>>> On 6/13/2012 at 06:50 PM, Grzegorz Powiedziuk <gpowiedz...@gmail.com> 
>>> wrote: 
> /dev/mapper/20017380062aa0048_part1 on /mnt/thin_test_btrfs type btrfs (rw)
> 
> d2ora000:/var/log # fstrim  /mnt/thin_test_xfs/
> fstrim: /mnt/thin_test_xfs/: FITRIM ioctl failed: Operation not supported

Those are not the same two mount points.
/mnt/thin_test_btrfs
/mnt/thin_test_xfs


Mark Post

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