== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:41:55 (1787474515)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11536     1259768   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16384     1254920   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28184     3578696   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       15420     3591180   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7169876   1%  /mnt/lustre