== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 00:54:20 (1734674060)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       13824     2194560   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       26624     3742720   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       27648     3741696   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       54272     7484416   1% /mnt/lustre