== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 00:42:48 (1787719368)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17640     1253664   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9896     1261408   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29016     3578004   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14572     3591972   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43588     7169976   1% /mnt/lustre