Have completed two clean installs of CentOS 5 with no issues (other than permissions on ~/.ssh directory. One 32 bit system, one 64 bit. When I tried an upgrade from 4.4 on 64 bit system with two SATA drives in Raid 1 configuration, anaconda could not mount the root partition /dev/md1. The error message suggested it was because the partition was not formated which is obviously not correct. Any thoughts appreciated. Thanks in advance. B.J. McClure CentOS 4.4, Linux 2.6.9-42.0.10.ELsmp x86_64 19:37:58 up 10 min, 2 users, load average: 0.10, 0.19, 0.14