A good starting point is the Health Sciences Records and Archives Association’s “Guide to the Archiving of Electronic Records” (currently in review) and “GCP Archiving Guide”. Both are free to download from the Health Sciences Records and Archives Association website on the Resources / Publications page. I tried posting replies with hyperlinks but with no success: sorry! Hope that helps though.
In response to Jamie’s post, Iron Mountain offers a digital storage solution only not a digital archiving solution. For a bona fide digital archive solution, try Arkivum, Formpipe, or Preservica.