== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 02:20:19 (1732432819)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       11776     2196608   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       28672     3714048   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3744768   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       53248     7458816   1% /mnt/lustre