== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 18:30:10 (1778625010)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210048        8192     2199808   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3741696   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3739648   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7481344   1%  /mnt/lustre