Rules for an External Restore

Before you begin an external restore, keep the following rules in mind:

• You must externally restore from an external backup. Although the external backup is treated as a level-0 backup, it might actually be a non-Informix incremental backup.
• You cannot externally restore temporary dbspaces.
• You cannot externally restore from regular ontape backups.
• You cannot verify that you are restoring from the correct backup and that the storage media is readable using ontape.
• If the external backups are from different times, the external restore uses the beginning logical log from the oldest backup.
• Salvage the logical logs (ontape -l) before you switch the disks that contain the critical storage spaces.
• If you are restoring critical dbspaces, the database server must be offline.
• If you are restoring the rootdbs, disable mirroring during the restore.
• The external backups of all critical dbspaces of the database server instance must have been simultaneous. All critical dbspaces must have been backed up within the same onmode -c block ... onmode -c unblock command bracket.