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Date: Wed, 15 Jul 2015 21:16:08 -0500
From: Dutch Ingraham <stoa@gmx.us>
To: freebsd-questions@freebsd.org
Subject: Re: Ext4 Kernel Panic
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On Thu, Jul 16, 2015 at 12:08:35AM +0000, Kyle wrote:
> 
> So I mount an ext4 partition like so:
> 
> # mount -r -t ext2fs /dev/ada2p1 /mnt
> 
> And then I try to copy some files. This consistently results in a kernel
> panic.

As I understand it, once the kernel module is manually loaded, the ext2fs(5) 
driver will allow reads from and writes to an ext2 filesystem, but will 
only support reads of an ext4 filesystem.