This article is from the storage FAQ part2, by Rodney D. Van Meter with numerous contributions by others.
From E-Systems. Works with the E-Systems ER-90 (D-2) tape drive and Odetics robots, as well as 3480 with the Storage Tek ACS 4400. Runs on Convexes (only?). Supports multiple copies of files. Retrieves only necessary info from tape to disk before completing request. Reportedly no longer available on Convex, in beta test on SGI (email@example.com, 10/95) Now owned by EMASS, info at http://www.emass.com/Products/Software_Products/FileServ/FileServ_Top.html.