[ipxe-devel] WinPE 5.0 wimboot errors?

[Brian Rak]

Very old thread.  Has anyone successfully managed to boot server 2012R2 
(or Windows 8.1)?

Looks like no, http://forum.ipxe.org/showthread.php?tid=7074

A very dumb comparison of bootmgr shows there's significant changes, I 
wonder if those are related to booting the OS properly.

I'm going to continue to investigate, but I don't see any alternative 
source for bootmgr.exe (WinPE no longer contains a PXE directory, and I 
don't see any extracted bootmgr files anywhere)



On 10/10/2013 8:50 PM, Brian Rak wrote:
> Not a bad idea, while it gets me past the bootmgr issue, the OS still 
> doesn't boot correctly.  I'm seeing the same error as this forum post: 
> http://forum.ipxe.org/showthread.php?tid=6967
>
> I'm not entirely certain if this is an issue with iPXE or not. I'm not 
> really sure how I could tell either.
>
> On 10/10/2013 8:21 PM, Andrew Bobulsky wrote:
>> On Oct 10, 2013, at 5:48 PM, Brian Rak <brak at gameservers.com> wrote:
>>
>>> I'm attempting to boot a WinPE 5.0 image (from the ADK for Windows 
>>> 8.1 preview: 
>>> http://www.microsoft.com/en-us/download/details.aspx?id=39306 ), and 
>>> I'm running into some issues.  It seems that wimboot is no longer 
>>> able to load bootmgr.exe:
>>>
>>> https://dl.dropboxusercontent.com/u/2078961/wimboot.png
>>>
>>> If I compare the old wimboot file (from WinPE 4.0) to the new one, 
>>> what I'm assuming to bootmgr.exe seems to be in the same place:
>>>
>>> 00006880  53 20 20 20 25 78 0a 00  4c 64 74 20 20 25 78 0a  |S 
>>> %x..Ldt  %x.|
>>> 00006890  00 00 00 00 00 00 00 07  25 6c 78 0a 00 00 00 00 
>>> |........%lx.....|
>>> 000068a0  42 4d 58 48 1c f6 05 00  08 a3 0a 00 10 20 00 00 
>>> |BMXH......... ..|
>>> 000068b0  4d 5a 90 00 03 00 00 00  04 00 00 00 ff ff 00 00 
>>> |MZ..............|
>>> 000068c0  b8 00 00 00 00 00 00 00  40 00 00 00 00 00 00 00 
>>> |........ at .......|
>>> 000068d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
>>> |................|
>>> 000068e0  00 00 00 00 00 00 00 00  00 00 00 00 e8 00 00 00 
>>> |................|
>>> 000068f0  0e 1f ba 0e 00 b4 09 cd  21 b8 01 4c cd 21 54 68 
>>> |........!..L.!Th|
>>> 00006900  69 73 20 70 72 6f 67 72  61 6d 20 63 61 6e 6e 6f |is 
>>> program canno|
>>> 00006910  74 20 62 65 20 72 75 6e  20 69 6e 20 44 4f 53 20  |t be 
>>> run in DOS |
>>> 00006920  6d 6f 64 65 2e 0d 0d 0a  24 00 00 00 00 00 00 00 
>>> |mode....$.......|
>>>
>>>
>>> I'm not certain what the error messages mean, has the bootmgr format 
>>> changed significantly?
>>>
>>> WinPE 5.0 apparently fixes a terrible bug in WinPE 4 ( 
>>> http://support.microsoft.com/kb/2853726 ), so I was hoping to be 
>>> able to use it even though it's not officially released.
>> Hello Brian,
>>
>> After eyeballing both your screenshot and the Microsoft KB, there's no
>> specific mention of anything bootmgr related... Can you just extract
>> the bootmgr from a WinPE 4 ISO and use that instead?
>>
>> Bootmgr--much to our chagrin--hasn't exactly changed a whole lot in
>> the last six years... The one included in WinPE 4 should likely work
>> for booting WinPE 5.
>>
>> Should!  :)
>>
>> Cheers,
>> Andrew Bobulsky
>
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