I''ve built Xen 2.0.3 (stable) on a 2-way server with 4 GB of memory (8 GB during the make). When I boot Xen it complains "Not enough memory for DOM0 memory reservation". I get this same message with dom0_mem enties of ''1'', ''65536'', and ''131072''. Note the hosting OS during the build is a pristine install of RH 9.0. The host is an IBM HS-20 blade server. Chuck If self-replicating chemicals had as hard a time reaching maturity as good ideas, this planet would still be lifeless. Robert Qualkinbush