== sanity-flr test 50b: mirror rsync handles sparseness == 09:50:05 (1746625805)
 ** create mirrored file /mnt/lustre/d50b.sanity-flr/f50b.sanity-flr
 ** write data chunk at 1M boundary
20+0 records in
20+0 records out
20480 bytes (20 kB) copied, 0.0153899 s, 1.3 MB/s
 ** create hole at the file end
 ** verify sparseness
    first data offset: 1044480
    hole at the end: 3500000
 ** resync mirror #2 to mirror #1
 ** consumed blocks: 96
 ** truncate file down
 ** write data chunk at 2M boundary
20+0 records in
20+0 records out
20480 bytes (20 kB) copied, 0.00529193 s, 3.9 MB/s
 ** resync mirror #2 to mirror #1 with nosync 1st component
 ** resync mirror #2 to mirror #1 again
 ** final consumed blocks: 96