== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 09:00:05 (1742907605)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       22292     1265396   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20760     1266928   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      539944     3067076  15% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      536716     3070304  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1076660     6137380  15% /mnt/lustre