** Description changed:

  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
- intend to add later )
+ 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
+ * started balance and convert to raid 1 - took 8 to 10 hours..overnight
+ 
  btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/datanew
  
- * rebooted
+ * 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, superblock seems fine.. tried btrfs
- rescue commands.. no issues found
+ * 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..
+ * 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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https://bugs.launchpad.net/bugs/1931790

Title:
  Unable to mount btrfs RAID 1 filesystem after reboot

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