The invention relates to a fluid dynamic bearing system having pressure-generating surface patterns that comprises at least two bearing parts that are rotatable with respect to one another and form a bearing gap filled with bearing fluid between associated bearing surfaces. A data connector system has a first connector portion and a second connector portion. Another method for retrieving files includes: identifying a hash for a given file; using the hash, traversing a hierarchical file structure to find a location where the given file should be stored; determining that the file is at the location; and as a result, retrieving the file. Based on the diagnosis, at least one delta image may be applied to a copy of the primary image to generate an updated primary image at either the network attached storage or the remote storage server.