== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 14:32:41 (1785090761)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11324     1259980   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16132     1255172   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22832     3583740   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20764     3586144   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43596     7169884   1%  /mnt/lustre