On the subject of recommended drives for NAS purposes, I would strongly recommend
against buying any product from Western Digital if you intend to use it for Time Machine backups.
After being caught napping by Lion, which broke my WD Sharespace's ability to be a destination for Time Machine backups, they took 3 or 4 months to fix the issue (with a firmware update). From what I understand, that was on Apple who changed the way Time Machine interacts with NAS drives without telling anyone. Regardless, WD's slow response was irritating.
Well, Mountain Lion did it again. I don't know why it's broken again, but I'm going with the "fool me once" principle to put this one on WD. It's been over 4 months since ML was released, and many more months since developer versions had been available. WD walked straight into the same bear trap again, and I have not been able to backup, nor access my existing backups, since upgrading to ML.
The icing on this crap cake is responses like this from their tech support:
We sincerely apologize for the inconvenience, we will be more than glad to assist you with this issue. Unfortunately we do not have information on what will be changed or a release date for an upgraded firmware. You may wish to join, and add to our Community Forums' Ideas Lab at the link below. Our development team reviews these posts on a regular basis, to see the most commonly requested features by our customers.
This was 4 days ago. They
still have no idea if/when/how this will get fixed.