== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 01:51:07 (1788673867)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210176        8576     2199552   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3741696   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3738624   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7480320   1% /mnt/lustre