== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 20:44:03 (1786409043)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210048        8192     2199808   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3742720   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       26624     3740672   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7483392   1%  /mnt/lustre