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

Veeam Backup & Replication
8.x, 9.x
Last Modified:


When preparing storage for backup you receive the following error message: "Error: calling system(), returns nonzero. Err: 5040 Failed to connect to storage"


The Data Domain chooses to use a different NIC than configured. Veeam is unable to communicate with the appliance as a result.
This is visible in the job logs:
Info     Preparing storage '[REDACTED].vbk' for write. Is optimized for de-duplication media 'False'.
Info     [AP] (9150) command: 'prepStorageForWriteEx\nddboost://[REDACTED].vbk\n8192\n0\n'
Info     [AP] (9150) error: calling system(), returns nonzero. Err: 5040


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

More Information

EMC has documentation on this error message, though it does not pertain directly to Veeam; see below. For more in-depth assistance when troubleshooting this issue, it is recommended to contact EMC support.

Please be aware that we’re making changes which will restrict access to product updates for users without an active contract.


Rate the quality of this KB article: 
5 out of 5 based on 3 ratings

Couldn't find what you were looking for?

Below you can submit an idea for a new knowledge base article.

Report a typo on this page:

Please select a spelling error or a typo on this page with your mouse and press CTRL + Enter to report this mistake to us. Thank you!

Spelling error in text: