On Sun, Dec 4, 2011 at 18:22, loody <miloody@gmail.com> wrote:> Dear all:> Is there any document which explain what "backing device" used for?such as "backing block device" in caching?-- regards,Mulyadi SantosaFreelance Linux trainer and consultantblog: the-hydra.blogspot.comtraining: mulyaditraining.blogspot.com