== sanity-flr test 71: check mirror extend parent fid ==== 10:36:21 (1788359781)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x240000405:0x24c:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr