10. A method comprising: multi-dimensional indexing of a file being archived to secondary storage in an information management system, by a multi-dimensional indexer, wherein the file being archived is stored in primary storage which is in communication with a user computing device, and wherein the multi-dimensional indexing comprises: (a) generating a file attribute index, which includes extrinsic information about the file being archived that is independent of contents of the file, and (b) generating a content index based on at least one of: text content, picture content, video content, and audio content of the file being archived; archiving the file to secondary storage, by a media agent component of the information management system, wherein the file archiving includes dividing the file into a plurality of independently accessible smaller portions of an archive copy of the file being archived, and wherein each independently accessible smaller portion in the plurality of independently accessible smaller portions of the archive copy is identified at least once in at least one of the file attribute index and the content index; providing to a user of the information management system a fast-forward progression through the plurality of the independently accessible smaller portions of the archive copy without restoring from the secondary storage each independently accessible smaller portion, wherein the fast-forward progression is based on searching at least one of the file attribute index and the content index; restoring a first independently accessible smaller portion of the archive copy to the primary storage in communication with the user computing device, without also restoring from the secondary storage the other independently accessible smaller portions in the plurality of independently accessible smaller portions of the archive copy; and wherein the multi-dimensional indexer executes as computer-executable instructions on a hardware processor coupled to non-transitory computer memory storing the instructions.
19. The method of claim 10 further comprising: providing the user of the information management system with a search utility for searching the secondary storage based on the multi-dimensional indexing; and wherein the restoring comprises mounting to the primary storage only such independently accessible smaller portions of the archive copy that satisfy search criteria supplied by the user and applied by the search utility.