== sanity-flr test 71: check mirror extend parent fid ==== 11:09:36 (1787584176)
striped dir -i1 -c2 -H crush  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x240000405:0x1c8:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr