FreeBSD Mounting drive with ext4 file system

Mounting a disk with ext4 file system in FreeBSD


When I switched from GNU/Linux to FreeBSD I had several disks on one of them I installed FreeBSD, but GNU/Linux with all the data did not kill ... After installing and configuring FreeBSD, I needed to transfer all the data to the installed system. I turned off my computer, connected a disk with GNU/Linux, booted from FreeBSD and ran the command in the terminal:


# mount /dev/da0s1/mnt


what am I doing saw this error message


mount: /dev/da0s1: Invalid argument


I decided to try this:


# mount -t ext4 /dev/da0s1/mnt


and then an error


mount: /dev/da0s1: Operation not supported by device

But the data had to be retrieved somehow. Then I looked at my disks with these commands:


# dmesg | grep da0


# gpart show da0


The disks were detected normally


My next step is to allow a regular user to mount devices.


I edited the /etc/devfs.rules file so that users in the operator group have read and write permissions, like this:


# ee / etc / devfs. rules

[localrules = 5] add path 'da *' mode 0660 group operator


Now edit /etc/rc.conf to allow devfs.rules ruleset:

# ee /etc/rc.conf


# ee /etc/rc.conf


# ee /etc/rc.conf

Edit the /etc/sysctl.conf file as follows:


# ee /etc/sysctl.conf






# sysctl vfs.usermount = 1 vfs.usermount: 0 → 1


Create a directory for example linux like I did or anyone else:


# mkdir /mnt/linux

And specify the owner and group


# chown user: user /mnt/linux


Where user is your user and his group


After I tried to mount the disk and again the error


$ mount -t ext4 /dev/da0s1/mnt/linux


mount: /dev/da0s1: Invalid argument


But now the error is not forbidden, but an inaccessible argument means that FreeBSD does not support ext4 filesystem.


We need to set the fusefs port-ext4fuse


# cd /usr/ports/sysutils/fusefs-ext4fuse


# make install clean


When fusefs-ext4fuse installed I tried to mount the disk again


$ ext4fuse /dev/da0s1/mnt/linux


fuse: failed to open fuse device: No such file or directory


and again trouble

Googling I found that there is a fuse module in the kernel, load the fuse.ko module


# kldload fuse.ko


Edit we have /boot/loader.conf to load the module on each load


# ee /boot/loader.conf


Then I tried to mount the disk:


$ ext4fuse /dev/da0s1/mnt/linux


everything went without errors and I decided to see the contents directory like this


$ ls /mnt/linux


and saw that everything works!