== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 06:46:29 (1734435989)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       22528     1265160   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21024     1266664   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      544900     3062120  16% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      531740     3075280  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1076640     6137400  15% /mnt/lustre