tune2fs -c 1000
rid stop
reboot
# into 2.4 or 2.6?
#at reboot in grub: single user mode (select kernel, press "e", select kernel line, press "e", append "single" at the end of the line, "enter", press "b", root password)
		   mount -o ro,remount /dev/sda1 

e2fsck -c -y /dev/sda1

#according to the man page: 
#   Note  that  in general it is not safe to run e2fsck on mounted filesys-
#   tems.  The only exception is if the -n option is specified, and -c, -l,
#   or  -L  options  are not specified.   However, even if it is safe to do
#   so, the results printed by e2fsck are not valid if  the  filesystem  is
#   mounted.    If e2fsck asks whether or not you should check a filesystem
#   which is mounted, the only correct answer is "no".  Only experts  who
#   really know what they are doing should consider answering this question
#   in any other way.
#I am no expert, in fact, I hardly understand what I am supposed to do here, 
#are you sure you want to do this?

# this takes a few hours.
# what if something is wrong?

reboot

#single user again

rsync -va --exclude /vol --exclude /proc --exclude /sys / /vol

grub-install --directory /vol/boot/grub /dev/sdb1

# do you mean 
#grub-install --root-directory=/vol/boot/grub /dev/sdb1
# this is how I would understand it from the man page on nebka.
# and why not use update-grub?


#sdb1, not sdb, right?

#edit /vol/etc/fstab putting the right device for the swap, but how? And I suppose that file will be rsynched from /etc/fstab, right?

reboot 

# normal user (same a above, remove "single")