== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 06:42:34 (1788259354)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210176        8576     2199552   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       24576     3735552   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3739648   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7475200   1% /mnt/lustre