== sanity-flr test 71: check mirror extend parent fid ==== 22:54:21 (1787885661)
striped dir -i1 -c2 -H crush  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x240000404:0x1fa:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr