== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:08:53 (1790953733)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11444     1259860   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16148     1255156   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31036     3575732   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12572     3594308   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170040   1% /mnt/lustre