Hi Clovis, >>> No need, 0-END (or 1-END) is not mandatory. A clearer way of saying this might be “you only need to CPFMTXA the cylinders you intend to use for PAGE”, since MOST shops use full packs for PAGE that’s why it was expressed as 0-END/1-END. :) Simply DDR’ing cylinder 0 of your PAGE packs will likely lead to a system failure the first time CP tries to use improperly formatted cylinders. -Mike From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of gclo...@br.ibm.com Sent: Tuesday, August 09, 2011 2:26 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: z/vm page packs at DR Hi. No need, 0-END (or 1-END) is not mandatory. You can use only pieces of dasd for each type, but all referenced in alloc map, not PERM type, MUST be formatted. If not, you get the paging errors. To make a one-pack VM, have the VMRES mdisks, some cylinders for page and some for spool. The minimum needed to get CMS running. All in the same pack.
PS. And is possible (not practical) to start with an empty SPOOL: 1. Restore VMRES, 2. format page/spool, 3. IPL VM, 4. logon MAINT (IPL 190), 5. create the segments and all the other SDFs (or restore them from one tape). 6. Followed by a new IPL. I saw people working this way ( I help them) in the past. Personally, nowaday this way looks more an academic POC than a valid DR exercise... ______________________________________________ Clovis From: Scott Rohling <scott.rohl...@gmail.com> To: IBMVM@LISTSERV.UARK.EDU Date: 09/08/2011 14:19 Subject: Re: z/vm page packs at DR Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> _____ Don't you still need to format 1-END? In my experience, you can end up with paging errors if the dasd isn't initialized/formatted. Haven't tried just cylinder 0 though, so I could be wrong.. Scott Rohling On Tue, Aug 9, 2011 at 6:06 AM, Gentry, Steve <steve.gen...@westernsouthernlife.com> wrote: We backup cyl 0 (zero) of the page packs just to avoid having to run ICKDSF to put a label on the packs. We then, of course, restore that cyl 0 at DR. Steve From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Crabtree, Anne D Sent: Tuesday, August 09, 2011 8:03 AM To: IBMVM@LISTSERV.UARK.EDU Subject: z/vm page packs at DR I currently back up all my z/vm packs (res,page,spool) via an adrdssu job on z/os each Sunday. At the DR site, I run an adrdssu restore job for these packs. This method works fine, however, I’m wondering if backing up the page packs is necessary? I was thinking that maybe I could backup only 1 page pack so that I can get z/vm up and then just init the remaining packs after coming up. Since the page packs are listed as cpvols in system config, would z/vm even come up if it couldn’t find all of them? Seems like a waste of time to back them up… At DR site, we bring up a z/os “rescue” system in order to run restore jobs for both z/os and z/vm volumes. Afterwards, our z/vm and z/os systems run as second level guests. Maybe I need a “rescue” z/vm system as well? Just wondering what everyone else does. Anne D. Crabtree System Programmer WV Office of Technology Data Center 1900 Kanawha Blvd East Charleston, WV 25305 (304)558-5914 ext 58292 <tel:%28304%29558-5914%20ext%2058292> (304)558-1441 <tel:%28304%29558-1441> fax
