== sanity-flr test 71: check mirror extend parent fid ==== 10:10:13 (1781273413)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x200000405:0x55:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr