When setting up RAID installation, curtin failed on/after wiping RAID block device backed by IMSM

[Yao Wei]

The following error in curtin is captured when using ubuntu-desktop-installer to install noble:

        Running command ['partprobe', '/dev/md127'] with allowed return codes [0, 1] (capture=False)
        Warning: Error fsyncing/closing /dev/md127: Input/output error
        Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
        TIMED udevadm_settle(): 0.002
        devsync happy - path /dev/md127 now exists
        return volume path /dev/md127
        RAID validation: name=/dev/md126 raidlevel=raid1 devices=[] spares=[] container=/dev/md127
        Running command ['mdadm', '--query', '--detail', '--export', '/dev/md126'] with allowed return codes [0] (capture=True)
        Running command ['mdadm', '--query', '--detail', '--export', '/dev/md126'] with allowed return codes [0] (capture=True)
        RAID array OK: /dev/md126
        Verified /dev/md126 raid composition, raid is OK
        raid /dev/md126 already present, skipping create
        Wiping raid device /dev/md126 mode=superblock-recursive
        Running command ['wipefs', '--all', '--force', '/dev/md126'] with allowed return codes [0] (capture=False)
        /dev/md126: 8 bytes were erased at offset 0x00000200 (gpt): 45 46 49 20 50 41 52 54
        /dev/md126: 8 bytes were erased at offset 0x3b9dc7ffe00 (gpt): 45 46 49 20 50 41 52 54
        /dev/md126: 2 bytes were erased at offset 0x000001fe (PMBR): 55 aa
        An error occured handling 'raid-md126': KeyError - 'partition'
        finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: configuring raid: raid-md126
        TIMED BLOCK_META: 1.442
        finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: curtin command block-meta
        Traceback (most recent call last):
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/commands/main.py", line 202, in main
            ret = args.func(args)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/log.py", line 97, in wrapper
            return log_time("TIMED %s: " % msg, func, *args, **kwargs)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/log.py", line 79, in log_time
            return func(*args, **kwargs)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/commands/block_meta.py", line 127, in block_meta
            return meta_custom(args)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/commands/block_meta.py", line 2278, in meta_custom
            handler(command, storage_config_dict, context)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/commands/block_meta.py", line 1853, in raid_handler
            block.wipe_volume(md_devname, mode=wipe_mode, exclusive=False)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/block/__init__.py", line 1345, in wipe_volume
            quick_zero(path, partitions=True, exclusive=exclusive)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/block/__init__.py", line 1245, in quick_zero
            ptdata = sysfs_partition_data(path)
          File "/snap/ubuntu-desktop-bootstrap/113/lib/python3.10/site-packages/curtin/block/__init__.py", line 1014, in sysfs_partition_data
            data['partition'],
        KeyError: 'partition'
        'partition'

All logs attached in the attachment.