Sorry for my late reply (was on vacation last week). Again, when there are multiple OAM's sharing an IBM robot they are EACH polled individually when a new tape is inserted to find out who wants to take ownership. Only 1 z/OS system can take ownership of any tape; and the first OAM that says "its mine" gets it. However, the polling order is "last system to take ownership get's polled first" (since the last system to respond was online and active, stands to reason might as well start with that system).
Where the REAL problem probably lies is that when the CBRUXENT/EJC exits were first added to CA-1 (many years ago, when the IBM robots first were introduced) we "assumed" the default for a "foreign" tape should be "take ownership as a private volume". This was to allow foreign tapes to be inserted and "owned" by the z/OS system as a non-scratch tape. The problem this introduced was in this case of a shared robot; and having multiple systems/lpar's sharing a single robot has become more and more common (probably the norm by now). So many years ago (5+ I believe) we changed the CBRUXENT sample source so that a foreign tape was left in the "insert pending" category (and therefore other systems would be polled). If you have not re-assembled your CA-1 supplied CBRUXENT exit in many years; or are very far back in terms of CA-1 maintenance you might still have the version that takes ownership of foreign tapes. Please contact CA-1 level-1 support for assitance on this. Russell Witt CA-1 Level-2 Support Manager -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] Behalf Of Jack Kelly Sent: Friday, March 09, 2007 9:51 AM To: [email protected] Subject: Re: 2 LPARS Sharing 3494 ATL - Why does SY1 always update TCDB ? I'm probably going back too far (2-3 yrs) but the d/t 3494 would present the insert to whichever system answered up first not all systems. From what has been said, it appears that's changed? Jack Kelly LA Systems @ US Courts x 202-502-2390 ---------------------------------------------------------------------- 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
