On Sun, May 23, 2021 at 11:25 AM Marco Guazzone <marco.guazzone@xxxxxxxxx> wrote: > > Hello, > > I have just done a fresh installation of Fedora 34 on a new computer and used the automatic disk partitioning proposed by the installer. > Now my disk has the following layout: > - /boot (ext4) > - /boot/efi (EFI system partition) > - / (btrfs), with two subvolumes: @root and @home. > > In case of a new fresh installation of Fedora, I would like to preserve the @home subvolume only and instead overwrite the rest. However, I am not sure what I should do (note, I don't want to use dnf upgrade). > > Just as an experiment, I tried to simulate a fresh (re)installation of Fedora 34 and I selected "Custom" as the disk partitioning method. The installer showed the above disk layout. So, my idea was to use the same approach I used in the past (with ext4 partitions). Specifically: > * For the "/boot" and "/boot/efi" partitions, I specified "/boot" and "/boot/efi" as mount points, respectively, and flagged the "Reformat" checkbox. > * For the "/home" subvolume, I specified "/home" as the mount point, without flagging the "Reformat" checkbox. > * For "/", I cannot tell the installer to reformat it. I am not sure what to do. I would create a new btrfs filesystem with "/" as the mount point, but I am not sure it is correct. > > Do you have any suggestions? There's definitely a trick. The installer normally enforces reformatting a partition/LV for sysroot. Btrfs gets an exception by merely enforcing creation of a new subvolume on an existing Btrfs file system for sysroot. The way to do that is to create a new / mount point rather than clicking on an existing one; also helpful is to not specify a size for this mount point, just leave that 2nd field empty. There is a test case that describes this in detail and hopefully someone will turn it into a quickdoc. (It's on my to do list but I'm not sure when I'm going to get around to it. https://fedoraproject.org/wiki/QA:Testcase_partitioning_custom_btrfs_preserve_home -- Chris Murphy _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
