u/Legal_Honey_6249

Trying to migrate a Windows Server 2016 system from a hardware RAID (MegaRAID 9361-8i, RAID 0) to a single disk using Acronis True Image 2021.

Backup was created successfully (.tibx), and restore completes without errors. However, the system consistently fails to boot afterward with INACCESSIBLE_BOOT_DEVICE.

What I've already tried:

• Acronis Universal Restore (no success)
• Forcing generic storage drivers (storahci / pciide)
• Rebuilding BCD and marking partition active
• Testing in a VM (Hyper-V Gen1, IDE)

The source system is a Dell Precision T7820 using an Avago MegaRAID controller.

My assumption is that the issue is related to storage driver transition from hardware RAID to standard disk, but I haven’t been able to fully detach the system from the RAID dependency.

Has anyone successfully migrated a system like this? Any insight into what might still be binding the OS to the RAID controller?