On 3/24/10 3:40 PM, "Alan Altmark" <alan_altm...@us.ibm.com> wrote:

> When giving guests access to real cyl 0, I suggest:
> 1. If using a full-pack mindisk, use the DEVNO version instead of volser.
> That way it doesn't matter if the guest changes the label.

Doesn't that also bind you to specific device addresses?

> 2. Use the various xxx_AT_IPL options in SYSTEM CONFIG to control the
> RDEVs that your system will use for CP-owned and user volumes listed in
> SYSTEM CONFIG. Once the system is up, have AUTOLOG1 bring any remaining
> dasd volumes online.  The purpose of these actions is to prevent CP from
> grabbing the wrong volume at IPL.

Also good comment. 

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