Up to two redundant copies can be created, which means that a specific file from the GPFS  file system can be stored on three different physical tape cartridges in three different IBM  Spectrum Archive EE tape cartridge pools.  The tape cartridge where the primary replica is stored and the tapes that contain the  redundant copies are referenced in the IBM Spectrum Scale inode with an IBM Spectrum  Archive EE DMAPI attribute. The primary replica is always listed first. Redundant copies are written to their corresponding tape cartridges in the IBM Spectrum  Archive EE format. These tape cartridges can be reconciled, exported, reclaimed, or  imported by using the same commands and procedures that are used for standard migration  without replica creation. Redundant copies must be created in tape cartridge pools that are different from the pool of  the primary replica and different from the pools of other redundant copies. Therefore, create a  DR pool named  DRPool  that exclusively contains the media you plan to Offline Export for  offline vaulting. You must also plan for the following issues: If the primary replica of the IBM Spectrum Archive EE server and IBM Spectrum Scale do not  exist due to a disaster, the redundant copy that is created and stored in an external site  (offline vaulting) will be used for the disaster recovery.  Section 8.23.3, “IBM Spectrum Archive EE tier 1 DR procedure” on page 250 describes the  steps that are used to perform these actions:  Important:  The migration of a pre-migrated file does not create new replicas. Example 8-21 shows you a sample migration policy to migrate all files to three pools. To have  this policy run periodically, see “Using a cron job” on page 169. Example 8-21 Sample of a migration policy  define(user_exclude_list,(PATH_NAME LIKE '/ibm/gpfs/.ltfsee/%' OR PATH_NAME LIKE  '/ibm/gpfs/.SpaceMan/%')) define(is_premigrated,(MISC_ATTRIBUTES LIKE '%M%' AND MISC_ATTRIBUTES NOT LIKE  '%V%')) define(is_migrated,(MISC_ATTRIBUTES LIKE '%V%')) define(is_resident,(NOT MISC_ATTRIBUTES LIKE '%M%')) RULE 'SYSTEM_POOL_PLACEMENT_RULE' SET POOL 'system' RULE EXTERNAL POOL 'LTFSEE_FILES' EXEC '/opt/ibm/ltfsee/bin/ltfsee'  OPTS '-p primary@lib_ltfseevm copy@lib_ltfseevm DR@lib_ltfseevm' GLYPH<SM590000> Regain access to your IBM Spectrum Archive EE data GLYPH<SM590000> Re-create the GPFS file system information GLYPH<SM590000> Recover (import) the offline vaulting tape cartridges to a newly installed IBM Spectrum  Archive EE environment  GLYPH<SM590000> What are the DR steps and procedure? GLYPH<SM590000> How do you handle media lifecycle management with the tape cartridges for offline  vaulting? GLYPH<SM590000> How often do you plan to export and remove of physical tapes for offline vaulting? GLYPH<SM590000> Which file system data is migrated (as another replica) to the DR pool? Chapter 8. Hints, tips, and preferred practices  249