Beim Versuch ein Dateisystem zu erweitern, kommt die Meldung Volume group “mapper” inconsistent, run as master to correct

[root@xen211 /]# lvextend -v -L +50G /dev/mapper/VG_XenStorage--3e227c64--99d9--c1f5--1d72--05f3ed48ea75-datalv
    Finding volume group mapper
    Wiping cache of LVM-capable devices
  Volume group "mapper" inconsistent, run as master to correct

[root@xen211 /]# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "VG_XenStorage-0cea7c5a-98a6-5f45-8586-5ba74a57a9e2" using metadata type lvm2
  Found volume group "VG_XenStorage-2e39432c-8298-a787-ddb4-a014123b1273" using metadata type lvm2
  Found volume group "VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75" using metadata type lvm2

[root@xen211 /]# lvextend -v --master -L +50G /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv
    Finding volume group VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75
    Archiving volume group "VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75" metadata (seqno 23).
  Extending logical volume datalv to 150.00 GB
    Creating volume group backup "/etc/lvm/backup/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75" (seqno 24).
    Found volume group "VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75"
    Found volume group "VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75"
    Loading VG_XenStorage--3e227c64--99d9--c1f5--1d72--05f3ed48ea75-datalv table
    Suspending VG_XenStorage--3e227c64--99d9--c1f5--1d72--05f3ed48ea75-datalv (252:4) without device flush
    Found volume group "VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75"
    Resuming VG_XenStorage--3e227c64--99d9--c1f5--1d72--05f3ed48ea75-datalv (252:4)
  Logical volume datalv successfully resized

[root@xen211 /]# resize2fs /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv
resize2fs 1.39 (29-May-2006)
Please run 'e2fsck -f /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv' first.

[root@xen211 /]# e2fsck -f /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv
e2fsck 1.39 (29-May-2006)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv: 43834/13107200 files (0.2% non-contiguous), 4393252/26214400 blocks

resize2fs 1.39 (29-May-2006)
Resizing the filesystem on /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv to 39321600 (4k) blocks.
The filesystem on /dev/VG_XenStorage-3e227c64-99d9-c1f5-1d72-05f3ed48ea75/datalv is now 39321600 blocks long.