== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 01:46:00 (1788846360)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11392     1259912   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16248     1255056   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24640     3582324   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18968     3587996   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170320   1% /mnt/lustre