== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 03:07:36 (1762502856)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       19584     1268104   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16300     1271388   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24748     3582272   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       18772     3588248   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       43520     7170520   1% /mnt/lustre