Hi, I rebooted some CEPH servers with 24 HDs and do get some messages for some of the disks: [ 519.667055] XFS (sdk1): Mounting V4 Filesystem [ 519.692307] XFS (sdk1): Ending clean mount [ 519.781975] attempt to access beyond end of device [ 519.781984] sdk1: rw=0, want=1560774288, limit=1560774287 All disks are xfs formated and currently I don't see any problem on the CEPH side. But I have a bad feeling. I updated the kernel too from kernel-3.10.0-514.21.1 to kernel-3.10.0-514.26.1, but nothing changed. Any hints, suggestions? Thanks & regards . Götz