Thank you Ronald for your prompt reply. I am now able to install lustre-server on mds. In fact I am not willing to do so but did not find a way to assign 'Qluster Image' with loaded module of lustre-server to assign for a particular node(s). If you know the way please suggest me the better way. I know how to create Qlustar Image as well. My plan is to boot the ost and mgs nodes as diskless initially than make lustre partition on them (has already 24 disks in two arrays of RAID6). Sincerely, Rajendra