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Using Facebook's Flashcache on root particion (/)

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linux-howto

http://serverfault.com – 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: https://github.com/facebook/flashcache/blob/master/README-DKMS 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 fstab part. (HowTos)