== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:23:16 (1790734996)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2209920       14080     2193792   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      2210048       12032     2195968   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3771392       28672     3731456   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       21504     3742720   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       50176     7474176   1% /mnt/lustre