== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 06:07:35 (1787393255)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210176        8576     2199552   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3736576   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3734528   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7471104   1%  /mnt/lustre