On Wednesday, 07/29/2009 at 02:51 EDT, Dieltiens Geert <[email protected]> wrote: > But in our development VM (with 3 busy VSE guests) I've always used MDC > for the Dynam catalog MDISK and never had any problem with it.
Within a single z/VM system, MDC is fine as long as you use LINKs to a single MDISK. But if you create separate MDISKs (without NOMDC) rather than using LINKs, I am told the system will create a separate cache for each MDISK and your data will be toast. MDC must be turned off if you are sharing with other LPARs. Alan Altmark z/VM Development IBM Endicott
