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I'm trying to install Arch Linux on a disk which was previously partitioned. The Disklabel type is automatically set to gpt. I need to change it to dos. How can I do it?

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    are you sure you need to change it to a DOS label? there's several advantages to using GPT.
    – Pedro
    Commented Jun 18, 2020 at 16:08

2 Answers 2

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I've never actually used cfdisk, but I can tell you how to do it with fdisk.

  1. Run fdisk -l
  2. You should get all of your storage devices.
  3. Find the one you want to partition.
  4. It should be something like /dev/nvme0n1 or /dev/sda but your knowledge may vary.
  5. Once you find it run fdisk <name of drive>. E.x. /fdsik /dev/sda
  6. You should now see something like this
Welcome to fdisk (util-linux 2.35.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): 

Typing m reveals:

o create a new empty DOS partition table

Notes:

  • Know that changing the labels will delete everything.

  • Don't forget to run w before exiting to write table to disk.

  • Check the Arch Wiki for more information.

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According to this cfdisk manual:

If you want to remove an old partition table from a device, use wipefs(8).

So when I had this issue I used wipefs -a <drive here> and then proceeded with cfdisk as normal.

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