I've tried the 32bit -> 64bit manoeuver with Fedora and SL and failed: yum and anaconda both refuse to do it. It appears to be a forbidden transition. Martin. > -----Original Message----- > From: [log in to unmask] > [mailto:[log in to unmask]] On > Behalf Of Miles O'Neal > Sent: 01 February 2007 00:02 > To: Scientific Linux Users > Subject: SL3 32b => 64b upgrade? > > We have a bunch of 64bit Athlon > systems running a 32bit SL304 OS. > We'd like to upgrade these to the > 64bit OS. What's the easiest way > to do tis without a new install? > Or is it doable? > > Thanks, > Miles >