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Bumbastik

WinPe 4 uefi mode on usb key

15 posts in this topic

Hi Guys ,

i have a quick question for you ...Is possible create a bootable usbkey with WinPe4 IN UEFI mode ?

I'm trying to search this info but without success .

Thanks so much in advance for your input .

BRs

AnyB.

Edited by Bumbastik
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Bumbastik, I do not know about WinPE 4.0 but I have created a 3.0 USB stick (nothing special done) that I can boot in both old BIOS mode and UEFI mode. I use it to start a flat install (from HDD). UEFI mode allows the creation of a GPT formatted disk. Enjoy, John.

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Hi Johnhc ,

thanks so much for you prompt answer ,

My question is a bit different , I'm trying to build an usbkey ( fat\fat32) with uefi structure and WinPe4

BRs

Bumbastik

Edited by Bumbastik
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Bumbastik, sorry, I do not know what a "uefi structure" is, so I cannot help you. Enjoy, John.

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My question is a bit different , I'm trying to build an usbkey ( fat\fat32) with uefi structure and WinPe4

I'm not sure you can boot a FAT32 volume in UEFI mode.

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build an usbkey ( fat\fat32) with uefi structure and WinPe4

It's supported by default. Copy and paste files to usb key.

Especial

copy "Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\Media\EFI\Boot\bootx64.efi" <usb:>\EFI\Boot\bootx64.efi

Walkthrough: Boot Windows PE from a UEFI-based Hard Disk

Edited by cdob
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Tripredacus, as I stated above, I can boot my WinPE 3.0 in legacy or UEFI BIOS. I just checked again and the USB stick is FAT32. Enjoy, John.

EDIT: Bumbastik, In my comments above I am discussing results with 64 bit WinPE 3.0. I also have a 32 bit USB stick and it will not boot in UEFI mode.

Edited by johnhc
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Hi Guys ,

i made progress ....

@ Tripredacus

boot from fat /fat32 should be a UEFI spec /requirement

@ Johnhc

Probably i found the solution but i need to test my usbkey and if work fine i will post here the steps for other guys

Bye

AnyB .

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@ Tripredacus

boot from fat /fat32 should be a UEFI spec /requirement

Should be, but won't. Spec only supports 64bit capable "things." But... that's just official support. No one can say it won't work which in this case it sounds like it does.

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Hello ,

i will try and we will clarify all dubts ...as usual :)

Official info should be file system fat or fat32 and WinPe x64 version

Bye

AnyB

Edited by Bumbastik
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Hello Guys ,

all the specs are confirmed

UsbKey -> Fat32 +WinPe 4 x64 -> Works fine

UsbKey -> Fat32 +WinPe 4 x32-> Doesn't work

UsbKey -> NTFS +WinPe 4 x32-> Doesn't work

UsbKey -> NTFS +WinPe 4 x64-> Doesn't work

How to build WinPe 4 Uefi mode

- start with admin privilege DandISetEnv.bat

- run copype.cmd amdx64 x\yourforlder

- mount -> customize and commit your boot.wim present inside media/sources/boot.wim

- copy ALL the content of the media folder on the root of your usb key Fat 32

That 's all ...enjoy

BRs

AnyB.

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Found this here:

Booting X86 WINPE 4.0 requires that the UEFI be at least 2.3.1.
The question then becomes, how to determine if your BIOS is UEFI 2.3.1 compliant? I suspect most current ones are not since this UEFI specification was released in June 2012. In the WinPE 4.0 files is MakeWinPEMedia.cmd which formats and copies the necesdsary files to the USB stick (/ufd switch). It formats the stick in FAT32 format using DiskPart. Enjoy, John.
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Hello ,

yes right ..


echo format fs=fat32 label="WinPE" quick >> "%DISKPARTSCRIPT%"

Bye

AnyB

Edited by Bumbastik
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Found this here:

Booting X86 WINPE 4.0 requires that the UEFI be at least 2.3.1.
The question then becomes, how to determine if your BIOS is UEFI 2.3.1 compliant? I suspect most current ones are not since this UEFI specification was released in June 2012.

UEFI 2.3.1 started showing up early this year, nevermind the publish date on that document. There are a few ways I have found so far.

1. In the BIOS, there is an option to enable UEFI boot

2. The motherboard spec sheet mentions support for "Fast Boot"

All Intel boards (look at board rev/AA number) on this list have it:

http://www.intel.com/support/motherboards/desktop/sb/CS-033076.htm

Note the exceptions below. Anything newer from Intel have it, such as X79, 77 chipsets, but some of their "embedded" type systems, do not have it such as the D2700MUD. You'd have to look at the ProductSpec PDFs to find this info.

Other ones its tough. All the new Compal, Pegatron and ASI notebooks/Ultrabooks have it, as do the A75 MSI AMD boards, but this information is even harder to find. The only reason I know those is because I've gotten in the habit of asking.

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Unfortunately it does only work on fat/fat32. I have tested exFat but this doesn't work, too.

So my install.wim file can't be greater than 4 GB due to FAT32 limitation :wacko:

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