Because NFSv3 does owner and group by uid/gid and NFSv4 does it by id mapping.
How do you determine the ID domain a machine thinks it belongs to? ultralord # cat /var/run/nfs4_domain excfb.com How do I change the ID domain (without rebooting)? Edit //etc/default/nfs/ and then: ultralord # cat /var/run/nfs4_domain internal.excfb.com Edit magic! ultralord # svcadm restart svc:/network/nfs/mapid ultralord # cat /var/run/nfs4_domain excfb.com You need the ID domain to be the same on both client and server....
