_pwrite_byte 0x61 0 $((loops * blksz)) $testdir/file1 >> $seqres.full
_pwrite_byte 0x62 0 $((loops * blksz)) $testdir/file2 >> $seqres.full
_cp_reflink $testdir/file1 $testdir/file3
-_scratch_remount
+_scratch_cycle_mount
fbytes() {
egrep -v '(61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61|62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62)'