Storage Controller Priority-Based Metadata Recovery

The patent segments the meta-data recovery process by dividing volumes into different priority groups (first priority and second priority). Instead of recovering all meta-data simultaneously, the system recovers meta-data for first priority volumes first, then proceeds to second priority volumes. This segmentation allows critical services to be restored quickly while maintaining complete service restoration ultimately.

The patent implements preliminary action by pre-assigning priority levels to different volumes before service stoppage occurs. The volume mapping table stores priority information that guides the recovery sequence. When service stops, the system immediately knows which meta-data to recover first based on pre-established priorities, eliminating the need to assess priorities during recovery and reducing overall recovery time.

The patent merges the priority management function with the existing volume mapping table structure. Instead of creating a separate complex priority management system, the priority information is integrated into the volume mapping table that already exists for LBA mapping. This combining approach maintains productivity benefits while minimizing additional system complexity.

The system implements self-service by automatically using the priority information stored in the volume mapping table to determine the recovery sequence without requiring external intervention or complex management protocols. The storage controller autonomously retrieves priority data from the volume mapping table and executes recovery operations accordingly, reducing the need for additional management infrastructure.