== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 19:17:54 (1790723874)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17808     1253496   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10448     1260856   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30840     3575788   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12748     3594272   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43588     7170060   1% /mnt/lustre