== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:51:39 (1779699099)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17848     1253456   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10428     1260876   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20596     3586396   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       23008     3583984   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170380   1%  /mnt/lustre