There's plenty of info about the process that Voldemort used to create his horcruxes and even more info about how he ultimately used them to return from the dead but a simple question occurred to me;
Prior to Voldemort, is there any canon evidence of what would actually happen to a wizard who died with a horcrux in place? From this, did Voldemort know he would become...
"...less than the meanest ghost"
...and if so, why didn't he plan accordingly (presumably returning to power much more quickly)?
Clearly it would be much more useful to know that when you died, you were going to turn into this sort of spirit; you could probably pre-arrange to have your body restored to you within a week or two. Since Voldemort did not do this, I'm assuming he didn't know would happen to him, but I wanted to know if there was proof either way.
... pain beyond pain, my friends; nothing could have prepared me for it. I was ripped from my body, I was less than spirit, less than the meanest ghost . . . but still, I was alive. What I was, even I do not know . . . I, who have gone further than anybody along the path that leads to immortality." -Harry Potter and the Goblet of Fire, Chapter Thirty-Three (The Death Eaters). Also, the last known Horcruxer was Herpo The Foul (whose Horcrux may still be in existence). – Möoz Jan 26 '15 at 20:41