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Barracuda Backup

Site-to-Site and Site-to-Vx Migration Process

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This article refers to the Barracuda Backup Legacy Release firmware or newer.

Contact Barracuda Networks Technical Support to complete your Barracuda Backup Replacement.

Set Up the New Appliance

Before you can replace a device and migrate the data, you must first install and link the new Barracuda Backup appliance. Refer to the Barracuda Backup Quick Start Guide included with your appliance (also available as a PDF download from the Overview page), or use Step 1 and Step 2 in the Getting Started section of this library. Once the device is linked, contact Barracuda Networks Technical Support or your sales engineer to start the migration.

Understand the Migration Process

There are two steps to migrate data from an existing Barracuda Backup appliance to a new unit as detailed in Option 2 in the article Barracuda Backup Replacement and Data Migration:

  • First, the Barracuda Networks migration engineer must copy the metadata and configuration from the original appliance to the new appliance, which typically takes less than 24 hours. Once this is complete, the new device functionally takes the place of the original device, including backup jobs. 
  • Second, the Barracuda Networks migration engineer must copy the actual data from the original appliance to the new appliance. This takes place in the background and does not impact backup jobs. This process can take multiple days depending on the amount of data being transferred as well as network speeds. 

You can view migration progress on the System > Advanced Graphs page in the web interface.

Determine Migration Progress

Use the Disk Space graph to determine the amount of data awaiting migration. Log in to the new appliance web interface, go to the System > Advanced Graphs page, and expand the Disk Space graph. Typically the remaining amount of data to be migrated can be determined using the first two graphs.

For example, in Figure 1 there was roughly 6 TB of data on the original unit before the migration began on Monday afternoon, and at this point the migration has transferred approximately 4.8 TB of data. Because backups have been running since the metadata and configuration were copied to the new appliance, and data has been purged according to retention policies, the migration may finish with slightly more or less data, but this graph provides a good estimate of the current migration progress.

Figure 1. Disk Space.


Use the Local Ethernet Traffic graph to determine the speed at which data is being transferred to the new appliance. Log in to the new appliance web interface, go to the System > Advanced Graphs page, and expand the Local Ethernet Traffic graph. This provides a good indication of the speed at which data is being transferred.

For example, in Figure 2, the Inbound traffic in green shows that the migration is running at around 20MB per second or 160Mb per second. The Inbound traffic spikes represent backup jobs that are running at night, in this case starting around 10:30pm, but the constant 20MB per second bandwidth usage is the box-to-box data transfer. At 20MB per second one can expect around 1.5 TB of data transfer per day. This is in line with the increase shown in Figure 1, Disk Space.

Figure 2. Local Ethernet Traffic.



Note that these graphs show rough numbers but provide a good indication of migration progress and the amount of time remaining.

Once data transfer is complete, the Barracuda Networks migration engineer performs the final steps to complete the process. Once verification is complete, you will receive a notification indicating the process is complete. At this point the Inbound Local Ethernet Traffic drops back to around 0 when backups are not running. If you have questions about your migration, contact Barracuda Networks Technical Support.

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