== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 20:53:46 (1775782426)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       14028     1257276   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19392     1251912   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       31156     3575864   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       12444     3594576   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43600     7170440   1%  /mnt/lustre