All of the discussion here has dealt with the capability to configure 
CHPIDs offline and online from the HMC/SE.  This is NOT a new capability - 
it's been around for a long time.

The recommendation you cited STILL STANDS.  Don't vary CHPIDs offline from 
the hardware if it is possible to do so from the operating system.

I've checked the PR/SM Planning Guide (SB10-7041-01a, Oct 2006), the HMC 
Operations Guide (SC28-6857-01, Nov 2006), and the SE Operations Guide 
(SC28-6858-01, Nov 2006) and can find NOTHING that says it is now SAFE to 
configure CHPIDs out from under running operating systems.

Be warned.  I think it is possible that some doc made it into the z/OS 1.8 
manual which is not yet actually in the hardware.

Brian

On Fri, 15 Dec 2006 14:11:50 -0600, Alan C. Field wrote:

>
>More interesting though is the recommendation to use this method. I
>suppose a change
>has been made in z/OS 1.8 as I've always seen it recommended that to CF
>the CHP offline to
>the OS and only use this technique as a last resort.
>

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