== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 03:23:28 (1738484608)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       14872     1272816   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21976     1265712   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      544548     3062472  16% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      530984     3076036  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1075532     6138508  15% /mnt/lustre