The "supported" migration paths are in the 'n-3' (now n-2) are that way because that is the level IBM has determined for coexistence and fallback. i.e. JES, CATALOGS, RACF, etc. can be shared with no ill effects.
Outside of the migration range (N-3 or N-2) there *IS NO COEXISTENCE or FALLBACK" the two systems must be kept logically Separate. *NO SHARING* Any attempt to share JES, CATALOGS, RACF, etc. is a potential for disaster. If such disaster occurs, you are "on you own". That being said, there is a wealth if information (including the "gotchas") in the Planning for Installation and Migration manuals. All of which should be available at the IBM Bookserver site http://www-03.ibm.com/servers/eserver/zseries/zos/bkserv/ HTH, ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
