== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:56:25 (1788540985)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11732     1259572   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16696     1254608   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28836     3578156   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14836     3592128   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43672     7170284   1% /mnt/lustre