Cameron Kaiser wrote:
  Request for AIX consult. Is this a parity memory
error? 
   Possibly, but it looks to me more like that set of addresses failed
to respond at all.  Bad chip or bad socket.
  The unit is a PPC 604e with 512MB of parity DIMMs,
just installed last week. 
   IBM-approved RAM?  In my experience with the 604 family, installing
memory that's not approved FRUs is extremely likely to be a problem.
        Doc