On Fri, Sep 19, 2025 at 06:31:18PM +0000, H. Hartzer wrote: > BIOS generally seems to have a 2TB drive limit for a boot disk.
Are you referring to the 2 Tb limit of what can be defined as an MBR fdisk partition? If so, this doesn't affect the size and location of disklabel partitions. It's perfectly possible to create an MBR fdisk partition for OpenBSD that spans the first 2 Tb, then within disklabel change the bounds of the OpenBSD area to be the whole disk. Then you can create whatever disklabel partitions you like across the whole device, using the full capacity. Even If the BIOS did happen to have an arbitrarily low limit on the highest sector that it can read, it's unlikely to be a problem for a system that only boots OpenBSD, because the boot code and the root partition are usually contained within the first few gigabytes anyway. In other words - it's not necessary to use UEFI booting and GPT to make use of a disk larger than 2 Tb.
