That's my next step.  In the morning I'll delete that rogue boot image from 
SCCM and give it a try.

I was going to try it this afternoon but got pulled off on a production problem.

Thanks
Mike

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Jason Sandys
Sent: Monday, August 8, 2016 2:27 PM
To: mssms@lists.myitforum.com
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

Have you deleted the boot image altogether?

What happens if you create a new TS? Does that boot image ID still show up?

J

From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Marable, Mike
Sent: Monday, August 8, 2016 1:10 PM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

No, we have never used that boot image.  It's not assigned to any task 
sequences and is no longer on any of the DPs ore the PXE server.

It is not the image that the system is booting from either.  As the system is 
booting below the progress bar it shows CM1008BE which matches what the SMSTS 
log shows as loading.

I was really hoping that removing that boot image was going to fix the problem.


From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Jason Sandys
Sent: Monday, August 8, 2016 1:31 PM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

That's the boot image being delivered though (based on the log snippet provided 
earlier). Are there any task sequences deployed at all with that boot image 
assigned?

J

From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Marable, Mike
Sent: Monday, August 8, 2016 11:29 AM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

That turned out to be a rogue boot image on the PXE server.

I've pulled that one off so the only boot images on the server are the original 
32bit., ADK 8.1 production image and the 64bit, ADK1511 development image.  I 
then restarted the WDS service and thought I was home free.

I still get SCCM staging the 64bit ADK 1511 boot image.  The log still 
references the CM1000024 (the rogue boot image).  So I pulled that boot image 
off of all the DPs.  Restarted WDS and tried again but it still staged the boot 
image and still referenced the CM100024 package.



From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Jason Sandys
Sent: Monday, August 8, 2016 11:10 AM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

What is CM100024?

Have you tried updating the boot image on the DP?

J

From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Marable, Mike
Sent: Monday, August 8, 2016 9:48 AM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

Unfortunately is just states that they don't match.

At the start of SMSTS log is shows that it PXE booted from the proper boot 
image:
[cid:image001.png@01D1F1C8.6784E190]


Yet after selecting the development task sequence it just claims that they do 
not match:
[cid:image002.png@01D1F1C8.6784E190]

There's no explanation as to why SCCM felt that they did not match.



From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Jason Sandys
Sent: Monday, August 8, 2016 10:03 AM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] RE: ConfigMgr 1511 PXE Boot Selection

Check smsts.log. It will tell you why it is essentially re-staging the boot 
image. Typically this only happens with media when the version of the boot 
image on the media doesn't match the version on the DP but as note, smsts.log 
should clearly reflect what's going on.

J

From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Marable, Mike
Sent: Sunday, August 7, 2016 9:49 PM
To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com>
Subject: [mssms] ConfigMgr 1511 PXE Boot Selection

I'm trying to sort out what's going on with our PXE server now that we've 
upgraded to 1511 and why it's behaving differently from what I'm reading.

We've recently upgraded our 2012 R2 environment to 1511.  We have not yet 
upgraded to 1602 or 1606.  That is in the works.

First some quick background.  We have a single PXE enabled DP.  On that we have 
the original, production boot image that we've been using for ages.  Let's call 
it "BootImage1".  This image is a 32bit boot image based on ADK 8.1.  It is the 
boot image assigned to our production build task sequence which is advertised 
to "All Systems".

After upgrading to 1511 we began development of a new build and it uses a new 
64bit boot image based on ADK 1511.  Let's call that one "BootImage2".  This 
development build is only advertised to a development collection.

Now, when we PXE boot any production machine SCCM offers up BootImage1 since 
that is the only one available through the deployment to All Systems.  So far, 
so good.

The problem is when we PXE boot one of the machines being used in development 
of the new build.  Since they are members of both the "All Systems" collection 
(with the production build deployed) and the "Development Build" collection 
(with our development build deployed), SCCM has to decide which of the 2 
available boot images to offer.  Since BootImage2 is the most recent, or 
"newest" on the PXE server it is offered.  Again, so far so good.

Now from what I've read, if the boot image that the machine uses matches the 
one that is assigned to the selected task sequence, then the task sequence will 
just start.  Granted what I've found was written for 2007 and 2012.  What we're 
seeing is that even though the machine booted using BootImage2 and we select 
the DEV build (with BootImage2 assigned), SCCM stages BootImage2 and then 
reboots the system.  When the system reboots it then automatically begins the 
selected task sequence.  SCCM ignores what boot image was used to boot the 
system.

It's a bit annoying and I'm sure that once we go production with this new build 
and pull the older BootImage1 out of the environment things will be smooth.  
The bigger problem is that with this new build we are 1) making the switch to 
BitLocker for encryption and 2) now going to support UEFI systems.  Prior to 
the Networking team getting the DHCP options sorted we were booting from USB 
media.  Now when we go to rebuild a BitLockered UEFI machine SCCM attempts to 
stage BootImage2 but the only partition visible is the OS partition, but that 
is encrypted by BitLocker.  Since the partition will not be available to boot 
from then the staging fails.  We have to boot from USB boot media which doesn't 
trigger the boot image staging, or clean the disk of partitions and PXE boot.

I don't understand why SCCM does not recognize that the development machine 
booted from the proper boot image, but instead stages the same boot image and 
reboots?  Has something changed in 1511 and how the PXE boot selection process 
is being handled?  Or is there just something I'm missing or something we may 
have configured wrong?

Thanks

Mike Marable
Microsoft Systems Engineer Lead
Enterprise Device Engineering and Management
MCPS, MCITP, MCTS, MCSA, MCSE, MS  
[Profile<http://www.mycertprofile.com/Profile/5319166625>] 
[Blog<http://thesystemsmonkey.wordpress.com/>]
----------------------------------------------------
"Every great dream begins with a dreamer.  Always remember,  you have within  
you the strength, the patience, and the passion to reach for the stars to 
change the world."
-Harriet Tubman

"The two most important days in your life are the day you are born and the day 
you find out why."
-Mark Twain

"If it was easy everybody would do it."
-Eric Thomas





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