== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 16:11:15 (1786047075)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17380     1253924   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9592     1261712   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30104     3576888   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       13500     3593520   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1%  /mnt/lustre