Per Qvindesland wrote: \> In the company we are working for we are looking at buying a p520 system > with HACMP, that it why I am looking for a ppc version. RHEL 4 and 5 both works great on the IBM power systems. Ditto for PowerHA (nee HACMP) version 5.4 for both AIX and Linux. With the p520, I would seriously consider using AIX too. Many Linux tools are available there and depending on your apps you might get better scalability and stability. -- //Morten