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Create a bootable USB device for BIOS with MBR partition

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Beginner
Posts: 8
Comments: 9

I think there should be an option to create a bootable USB device for BIOS with MBR partition.

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Legend
Posts: 109
Comments: 28191

saad, all the Acronis bootable rescue media will work with both Legacy / MBR and UEFI / GPT systems, so the option has always been available.

See KB 59877: Acronis True Image: how to distinguish between UEFI and Legacy BIOS boot modes of Acronis Bootable Media

Forum Hero
Posts: 70
Comments: 8346

Typically, Acronis rescue media is determined based on how the USB drive is already initialized and formatted.  When I build rescue media, if I use the advanced option and my USB is already MBR, it will stay MBR.  If it is already GPT, it will stay GPT.

And as Steve pointed out, regardless of how it is initialized, it is capable of booting in UEFI or Legacy mode, but you may have to use your bios one time boot menu to pick the specific method instead of letting the bios pick the one it thinks you should be using based on how it is configured.

Beginner
Posts: 8
Comments: 9

I created an USB drive and it did not work on my system because it has Legacy/MBR BIOS. I used the Rufus program (https://rufus.ie/) to make an USB bootable drive using the MBR partition scheme and Target system BIOS, after which it worked fine.

Forum Hero
Posts: 70
Comments: 8346

saad - tools like Rufus modify the partition layout of the USB flash drives.  If you've used Rufus on the drive before, or another media creation tool, most of the time, wiping the drive and rebuilding it will correct any boot issues with ATI or other products again.

My recommendation, would be to use a Windows elevated command prompt (right click and run as admin) - beware this will wipe any data on the drive!!!!

Then use diskpart

identify the drive # with "list disk"

then 

select disk # (replacing # with the correct #)

clean

That will set it back to factory as un-initialized.  You can then go into windows disk management and initialize the drive as legacy/MBR AND format it as FAT32 (needs to be FAT32).

From there, try to create the rescue media directly in Acronis again, and it should remain MBR and boot on your legacy system.

I have not seen ATI rescue media specifically format a legacy MBR USB to GPT or vice-versa.  It is usually already set that way by the user or a different tool and the rescue media builder should be keeping the default layout of the drive.