== sanity-flr test 71: check mirror extend parent fid ==== 10:38:34 (1780324714)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x240000404:0x357:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr