== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 05:47:29 (1773740849)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210176        9472     2198656   1%  /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       24576     3742720   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       25600     3741696   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784       50176     7484416   1%  /mnt/lustre