== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:38:32 (1787834312)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210176        8320     2199808   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3742720   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       26624     3737600   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7480320   1%  /mnt/lustre