Bug 510558 - MBR 2TB limit and suggest GPT auto-handling for large drives
Summary: MBR 2TB limit and suggest GPT auto-handling for large drives
Status: RESOLVED DOWNSTREAM
Alias: None
Product: isoimagewriter
Classification: Applications
Component: general (other bugs)
Version First Reported In: 25.04.0
Platform: Kubuntu Linux
: NOR major
Target Milestone: ---
Assignee: Jonathan Riddell
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-10-13 08:48 UTC by Matt Parry
Modified: 2025-10-13 09:17 UTC (History)
1 user (show)

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Description Matt Parry 2025-10-13 08:48:22 UTC 
I have a 2.1TB USB stick and using the installed 'Start-up disk creator' on Kubuntu, I am able to create a new startup disk for either 25.04.and 25.10, however upon trying to boot from the USB, I receive several errors - (Startup disk creator - does not allow me to see the version of the software that I am using, however I am using Kubuntu 25.04)

Error file to found. Error invalid magic number. Error you need to load the kernel first. Press any key to continue.

I have tried using the Gnome equivalent, however this also fails, finally I tried ventoy - however this fails during the installation - I had to change boot style to GPT rather then MBR and also allocate 500GB at the end of the disk to successfully install.

Working this through with Grok - it suggests that I file a bug to suggest GPT auto-handling for large drives.

Thanks
Comment 1 Harald Sitter 2025-10-13 09:17:21 UTC 
Startup disk creator is not kde software. Best get in touch with kubuntu.