Problem :
When I execute : mount /boot/, I have the following :
mount: unknown filesystem type 'ext2'
In my /etc/fstab, I have :
/dev/sda1 /boot ext2 defaults 1 2
Solution :
Add a journal to /dev/sda1 :
tune2fs -O has_journal /dev/sda1
Then modify ext2 en ext3 in /etc/fstab.
/dev/sda1 /boot ext3 defaults 1 2
So, now you can make a mount : mount /boot
Link : Solution