== sanity-flr test 50d: mirror rsync keep holes ========== 09:42:59 (1773668579)
 ** create mirrored file /mnt/lustre/d50d.sanity-flr/f50d.sanity-flr
 ** write data chunk at 1M boundary
20+0 records in
20+0 records out
20480 bytes (20 kB, 20 KiB) copied, 0.0310243 s, 660 kB/s
 ** create hole at the file start
 ** verify sparseness
    first data offset: 1048576
 ** resync mirror #2
 ** verify sparseness of mirror #2
    first data offset: 1048576