Thank you for the reminder. Indeed, we always use 1 MDISK statement, and other guests have a LINK to that. And we don't share data between LPARs; so we're using MDC wherever it's useful.
Geert. -----Original Message----- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Alan Altmark Sent: woensdag 29 juli 2009 21:13 To: IBMVM@LISTSERV.UARK.EDU Subject: Re: IBM DS6800 caching On Wednesday, 07/29/2009 at 02:51 EDT, Dieltiens Geert <geert.dielti...@inf.vanbreda.be> 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 DISCLAIMER This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify postmas...@vanbreda.be This footnote also confirms that this email has been checked for the presence of viruses. Informatica J.Van Breda & Co NV BTW BE 0427 908 174
