I can't/won't speak for IBM but I doubt it. If you can upgrade and are thinking of V5, V5.1 is very stable and has done us well since we had it. z/VM 5.2 is really good and especially useful for the > 2G storage relief. Chances are you will be okay with V5.2 - you just have to keep in mind it is "new" and may need a little TLC. That means keeping an eye on the APAR list and doing preventive maintenance. Going with z/VM 5.1 is IMHO a good choice if you don't yet need the improvements 5.2 offers.
Either way, you can't guarantee no outages. You just have to weigh the risks and benefits of each release. _______________________________________ James Vincent Systems Engineering Consultant Nationwide Services Co., Technology Infrastructure Engineering Mainframe, z/VM and z/Linux Support One Nationwide Plaza 3-25-02 Columbus OH 43215-2220 U.S.A Voice: (614) 249-5547 Fax: (614) 677-7681 mailto:[EMAIL PROTECTED] The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> wrote on 03/28/2006 02:05:02 PM: > IBMVM@LISTSERV.UARK.EDU > > Because of the "growing pains" with 5.2, is support for z/VM 4.4 going > to be extended beyond 9/06? > > Thanks, > Alyce > > > > -----Original Message----- > From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On > Behalf Of Jim Vincent > Sent: Tuesday, March 28, 2006 11:00 AM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: Update on z/VM 5.2.0 problem > > RSU 0502 for z/VM 5.2 was just released - I would recommend that to > start > with. There have been a number of HTT001 abends due to various page > translations too that you should also get the fixes for. Some > additional > ones I presented in our Early Experiences session at SHARE include: > > VM63630 UM31541 CONTROL REGISTER 12 IN SNAPDUMP IS NOT ACCURATE > VM63785 UM31588 ABENDFRE016 HCPCDT RELEASES A RCDBK > VM63808 UM31611 AFTER AN UNPLANNED HYPERSWAP VM CAN BECOME > UNRESPONSIVE > VM63827 UM31573 ABENDMCW002 IN INSTRUCTION SIMULATION > VM63832 UM31583 LOOP IN HCPCUP AFTER CE PERFORMED CUIR OPERATION > VM63837 UM31554 VARY ON PATH FAILS TO UNSUPPORTED DPS YES DEVICE > VM63845 UM31626 HIGH HCPALS TIME IN PAGING WORKLOADS > VM63867 UM31576 STORAGE SHORTAGE, VM NOT FLUSHING USER'S NDMBK'S > VM63877 UM31606 LOCKEDRS FIELD INCORRECT IN QUERY FRAMES OUTPUT > VM63879 UM31577 GUEST ZOS SYSTEM IN VIRTUAL SYSPLEX LOOPS > VM63881 UM31591 SHUTDOWN EXPERIENCING LONG DELAYS > VM63888 UM31605 LOOP LDSF, LDDSELR, PRESENT CC2 RC2, ACCEPT CC1 > RC2 > VM63893 UM31666 IMPROVE FULL TRACK MINIDISK CACHE PERFORMANCE > VM63895 UM31613 PEVM63735 LINUX GUEST CANNOT RECONNECT TO > NETWORK > VM63897 UM31617 THE SUPPORT ELEMENT CAN'T KEEP UP WITH MSGS FROM > APAR VM63815 > VM63903 UM31669 PEVM63642 ABENDVDB007 > VM63906 UM31677 ABENDPRG004 IN HCPDPS > VM63911 UM31630 ABENDHTT001 PG TRANS EXCEPTION AT HCPIOG+778 > VM63915 UM31648 GUEST DETECTS HOT I/O ON VM LOGICAL DEVICE > VM63918 UM31659 INCORRECT LENGTH ERROR RETURNED INVALIDLY > VM63957 UM31693 ABENDHTT001 WHEN SNA USER DOES LOGOFF HOLD > VM63958 GUEST IPL UNDER Z/VM R520 IS SLOW > VM63961 SPXTAPE LOAD FILLING UP SPOOL WITH UNACCOUNTED > PAGES > VM63971 UM31705 ABENDHTT001 INCORRECT USE OF FREED TRQBK > VM63974 HCPSPO1838E PERMANENT I/O ERROR SPXTAPE RESTORE > > There may be others, but these are some of the big hitters we have found > so > far and some may not all apply to you. Considering your system up-time > requirements, you would do well to build a test system with all the > fixes > applied and let it settle in a little with your hardware/software > configuration. z/VM 5.2 was a jump in advancement for storage relief, > so > it is certainly a good thing to go to but it is still seeing a few > "growing > pains". > > We have z/VM 5.2 on 12 systems here - all but 1 are production systems. > Generally they have been running very well. As I mentioned, a couple > HTT001 abends hit us along with a pesky HPC010 that is still eluding us. > > _______________________________________ > James Vincent > Systems Engineering Consultant > Nationwide Services Co., Technology Infrastructure Engineering > Mainframe, z/VM and z/Linux Support > One Nationwide Plaza 3-25-02 > Columbus OH 43215-2220 U.S.A > Voice: (614) 249-5547 Fax: (614) 677-7681 > mailto:[EMAIL PROTECTED]
