Reference This section provides information about the Help pages, REST API, LTO Media, and other reference documentation. Minimum firmware levels for common library featuresSecurityMore information for security and encryption protocols. Differences between 21U and 48U libraries 3555Management GUI functions and rolesREST API for scalable tape librariesThe REST API is a simple application programming interface (API) to manage the 3U scalable tape libraries remotely over an HTTPS interface. This API is requested and needed for manufacturing and for automated test and monitoring systems. Library Configuration FormsMake a copy of these forms, and fill them out as you are installing and configuring your library.LTO mediaLTO™ media is available in various types. Ensure you choose a media type that your drive supports.Replacement partsTS4300 tape library has Tier 1 and Tier 2 CRUs (customer replaceable units). These CRUs are parts of the library that must be added, removed, and replaced by the customer. Tier 1 CRUs do not require tools for installation while Tier 2 CRUs need tools for installation.Manual cartridge removal procedureFollow this procedure if a cartridge must be manually removed and repaired.AccessibilityAccessibility features help a user who has a physical disability, such as restricted mobility or limited vision, to use the HTML version of the customer documentation successfully.Parent topic: IBM TS4300 Tape Library