I have a 4507R with redundant Sup IV's running IOS 12.2(25)EWA6. They are in SSO mode, however one is in Standby Cold, not Standby Hot. So if I try "redundancy force-switchover" it tells me the standby is not ready. I have searched and cannot find how to force the standby Sup to go from cold to hot. An identical 4507R next to this one, same Sups, same IOS, same redundancy mode, is fine with the standby in "hot" mode.
Any ideas? This is a production system, so the maintenance window is closed for the day, but I can try things again early tomorrow.