1.3.4 IBM Spectrum Archive Library Edition Plus component 1.4 IBM Spectrum Archive EE cluster configuration  introduction The IBM Spectrum Archive Library Edition Plus (LE+) component is the IBM Spectrum  Archive tape tier of IBM Spectrum Archive EE. It is an enhanced version of the IBM Spectrum  Archive LE that is designed to work with the EE.  The LE+ component is installed on all of the IBM Spectrum Scale nodes that are connected  to the IBM Spectrum Archive EE library. It is the migration target for IBM Spectrum Scale. The  LE+ component accesses the recording space on the physical tape cartridges through its file  system interface and handles the user data as file objects and associated metadata in its  namespace. With IBM Spectrum Archive EE V1.2.4.0 and later, IBM Spectrum Archive LE+ is started  automatically when running the  ltfsee start  command. If errors occur during start of the  IBM Spectrum Archive EE system, run the  ltfsee info nodes  command to display which  component failed to start. For more information about the updated  ltfsee info nodes command, see 7.6, “IBM Spectrum Archive EE automatic node failover” on page 145. This section describes a cluster configuration for IBM Spectrum Archive EE. This  configuration is for single-library, multiple-node access. Single-library, multiple-node access enables access to the same set of IBM Spectrum Archive  EE tape cartridges from more than one IBM Spectrum Archive EE node. The purpose of  enabling this capability is to improve data storage and retrieval performance by assigning  fewer tape drives to each node. When this cluster configuration is used, each IBM Spectrum Archive EE node must have its  own set of drives that is not shared with any other node. In addition, each IBM Spectrum  Archive EE node must have at least one control path drive that is designated as a control path  by an operator of the attached IBM tape library.  IBM Spectrum Archive EE uses the drive that is designated as a control path to communicate  with the tape library. This type of control path is also known as a  media changer device . IBM  Spectrum Archive EE is scalable so you can start out with a single node and add more nodes  later.  Important:  As part of your planning, work with your IBM tape library administrator to  ensure that each IBM Spectrum Archive EE node in your configuration has its own media  changer device (control path) defined in its logical library. Chapter 1. IBM Spectrum Archive Enterprise Edition  13