I believe NFSv4. On the machine that contains the physical disks (is that the "server" or the "NSF mount"?) the relevant line from /etc/fstab seems to be UUID=bde58f42-4ac4-4763-b0a8-f83723f0e2a0 /home ext4 defaults 1 2 while on my front-end machine its mseas-data2:/home /home nfs defaults 0 0 where mseas-data2 is the name of the machine that contains the physical disks. Note that it isn't just root that's becoming "nobody" but all the users Thanks On 08/29/2016 07:14 PM, John R Pierce wrote: > On 8/29/2016 3:59 PM, Pat Haley wrote: >> We are running a cluster under CentOS 6.6. We recently attached a >> new NAS device, running CentOS 6.8 and rsync'd our user file system >> to it. We noticed that all the files were owned by nobody (with >> nobody as the group). We copied over the /etc/passwd and /etc/group >> files from our front-end server to our NAS server. If we log in to >> the NAS server we see the files owned by their correct owners. >> However, doing an ls from the front-end server or any of the compute >> nodes still shows the files owned by "nobody". We rebooted one of >> the compute nodes but it still sees the files owned by nobody. > > a CentOS server isn't really a 'NAS device', as NAS implies an > appliance storage device. > > this is NFS? NFSv3, or NFSv4? what NFS options are on the server > and on the NFS mount? quite often NFS servers force root to nobody. > > -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley at mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. of Mechanical Engineering Fax: (617) 253-8125 MIT, Room 5-213 http://web.mit.edu/phaley/www/ 77 Massachusetts Avenue Cambridge, MA 02139-4301