# Want to create btrfs top level 5 subvolume in an already installed system

**URL:** <https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712>\
**Category:** Newbie\
**Created:** [July 25, 2023, 1:41pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712 "2023-07-25T13:41:24Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![kraker](https://forum.endeavouros.com/letter_avatar_proxy/v4/letter/k/a87d85/32.png) [@kraker](https://forum.endeavouros.com/u/kraker)\
**Post date:** [July 25, 2023, 1:41pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/1 "2023-07-25T13:41:24Z")

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Well as the title says. I want to create a top level 5 btrfs subvolume without having to use a live usb to do that. Is there any way to do it?  
Edit: The btrfs partition is mounted at “/”

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**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\
**Post date:** [July 25, 2023, 1:43pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/2 "2023-07-25T13:43:25Z")

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Sure.

```plaintext
sudo mkdir /mnt/btrfsroot
sudo mount /dev/mybtrfsdevice /mnt/btrfsroot -o subvolid=5
sudo btrfs subvolume create /mnt/btrfsroot/mysubvolname

```

Replace `/dev/mybtrfsdevice` with your actual device. i.e. /dev/sda2

Replace “mysubvolume” with whatever you want the toplevel subvolume to be named.

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<div class="post-metadata">

**Author:** ![kraker](https://forum.endeavouros.com/letter_avatar_proxy/v4/letter/k/a87d85/32.png) [@kraker](https://forum.endeavouros.com/u/kraker)\
**Post date:** [July 25, 2023, 1:44pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/3 "2023-07-25T13:44:17Z")

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The problem is that the btrfs partition is mounted already at /

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<div class="post-metadata">

**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\
**Post date:** [July 25, 2023, 1:45pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/4 "2023-07-25T13:45:07Z")

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> [@kraker](#):
>
> The problem is that the btrfs partition is mounted already at /

That doesn’t matter. It can be mounted more than once.

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<div class="post-metadata">

**Author:** ![kraker](https://forum.endeavouros.com/letter_avatar_proxy/v4/letter/k/a87d85/32.png) [@kraker](https://forum.endeavouros.com/u/kraker)\
**Post date:** [July 25, 2023, 1:46pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/5 "2023-07-25T13:46:35Z")

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Thanks, I didn’t know that. Can other file systems be mounted more than once too like ext4 etc

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<div class="post-metadata">

**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\
**Post date:** [July 25, 2023, 1:47pm UTC](https://forum.endeavouros.com/t/want-to-create-btrfs-top-level-5-subvolume-in-an-already-installed-system/43712/6 "2023-07-25T13:47:11Z")

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> [@kraker](#):
>
> Can other file systems be mounted more than once too like ext4 etc

Yes. Although, I haven’t tested every single one. 😅