Per Qvindesland wrote: > Hi > > Thanks for your feedback. > > 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. > > I'd run AIX on that. PowerHA (formerly known as HACMP) is still primarily an AIX cluster, with only limited linux support. the extent of that support is detailed here, http://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=dd&subtype=sm&appname=pseries&htmlfid=897/ENUS5765-G71 says specifically, RHEL4 or SuSE LES 9. Full PowerHA for AIX features -> http://www-03.ibm.com/systems/power/software/availability/aix/faq/index.html I would also involve IBM as much as possible in the setup and configuration of any such cluster, unless you have a large amount of time to waste trying to sort out all the pieces.