== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 21:47:34 (1787795254)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17620     1253684   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10156     1261148   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30096     3576784   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       13512     3593368   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170152   1%  /mnt/lustre