== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 02:59:58 (1790751598)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11340     1259964   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16212     1255092   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23752     3583268   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19856     3587164   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170432   1% /mnt/lustre