== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 07:57:46 (1768568266)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15984     1255320   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21516     1249788   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26824     3580196   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       16724     3590296   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43548     7170492   1%  /mnt/lustre