We used to DEDICATE the packs to the MVS or VSE images running underneath and share across physical CECs (3090 days).
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Thursday, April 10, 2008 3:38 PM To: [email protected] Subject: Re: Ten Questions to ask a Prospective z/VM Systems Programmer On Thursday, 04/10/2008 at 02:54 EDT, "Quay, Jonathan (IHG)" <[EMAIL PROTECTED]> wrote: > To share with other LPARS you need REAL reserve/release, which I think > entails coding SHARED in on the RDEV in the system configuration file. 1. The MDISK must be defined as MWV. If you don't do that, the virtual machine will get a COMMAND REJECT on a RESERVE CCW. 2. A successful RESERVE is always enforced on the local VM system. Always. 3. If the MDISK is a fullpack minidisk (DEVNO or 0-END) then the minidisk is ELIGIBLE for real RESERVE/RELEASE. 4. If the volume containing the mdisk is defined as SHARED in SYSTEM CONFIG or via SET SHARED ON, a virtual R/R will be enforced locally AND a real R/R will flow to the volume. So the only case where a real Reserve/Release is used is MWV + fullpack + SHARED. Alan Altmark z/VM Development IBM Endicott
