evaluation-guide/advanced-storage: add a picutre to show the result of assigning disk

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
evaluation-guide/advanced-storage: finsih mark disk shareable

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
all: use space instead of tab to align

I (maybe you) hate tab!!!, so I write this line to my .emacs file:
(setq-default indent-tabs-mode nil)

this change should be wrote to our CODING_STYLE.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>