I'm tring to implement Flashcache for a root particion for an ubuntu box. There is an excellent doc how to do this in flashcache:
My problem is at this line:
Edit your /etc/fstab and /boot/grub/grub.cfg to change the root device to the flashcache device you intend to use
I'm not familiar with
grub.cfg, how should I edit it?
I can do the