== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 14:26:15 (1772911575)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       16764     1254540   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       23432     1247872   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       27308     3579712   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17248     3589772   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       44556     7169484   1%  /mnt/lustre