== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 22:40:07 (1763350807)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17236     1254068   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       15992     1255312   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       29004     3578016   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       14608     3592412   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43612     7170428   1%  /mnt/lustre