That's probably overkill for what she's actually doing. All her systems are second level under her main z/VM, so all she really needs to do is
define the MDISKs on the 1st level system and then have the second level systems link to the MDISKs in the correct mode for whether they need to read or write to each MDISK. She seems to have figured out her problem, and my guess is it was either a link mode problem, VMSECURE rules problem, or something similarly simple. Brian Nielsen On Thu, 3 Aug 2006 20:24:36 +0200, Kris Buelens <[EMAIL PROTECTED]> wrote: >We also do share some volumes amongst all our VM systems. On thses shar ed >packs, we do define all minidisks on all VM systems and have an exec tha t >nightly checks that all MDISKs on those voumes are in fact identical. >To protect ourselves from accidents, we enabled XLINK (part of VM's CSE >functions). XLINK will avoid that two VM systems have concurrent >conflicting links. Just like that a simple "LINK xxx vdev vdev M" can >fail with a message "xxx vdev not linked, R/W by uid", CP can then respo nd > "xxx vdev not linked, R/W by VMxyz" >What you need to to is define a table with all your VM systems in SYSTEM >CONFIG, include the volsers in some XLINK other statement in SYSTEM >CONFIG, issue some XLINK FORMAT command to format an area on the shared >volumes, protect this area by some $xxx$ minidisk so that you do not >accidentally define a user mdisk on top of it. > >The only drawback is that you must IPL to make it active; there are no C P >commands to dynamically define/change the SYSTEM CONFIG statements. > >Last but not least: define the volumes as SHARED (on RDEVICE in SYSTEM >CONFIG, or with CP SET SHARED ON), so CP will turn off MDC for those >volumes. > >Kris, >IBM Belgium, VM customer support > > > > >"Dusha, Cecelia Ms. WHS/ITMD" <[EMAIL PROTECTED]> >Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> >2006-08-03 10:35 >Please respond to >The IBM z/VM Operating System > > >To >IBMVM@LISTSERV.UARK.EDU >cc > >Subject >Shared Volumes > > > > > > > >Hello, > > > >I would like to share a volume on multiple zVM systems. Each system wou ld >have different area on the volume they could write to, the other areas >would be read only. Each system needs to be able to write to this volum e >at the same time. Is this do-able? If so, how is this done? > > > >Please advice. > > >Thank you. > > > >Cecelia Dusha > > > > >======================== ========================= ========================
