== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:57:57 (1787327877)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17404     1253900   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9896     1261408   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24788     3581952   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18804     3588104   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43592     7170056   1%  /mnt/lustre