Oh, wow thanks. I will try that.
Thanks,
Ben
ben79
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OM-QA Team
On 10/28/2014 12:23 PM, Konstantin Vlasov wrote:
Re[2]: [OM Cooker] How to partition for dual boot Windows 8.1/OM Lx
2014.1 on UEFI computer. Hi, Ben.
My apologies, I completely forgot about one very important aspect of
all this UEFI+Windows business: the bootloader rely on the GPT
partition GUIDs which were regenerated from scratch when GPT was restored.
I believe it's still possible to restore the required GUIDs and make
Windows boot without reinstalling it.
Please, download the ROSA KDE R4 64-bit iso (maybe, OM will also
suffice but with ROSA I just know for sure what works and what
doesn't), write it on a USB flash drive and boot Live mode from it in
UEFI mode (this is important: when booting in UEFI you will see Grub
menu with nice theme, ROSA logo, etc. - if, instead, you are seeing
text-mode menu with Troubleshooting submenu, it's syslinux, and the
scenario below won't work).
After you booted, open Konsole and run:
# efibootmgr -v
The output should contain one or more Windows entries which look like
that:
Boot000D* Windows Boot Manager
HD(2,1f4800,82000,694f0dc5-0502-4bbb-8a2f-d07fc767c2d0)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...3.............^?...
What you need here is the GUID in the HD(...) parameters - in my
example it's "694f0dc5-0502-4bbb-8a2f-d07fc767c2d0". Now start `gdisk
/dev/sda' and assign this GUID to your EFI partition (x, c). After
saving the partition table try to reboot into Windows: the bootloader
should be able to start, and hopefully it will initiate restoring the
rest of the Windows partitioning metadata.
OK, results:
# gdisk /dev/sda
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
I believe that's what I need. Windows 8.1 OS is still there but won't
boot which I expected. So I'm going to need to reinstall 'dows 8.1
again, which I expected. However my ding dong computer did not come
with a reinstalll disk. So I hope I can get that from either ASUS
(ASUS X550CA notebook) or the beloved ones at Microsoft. I will be
very surprised if that doesn't cost me some $. Ok take one for the team.
Konstantin this is important because Colin Close and I are trying to
dial in OpenMandriva support for efi/uefi and also multibooting with
Windows. Your help has been invaluable. Any more input will be much
appreciated. We seem to have much in front of us.
Colin: unless and untill I have the wherewithall or whatever to
reinstall Windows 8.1 we're paused. I will work on that as time
allows. The positive side is I'm learning a lot about 'dows and how to
munipilate it and gdisk and other stuff that may lead to
incontrovertible results. And that, to me, is the goal. So I am forced
to learn more about the windows side of these issues as well as
learning the GPT (gdisk is to GPT as fdisk is to MBR) stuff, the UEFI
stuff, and so forth. I have a lot of aforementioned man pages
bookmarked for study...
Obviously I'm dealing with a major learning curve. Any one out there
help me if you can. I darn sure need it.
Thanks,
Ben
ben79
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OM-QA Team
/--
Bye. With best regards,
Konstantin Vlasov. /
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