Hrm.

For the 4TB disk in the same system (which has been working for years), fdisk -l reports:

Disk /dev/sdc: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 88C7DF91-CD80-4EEB-AC6B-110119B04DD4

Device Start End Sectors Size Type
/dev/sdc1 2048 7814035455 7814033408 3.7T Linux filesystem

Wondering if that helps. Starting to wonder if it's the firmware on the USB external chassis.

On Sun, 29 Dec 2019 at 00:42, Nicholas Krause <xerofoify@gmail.com> wrote:

On 12/29/19 12:19 AM, Evan Leibovitch wrote:

On Sun, 29 Dec 2019 at 00:08, Nicholas Krause <xerofoify@gmail.com> wrote:

Your using fdisk right. There is a version for GPT disks called gdisk and you may want to try
that or a GUI program like gparted.

Tried that. gdisk also reports 2TB and refuses to create any partition larger than that.

- Evan

While its stating that you have a sector size of 512 bytes which is odd. Most gpt drives should
be 4096bytes per sector, I just double checked. So even if its gpt it may be doing it based on
issues with other things, not sure if the computer or device your using at a firmware level
supports 4K sectors but it seems maybe that should be checked. Its a common problem
with larger drives, I've never run into it as the systems I have are almost all UEFI or later.

Nick