== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 06:33:45 (1775212425)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       13704     1257600   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19028     1252276   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       27952     3579012   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       15652     3591340   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43604     7170352   1%  /mnt/lustre