== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 07:36:36 (1788953796)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13440     1257864   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18016     1253288   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25956     3580980   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17652     3589284   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170264   1% /mnt/lustre