== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 20:43:03 (1787704983)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17768     1253536   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10108     1261196   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31008     3575620   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12572     3594336   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43580     7169956   1% /mnt/lustre