[Bug 1931790] Re: Unable to mount btrfs RAID 1 filesystem after reboot - Error - device total_bytes should be at most X but found Y

[Ravindran K]

I messed with the partition tables on one of the disks and then followed
some steps to remove the failed one and recreated the new partition and
added..all in older kernel..

Same thing happened for the other disk and after rebuilding again...
effectively redoing the raid. Then, surprisingly ,booting the new kernel
worked fine. Magically 😃

Sorry I don't have the steps handy :(

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Title:
  Unable to mount btrfs RAID 1 filesystem after reboot - Error - device
  total_bytes should be at most X but found Y

Status in Ubuntu:
  New
Status in btrfs package in Ubuntu:
  New
Status in btrfs-progs package in Ubuntu:
  New

Bug description:
  Hi,

  I'm unable to mount my newly created btrfs RAID 1 filesystem after
  reboot..I performed the below steps with my 2 X 1 TB drives:

  * created a new btrfs filesystem
  mkfs.btrfs /dev/sdd1

  * mounted it to /mnt/datanew
  mount -t btrfs /dev/sdd1 /mnt/datanew

  * copied over data from my previous NTFS volume on /dev/sde1 (which I
  intended to add later as a mirror) - took 3.5 hrs

  * added a new volume
  mkfs.btrfs device add /dev/sde1

  * started balance and convert to raid 1 - took 8 to 10
  hours..overnight

  btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/datanew

  * rebooted next morning

  I seeing below errors:
  [  792.045980] BTRFS info (device sdd1): allowing degraded mounts
  [  792.045988] BTRFS info (device sdd1): disk space caching is enabled
  [  792.045990] BTRFS info (device sdd1): has skinny extents
  [  792.047498] BTRFS error (device sdd1): device total_bytes should be at most 1000201841152 but found 1000203804672
  [  792.049207] BTRFS error (device sdd1): failed to read chunk tree: -22
  [  792.051525] BTRFS error (device sdd1): open_ctree failed
  * Manual mount has below error additonally
  mount: /mnt/datanew: wrong fs type, bad option, bad superblock on /dev/sde1, missing codepage or helper program, or other error.

  * Verified the data seems intact (apparently no errors), superblock
  seems fine.. tried btrfs rescue commands.. no issues found to fix

  * Found several hits on search but not many solutions..except "btrfs filesystem resize max /" which doesnt work as I'm unable to mount in the first place..
  btrfs filesystem resize max /mnt/datanew/
  ERROR: not a btrfs filesystem: /mnt/datanew/

  Any suggestions? Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubuntu-release-upgrader-core 1:21.04.13
  ProcVersionSignature: Ubuntu 5.11.0-17.18-generic 5.11.12
  Uname: Linux 5.11.0-17-generic x86_64
  ApportVersion: 2.20.11-0ubuntu65.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  Date: Sun Jun 13 11:17:02 2021
  InstallationDate: Installed on 2021-05-16 (27 days ago)
  InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_IN:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)

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