== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 20:04:09 (1788825849)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17296     1254008   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9708     1261596   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26808     3580212   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       16748     3590272   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43556     7170484   1% /mnt/lustre