IMac has lost recovery HD
When I tried to access the recovery HD upon startup (pressing command-R) the recovery HD option did not show. When trying to download recovery assistant, message came up saying "The recovery HD on this computer is not present", which confirms its absence.
Should I re-install OS X 10.8.5 to get the recovery HD back on my computer?
iMac, OS X Mountain Lion, late 2007 model