== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 00:57:29 (1787893049)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        8192     2199808   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3720192   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       26624     3742720   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7462912   1% /mnt/lustre