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Description of problem:
[root@hp-dl388g8-03 ~]# grep xfs /proc/mounts 
/dev/mapper/vg_hpdl388g803-lv1t /mnt/xfs xfs rw,seclabel,relatime,attr2,delaylog,logbsize=256k,sunit=512,swidth=6144,noquota 0 0
[root@hp-dl388g8-03 ~]# rpm -q xfsprogs
xfsprogs-3.1.1-16.el6.x86_64

xfs_io could not write to /mnt/xfs/null

[root@hp-dl388g8-03 ~]# xfs_io -c "pwrite 0 512" /mnt/xfs/null
xfs_io: specified file ["/mnt/xfs/null"] is not on an XFS filesystem

If I add -F option, xfs_io works
[root@hp-dl388g8-03 ~]# xfs_io -Fc "pwrite 0 512" /mnt/xfs/null
wrote 512/512 bytes at offset 0
512.000000 bytes, 1 ops; 0.0000 sec (244 MiB/sec and 500000.0000 ops/sec)

It's an xfs partition, with/without -F should not make any difference

Version-Release number of selected component (if applicable):
xfsprogs-3.1.1-16.el6

How reproducible:
always

Steps to Reproduce:
1. see description
2.
3.

Actual results:


Expected results:


Additional info:
I think this is low priority, found this after verifying bug 1018751

d1b8818 xfs_io: deprecate the "-F" foreign flag

fixes this.

Let's fix this in RHEL6.8 as well, since we're going to update xfsprogs.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0898.html