;-) my test boxes:
scnode1# uname -a
SunOS scnode1 5.10 Generic_118822-27 sun4u sparc SUNW,Ultra-Enterprise
scnode1# prtdiag | head -1
System Configuration: Sun Microsystems sun4u 8-slot Sun Enterprise E4500/E5500
scnode2# uname -a
SunOS scnode2 5.10 Generic_118822-27 sun4u sparc SUNW,Ultra-Enterprise
scnode2# prtdiag | head -1
System Configuration: Sun Microsystems sun4u 5-slot Sun Enterprise E3500
and it is supported ...
sunsolve
could you post the command which you use to uncompress the r&s patchcluster and what is the "out" file name?
gP