== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:21:08 (1787833268)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210304        9088     2199168   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3745792   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3723264   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       49152     7469056   1%  /mnt/lustre