== sanity-flr test 71: check mirror extend parent fid ==== 02:39:18 (1787121558)
striped dir -i1 -c2 -H crush  /mnt/lustre/d71.sanity-flr
 ** lfs fid2path /mnt/lustre 0x240000405:0x18d:0x0
/mnt/lustre/d71.sanity-flr/f71.sanity-flr