When FullMaxdrivesEnforcement is set to the default of Y for yes, the drives used by Recall tasks are counted as part of the MAXDRIVES setting. Recall tasks are however still not limited by the MAXDRIVES setting. If MAXDRIVES is set to five, Externalization tasks can use up to five drives. If a Recall task is started and the MAXDRIVES setting is exceeded, an Externalization task is stopped to free its drives and reduce drive usage to the MAXDRIVES setting. If eight Recall tasks are started, all Externalization tasks will be stopped to free their drives and there will be a total of eight drives in use by Recall Tasks. As the Recall tasks complete and release their drives and drive usage drops below the MAXDRIVES setting, the Externalization tasks will be restarted one by one to complete their work.
Note: If MAXDRIVES is set to zero, the Backstore Engine is not allowed to use tape drives. No Recall or Externalization tasks will be started.
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