== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 06:42:08 (1765107728)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2209280       18688     2188544   1%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      2209280       17280     2189952   1%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3771392       28672     3740672   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       23552     3745792   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784       52224     7486464   1%  /mnt/lustre