You have the same situation, when IBM installs microcode updates. Both HMCs are 
locked so you can't IPL or do any other things. Also the BCPII interface is 
blocked. 
IBM don't tell you with that many words, but by strongly pulling out the 
consequences of an upgrade action few years ago, we finally got that 
information.

Kees.


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of Jesse 1 Robinson
Sent: 24 March, 2016 15:37
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: What happens with no working SE?

Gizmo is fixed now. No impact during SE replacement, which took longer than I 
expected. As is often the case, CEC was in Service mode the whole time, which 
would have been a problem if we had needed an emergency IPL or some such.

I just checked that the STP screens are available from the Workplace on HMC, 
that is, no SOO to SE required. However, you can manage Activation profiles 
from there too, and we all know that SE function is required for that. My main 
concern was for STP function itself. Without timing across CECs, a sysplex 
dies. 

.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler 
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-302-7535 Office
robin...@sce.com

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of R.S.
Sent: Thursday, March 24, 2016 3:11 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: (External):Re: What happens with no working SE?

No SE at all means your z/OS (or any other) system is still working, but no HW 
changes are possible, no IPL, many HW command will fail, etc. Deep sh*t.

One of two SE failed means you can peform everything you want, including STP. 
Maybe STP setup would be impossible (I haven't checked), but I'd bet it is also 
possible.
I've been working with single SE (primary failed) for some time. It wasn't my 
dream, but I could live with it.


--
Radoslaw Skorupka
Lodz, Poland

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