== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 07:56:20 (1741694180)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       16512     2191872   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       29696     3739648   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       26624     3742720   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       56320     7482368   1% /mnt/lustre