== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 23:29:47 (1788665387)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17908     1253396   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10448     1260856   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30772     3576136   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12808     3593848   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43580     7169984   1% /mnt/lustre