== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 09:48:22 (1787406502)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       13040     1258264   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18016     1253288   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23920     3583044   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19680     3587312   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43600     7170356   1%  /mnt/lustre