, gen 0 [10860395.506560] BTRFS error (device md1): unable to fixup (regular) error at logical 595326820352 on dev /dev/md1 [10860395.511546] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2294, gen 0 [10860395.512061] BTRFS error (device md1): unable to fixup (regular) error at logical 595327647744 on dev /dev/md1 [10860395.664956] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2295, gen 0 [10860395.664959] BTRFS error (device md1): unable to fixup (regular) error at logical 595344850944 on dev /dev/md1 [10860395.677733] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2296, gen 0 [10860395.677736] BTRFS error (device md1): unable to fixup (regular) error at logical 595346452480 on dev /dev/md1 [10860395.770918] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2297, gen 0 [10860395.771523] BTRFS error (device md1): unable to fixup (regular) error at logical 595357601792 on dev /dev/md1 [10860395.789808] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2298, gen 0 [10860395.790455] BTRFS error (device md1): unable to fixup (regular) error at logical 595359870976 on dev /dev/md1 [10860395.806699] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2299, gen 0 [10860395.807381] BTRFS error (device md1): unable to fixup (regular) error at logical 595361865728 on dev /dev/md1 [10860395.918793] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2300, gen 0 [10860395.919513] BTRFS error (device md1): unable to fixup (regular) error at logical 595372343296 on dev /dev/md1 [10860395.993817] BTRFS error (device md1): bdev /dev/md1 errs: wr 0, rd 0, flush 0, corrupt 2301, gen 0 [10860395.994574] BTRFS error (device md1): unable to fixup (regular) error at logical 595384438784 on dev /dev/md1 [11033396.165434] md: data-check of RAID array md0 [11033396.273818] md: data-check of RAID array md2 [11033396.282822] md: delaying data-check of md1 until md0 has finished (they share one or more physical units) [11033406.609033] md: md0: data-check done. [11033406.623027] md: data-check of RAID array md1 [11035858.847538] md: md2: data-check done. [11043788.746468] md: md1: data-check done. For obvious reasons the "BTRFS error (device md1): unable to fixup (regular) error" lines made me nervous and I would like to understand better what is going on. The system has ECC memory with md1 being a RAID1 which passes all health checks. I tried to find the inodes behind the erroneous addresses without success. e.g. $ btrfs inspect-internal logical-resolve -v -P 593483341824 / ioctl ret=0, total_size=4096, bytes_left=4080, bytes_missing=0, cnt=0, missed=0 $ echo $? 1 My kernel is 4.12.14-lp150.12.64-default (OpenSUSE 15.0), so not super recent but AFAICT btrfs should be sane there. :-) What could cause the errors and how to dig further? Thanks, //richard
