== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 21:47:33 (1789696053)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11424     1259880   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16100     1255204   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22732     3583896   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20852     3586056   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43584     7169952   1% /mnt/lustre