On 12/29/19 12:48 AM, Evan Leibovitch wrote:
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.
Maybe as those numbers look better on the physical side. Try seeing if connecting it directly to a open SATA port and see if that gets you 512 bytes for logical and 4096 for physical. I've suspecting that may be it based on the internal drive you proved sector size numbers.

Nick


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



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


    On Sun, 29 Dec 2019 at 00:08, Nicholas Krause
    <xerofo...@gmail.com <mailto:xerofo...@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



--
Evan Leibovitch, Toronto Canada
@evanleibovitch or @el56

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