On Tue, 7 Jun 2011 11:14:44 -0400, Michael Coffin <michaelcof...@mccci.co m> wrote:
> Is it even possible to store a new IOCDS, mark it >as active for the next POR AND have CP add/change/delete IO definitions by >comparing the prior IOCDS with the newly activated one? Yes, that's precisely what HCD does. HCD will compare the new I/O configuration and the current I/O configuration, and will dynamically update the current I/O configuration to match the new one. As it does that, each LPAR whose OS is enabled for dynamic I/O will receive notification of any updated I/O componentry. In CP's case, that means bringing paths and devices online (subject to SYSTEM CONFIG and prior VAR Y commands). Unlike HCD on z/VM, HCD on z/OS knows how to do everything for all device s used by all operating systems. This is why when VM and MVS are on the same box, you let HCD on MVS do all the heavy lifting. Alan Altmark IBM
