== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 09:08:02 (1788613682)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17420     1253884   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16252     1255052   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26712     3579832   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       16888     3589964   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43600     7169796   1%  /mnt/lustre