can we go back to v4 or at least detect running kernel first?
XFS Version v5 superblock VS old kernels ( < v3.15) issues
Using recent Th provided xfsprogs|mkfs.xfs|results in created filesystem
with v5 superblock which is not fully supported in 3.14 and lower
kernels. Below message is produced in kernel log while trying to mount
such filesystem on old kernel (3.14):
[3180866.360834] XFS (dm-13): Version 5 superblock detected. This kernel has
EXPERIMENTAL support enabled!
Use of these features in this kernel is at your own risk!
[3180866.360848] XFS (dm-13): Superblock has unknown read-only compatible
features (0x1) enabled.
[3180866.360853] XFS (dm-13): Attempted to mount read-only compatible
filesystem read-write.
Filesystem can only be safely mounted read only.
[3180866.360868] XFS (dm-13): SB validate failed with error 22.
To overcome it and create v4 superblock, one need to provide
specific|mkfs.xfs|options to disable v5 features:
mkfs.xfs -m crc=0,finobt=0 /dev/sys/apus-vserver
See related issue
discussion:http://oss.sgi.com/archives/xfs/2015-08/msg00548.html
--
glen
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