== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 03:12:11 (1761289931)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210304       10368     2197888   1%  /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       22528     3746816   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       25600     3743744   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784       48128     7490560   1%  /mnt/lustre