== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 19:45:50 (1775778350)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15608     1255696   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20928     1250376   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24052     3582884   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       19548     3587416   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43600     7170300   1%  /mnt/lustre