== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 00:18:07 (1735103887)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       22328     1265360   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21084     1266604   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      539852     3067168  15% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      536776     3070244  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1076628     6137412  15% /mnt/lustre