Veeam Support Knowledge Base
Backup to Data Domain fails with “Error: calling system(), returns nonzero. Err: 5040 Failed to connect to storage.”

Backup to Data Domain fails with “Error: calling system(), returns nonzero. Err: 5040 Failed to connect to storage.”

KB ID:	2129
Product:	Veeam Backup & Replication
Published:	2016-05-02
Last Modified:	2022-07-06

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Challenge

During the "preparing storage for backup" phase of a Veeam backup job to a Data Domain, the job fails, displaying the following error message:

Error: calling system(), returns nonzero. Err: 5040 Failed to connect to storage

Cause

The Data Domain chooses to use a different NIC than configured. Veeam is unable to communicate with the appliance as a result.

Veeam job log example:

Info     Preparing storage 'backupfile.vbk' for write. Is optimized for de-duplication media 'False'.
Info     [AP] (9150) command: 'prepStorageForWriteEx\nddboost://backupfile.vbk\n8192\n0\n'
Info     [AP] (9150) error: calling system(), returns nonzero. Err: 5040

Solution

Re-add the repository to Veeam Backup & Replication with the production network IP address.

More Information

For more in-depth assistance when troubleshooting this issue, it is recommended to contact EMC support.

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