== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:19:23 (1787833163)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       12984     1258320   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       17928     1253376   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       27968     3578940   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       15636     3591356   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170296   1% /mnt/lustre