If they are just for storage or very minimal access, NAS is acceptable. If the archives will be utilized heavily, NAS will slow access tremendously and cause latency for client access.This makes me wonder if it's smart to consider putting our Domino data (mail and apps) on the NAS. Is there going to be latency issues there, too?
I would not put production data on Network Attached Storage (NAS). The risks of failure as well as latency are too great. For production data, I would only choose direct attached storage or a Storage Area/Array Network (SAN).