== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:21:05 (1788942065)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17324     1253980   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9872     1261432   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25040     3581532   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18560     3588292   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43600     7169824   1%  /mnt/lustre