== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 18:36:56 (1789684616)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11776     1259528   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16464     1254840   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22980     3584040   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20624     3586368   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre