The recommended method to convert these disks is to upgrade the operating system to Windows 10 first, then perform the MBR to GPT conversion. So 2k8 sounds like a no no even for an offline conversion.

With Microsoft ending Windows 10 updates on October 14, 2025, millions of users must upgrade to Windows 11. This operating ...

There are some partitions on your hard disk. Before converting your hard disk from MBR to GPT, you should delete all the partitions. Your BIOS mode is set to legacy mode.

Turns out by default Linux (RHEL8) is still using MBR disks and so you run into the 2TB max limit. Found that there is a command "sgdisk" that will do a live conversion to GPT without any data loss.

As a leading provider of data recovery, file backup, and disk management solutions, EaseUS has observed that an increasing number of PC users encounter errors such as "Secure Boot is not enabled" or ...