== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:58:44 (1787576324)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13568     1257736   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18040     1253264   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30772     3576248   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12832     3594188   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170436   1% /mnt/lustre