https://bugs.kde.org/show_bug.cgi?id=488729

            Bug ID: 488729
           Summary: Resize second disk on btrfs multi device (raid1)
                    returns error
    Classification: Applications
           Product: partitionmanager
           Version: 23.08.0
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: andr...@stikonas.eu
          Reporter: abe...@gmail.com
  Target Milestone: ---

SUMMARY
btrfs raid1 with 2 partitions (sda1 sdb1)

KDE partition manager shows correct info:
Partition    Type    Mount Point     Label
/dev/sda1    btrfs    /mnt/point/  testbtrfs
/dev/sdb1    btrfs                 testbtrfs
Note: Mount Point of /dev/sdb1 is empty (matches with df)

Online Resize /dev/sda1 works as expected
Online Resize /dev/sdb1 returns below error:


OBSERVED RESULT

Job: Check file system on partition ‘/dev/sdb1’ 
Command: btrfs check --repair /dev/sdb1 
Check file system on partition ‘/dev/sdb1’: Error
Checking partition ‘/dev/sdb1’ before resize/move failed. 
Grow partition ‘/dev/sdb1’ from 97.66 GiB to 146.48 GiB: Error


EXPECTED RESULT

Online resize/grow successful


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 24.04 
(available in About System)
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13

ADDITIONAL INFORMATION
It looks like KDE Partition Manager is treating the 2nd disk in a btrfs raid1
array as unmounted, and not interpreting it as part of a btrfs raid1 array.

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