== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 23:54:23 (1775879663)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       14768     1256536   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20500     1250804   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24736     3582284   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       18796     3588224   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43532     7170508   1%  /mnt/lustre