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Thread: Change md0 dos to gpt partition table Ask Question

  1. #1
    Join Date
    Feb 2008

    Change md0 dos to gpt partition table Ask Question

    On a kde neon system, I had a drive failure of one drive on an mdadm two drive (non-boot) RAID1 mirrored array. After some trials and tribulations, I managed to replace the failed drive with an identical new drive and resync successfully.

    The RAID1 mirrors two 4GB drives, both with GPT partition tables, but for some reason if I run $sudo fdisk /dev/md0 I now get the warning: "The size of this disk is 3.7 TiB (4000650690560 bytes). DOS partition table format cannot be used on drives for volumes larger than 2199023255040 bytes for 512-byte sectors. Use GUID partition table format (GPT)."

    Is it possible to convert the md0 array from dos to gpt partition table without losing data? What are the steps/commands to do so?

  2. #2
    Join Date
    Jun 2006
    Ubuntu 20.04 Focal Fossa

    Re: Change md0 dos to gpt partition table Ask Question

    Thread moved to Ubuntu/Debian Based sub-forum.
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