x86 and x64 WinPE 4.0 dual boot USB - is it possible?

Hello modders,

I'm having a hard time with WinPE 4.0. For starters, my USB is 128GB, which means I have to use exFAT - according to some people, it should work, but others say it won't. So far no luck.

Also, it's my only USB and I really would appreciate a foolproof way to boot both x86 and x64 WinPE 4.0 from it. Even if I have to use separate partitions, that would be fine.

Finally, I have to do this in UEFI mode.... BIOS won't work on the device I'm trying to boot to. Is this even possible?

 

Well how could I have missed that?
Thanks for the tip, I'll try it right away.

 

I'm still having no luck. Are you sure NTFS works with UEFI?

Also, one of Microsoft's suggestions is to create a small partition for WinPE and the remaining space for data, but I can't create more than one partition on this drive. Here's the error I get:

Code:

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> create partition primary size=1000

DiskPart succeeded in creating the specified partition.

DISKPART> create partition primary

No usable free extent could be found. It may be that there is insufficient
free space to create a partition at the specified size and offset. Specify
different size and offset values or don't specify either to create the
maximum sized partition. It may be that the disk is partitioned using the MBR disk
partitioning format and the disk contains either 4 primary partitions, (no
more partitions may be created), or 3 primary partitions and one extended
partition, (only logical drives may be created).

DISKPART>

I've also tried using diskmgmt.msc, as well as Paragon hard disk manager 2010 with no luck at all.

 

Yup it is, and that seems like a limitation that wasn't thought out too well. Am I screwed, or is there a way around it? It's a Corsair Voyager GT 128 GB.

 

Thanks for your help. This is what I have found so far:
The tablet I am working with (Lenovo Tablet 2) absolutely and unequivocally will not support filesystems other than FAT32. I have tried NTFS and exFAT to no avail. It sucks big time, since the only way I can use FAT32 is to format my pen drive with a 32GB partition. I was however able to make the dual boot PE that you linked to earlier, and that does seem to work.

I found some tools that would allow me to add more than one partition to my drive, but only one of those partitions can be visible within windows at any given time. One thing I have not yet tried is whether the invisible partition could be booted from, leaving the visible partition to act as my storage place for images and tools. I am going to try this next.

 

Success!! Using BootIce (hxxp://bootice.narod.ru/), I was able to create a 1GB FAT32 partition and fill the remaining space with an NTFS partition, which doesn't have a file size limitation. I was able to use the tool to set the FAT32 partition to be visible in order to copy the PE files over, and then I used the tool to switch the NTFS partition to be visible. The tablet booted properly even though the FAT32 partition was still hidden and didn't have a drive letter.