== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:31:35 (1788784295)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        8448     2199552   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       24576     3744768   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3716096   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7460864   1% /mnt/lustre