Mount LVM partitions in FreeBSD

I’ve been playing around with helloSystem, an up and coming FreeBSD desktop environment that mirrors the MacOS experience quite well. Since it’s based in FreeBSD I’ve had to brush up on a few FreeBSD-isms that are distinctly different from Linux.

Since I’m dual booting this helloSystem BSD system alongside my Arch Linux install, I want to be able to access files on my Arch system from the BSD system. My Arch system uses LVM, which posed a challenge as LVM is a distinctly Linux thing.

To get it to work I needed to load a couple modules (thanks to the FreeBSD forums for help)

  • fuse
  • geom_linux_lvm

You can do this at runtime by using the kldload command

kldload fuse
kldload /boot/kernel/geom_linux_lvm.ko

To make the kernel module loading survive a reboot, add them to /boot/loader.conf

geom_linux_lvm_load="YES"
fuse_load="YES"

You can now scan your BSD system for LVM partitions:

geom linux_lvm list

The LVM partitions are listed under /dev/linux_lvm. The last step is to mount them with FUSE:

fuse-ext2 -o rw+ /dev/linux_lvm/NAME_OF_LVM_PARTITION /mnt/DESIRED_MOUNT_FOLDER

rw+ indicates a read/write mount.

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