== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 01:23:38 (1726118618)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       18944     2189440   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       26624     3742720   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       28672     3740672   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       55296     7483392   1% /mnt/lustre