== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:31:23 (1788535883)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17596     1253708   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10208     1261096   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25792     3581172   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17816     3589148   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170320   1% /mnt/lustre