# Rebuilding the Metallic Backup Gateway Server for On-Premises Data Centers

You can rebuild the Metallic backup gateway server in on-premises environments following a system crash or during migration to a new system.

## Before You Begin

- The replacement system must have equal or higher hardware configuration compared to the original gateway.

- Use the same hostname as the original gateway server.

## Procedure

1. Install and configure a new system to replace the failed or decommissioned backup gateway. Refer Protecting On-Premises Data Sources Using a Backup Gateway for platform-specific deployment steps for Windows or Linux.

2. Register the new backup gateway and ensure that the gateway appears online in the Metallic console.

3. Open a priority support ticket with Metallic Support to begin the recovery of:

   - The offline deduplication database

   - The associated mount path on the storage target

## What to Do Next

- After recovery, ensure the disk or cloud storage library used by the new gateway server is in online status.

- Execute a restore operation to confirm that existing backup data is accessible and recoverable.

- Run a backup job to validate the data path to the libraries through the new gateway.

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