Bug 510558

Summary:	MBR 2TB limit and suggest GPT auto-handling for large drives
Product:	[Applications] isoimagewriter	Reporter:	Matt Parry <mattparry.nz>
Component:	general	Assignee:	Jonathan Riddell <jr>
Status:	RESOLVED DOWNSTREAM
Severity:	major	CC:	sitter
Priority:	NOR
Version First Reported In:	25.04.0
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

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.