Before you begin this procedure, ensure that the following prerequisites are met: IBM Spectrum Archive EE requires space for the file metadata, which is stored in the LTFS  metadata directory. The metadata directory can be stored in its own GPFS file system, or it  can share the GPFS file system that is being space-managed with IBM Spectrum Archive EE. The file system that is used for the LTFS metadata directory must be created and mounted  before the IBM Spectrum Archive EE configuration is performed. The following requirements  apply to the GPFS file system that is used for the LTFS metadata directory: To create and mount the GPFS file system, complete the following steps: In this example,  /dev/gpfs  is the file system name and  /ibm/glues  is the mount point. For  a separate file system that is used only for the LTFS metadata directory, you do not need  to use the  -z  option. Generally, if a GPFS file system is not intended to be IBM Spectrum  Archive EE managed, it should not be DMAPI-enabled, so the  -z  option should not be  specified. The preferred configuration is to have one file system with DMAPI-enabled. For more information about the  mmmount  command, see either of the following resources:  GLYPH<SM590000> IBM Spectrum Scale is installed on each of the IBM Spectrum Archive EE nodes. GLYPH<SM590000> The IBM Spectrum Scale cluster is created and all of the IBM Spectrum Archive EE nodes  belong to the cluster. GLYPH<SM590000> The file system must be mounted and accessible from all of the IBM Spectrum Archive EE  nodes in the cluster. GLYPH<SM590000> The GPFS file system (or systems) that are space-managed with IBM Spectrum Archive  EE must be DMAPI enabled. 1. Create a network shared disk (NSD), if necessary, by running the following command. It is  possible to share an existing NSD with another GPFS file system. 2. Start the GPFS service (if it is not started already) by running the following command: 3. Create the GPFS file system by running the following command. For more information  about the file system name and mount point, see 6.1.1, “Configuration worksheet tables”  on page 96. 4. Mount the GPFS file system by running the following command: GLYPH<SM590000> General Parallel File System Version 4 Release 1.0.4 Advanced Administration Guide ,  SC23-7032-01 GLYPH<SM590000> IBM Spectrum Scale: Administration Guide , which is available at this website: # mmstartup -a # mmcrfs /dev/gpfs nsd00 -z yes -T /ibm/glues # mmmount gpfs -a https://www.ibm.com/support/knowledgecenter/STXKQY # mmcrnsd -F nsd.list -v no <<nsd.list>> %nsd: device=/dev/dm-3 nsd=nsd00 servers=ltfs01, ltfs02, ltfs03, ltfs04 usage=dataAndMetadata Chapter 6. Configuration  103