1. A method for deduplication in a hybrid storage environment comprising disk and redundant array identification disk (RAID) storage systems, the method comprising: determining characteristics of a first data set via a computer processor, the first data set is identified as redundant to a second data set, the second data set stored in a first storage system, and the first data set is not stored; mapping the characteristics of the first data set to storage preferences, the storage preferences specifying selections of storage systems that include the first storage system and a second storage system, the storage systems configured for storing data sets based upon attributes of the storage systems; and storing, as a persistent data set, one of the first data set and the second data set in one of the storage systems identified from the mapping, the storing including: upon determining that the first storage system embodies a preferred disk technology from results of the mapping, maintaining storage of the second data set in the first storage system as the persistent data set and ignoring the first data set; and upon determining that a second storage system of the storage systems embodies the preferred disk technology from results of the mapping, storing the first data set in the second storage system as the persistent data set and clearing the second data set from the first storage system.