== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 08:13:28 (1775132008)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210176        8192     2199936   1%  /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       23552     3723264   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       25600     3743744   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784       49152     7467008   1%  /mnt/lustre