== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 23:32:55 (1786419175)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17544     1253760   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10264     1261040   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24048     3582664   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19540     3587368   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43588     7170032   1%  /mnt/lustre