== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:36:16 (1788266176)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17512     1253792   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9784     1261520   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31908     3575056   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       11700     3595264   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170320   1% /mnt/lustre