Unable to create multiple Win10 instances on external SSD

Winclone
1

I followed the instructions in one of the forum messages to setup my external SSD with proper partition scheme. I have created a backup of Win10 using Winclone 9. Currently running MacOS Big Sur, and I have the following hardware:

Drive enclosure: Shell Thunder - Designed for Thunderbolt 3 SSD Enclosure – Fledging

Memory: Silicon Power 2TB NVMe PCIe Gen4x4 US70 M.2 2280 SSD

I’m able to restore to the external SSD and boot just fine.

However, as soon as I add a second instance to my external SSD, the second instance does not boot. I get error code: 0xc0000001.

Is it not possible to run multiple boot camp instances on an external SSD?

Thanks!

2

We don’t have any instructions written up for it and I have not tried it myself. You may have to have a custom EFI boot record. If you can boot to one instance, try and modify the boot settings in Windows and see if you can specify the other installation of Windows.

1 Like
3

This is the guide I followed. I assumed that running multiple Win10 instances on the same external SSD was one of the scenarios as listed here: * Run multiple bootable Windows 10 partitions on external drive attached to Intel Mac

I created 2 ExFat partitions and continued from there. Is that not supported?

4

You can restore Windows to multiple partitions, then boot to latest copy of Windows, and add other copies to boot menu using bcdboot or bcdedit