== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:31:38 (1786807898)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2209920       12160     2195712   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      2209920       10112     2197760   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3771392       33792     3720192   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       16384     3743744   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       50176     7463936   1%  /mnt/lustre