MDS_MASTER> mkfs.lustre --fsname=test --mdt --mgs --reformat -- failnode=MDS_SLAVER /dev/sda1 MDS_MASTER> mount.lustre /dev/sda1 /mnt/test/mdt OSS_MASTER> mkfs.lustre --fsname=test --ost --reformat -- mgsnode=MDS_SLAVE at tcp0 --mgsnode=MDS_MASTER at tcp0 -- failnode=OSS_SLAVER /dev/sdb1 OSS_MASTER> mount.lustre /dev/sdb1 /mnt/test/ost1 CLINET> mount -t lustre MDS_SLAVE at tcp0:MDS_MASTER at tcp0:/test /mnt/test/ client/ I test it and It can work. But I don'' t confirm it correct. Thanks.