== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 01:41:14 (1788932474)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       16380     1254924   2% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3833116       20648     3586232   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22408     3584500   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43056     7170732   1% /mnt/lustre