In this question on Super User they say that Solid-State Drives (SSDs) use much less power than traditional Hard Disk Drives (HDDs). I read some internet posts and research articles that backup this claim, although some people say the difference is less than you expect.
My question is: does this mean that overall SSDs have a lower environmental impact over their entire lifespan (so including manufacturing and disposal)? Have there been any scientific studies on this?
With environmental impact I mean the aspects that are generally part of a life-cycle analysis so energy use, water use, GHG emissions, use of rare earth metal and toxicity. Preferably all aspects relevant for disk drives, but if there's only data on a single aspect like carbon footprint I'm interested as well.