The High Capacity Storage System (HCSS) is a utility that extends the storage capacity of a NetWare® server by integrating an optical disk library, or jukebox, into the NetWare file system.
HCSS moves files between the server's faster, but limited-capacity, storage devices (hard disks) and the slower, high-capacity storage devices (magneto-optical disks) in a jukebox.
This process, called data migration and demigration, is mostly hidden from the end user.