mkfs error: "existing superblock read failed: Inappropriate ioctl for device"

[Alexander Tsvetkov]

Hello,

I have the following error message: "existing superblock read failed: 
Inappropriate ioctl for device"
after attempt to make xfs image with "mkfs.xfs -f -m crc=1 -d 
file=1,name=xfs.fs,size=32m":

"meta-data=xfs.fs                 isize=256    agcount=2, agsize=4096 blks
          =                       sectsz=512   attr=2, projid32bit=1
          =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=8192, imaxpct=25
          =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal log           bsize=4096   blocks=853, version=2
          =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
existing superblock read failed: Inappropriate ioctl for device"

Filesystem is created and mounted as usually, xfs_repair passes, no 
messages in the system log.
Configuration: Fedora 20 x86_64 on vbox, kernel 4.0.0-rc5, xfsprogs 
version 3.2.2.

Thanks,
Alexander Tsvetkov