$XFS_IO_PROG -xc "resblks 16" $SCRATCH_MNT >> $seqres.full 2>&1
dd if=/dev/zero of=$SCRATCH_MNT/file bs=4k >> $seqres.full 2>&1
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/file >> $seqres.full 2>&1
-size=`stat -c %s $SCRATCH_MNT/file`
+size=`_get_filesize $SCRATCH_MNT/file`
for i in $(seq 0 8192 $size); do
$XFS_IO_PROG -c "fpunch $i 4k" $SCRATCH_MNT/file >> $seqres.full 2>&1
done