Veeam Support Knowledge Base
Backups Fail After Upgrade to AOS 5.8.0.1 or Later

Backups Fail After Upgrade to AOS 5.8.0.1 or Later

KB ID:	2742
Product:	Veeam Backup for Nutanix AHV \| 2.0 \| 2.1 \| 3.0 \| 4.0
Published:	2018-08-31
Last Modified:	2024-03-05

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Article Applicability

This article documents a bug (ENG-163615) Nutanix discovered in AOS 5.6.1 and resolved in AOS 5.9.1.

These AOS versions were supported by all versions of Veeam Backup for Nutanix AHV up to version 5. Starting with Veeam Backup for Nutanix AHV 5, the minimum required AOS version was 6.5. As such, this article is only relevant to:

Environments running AOS version 5.6.1 or greater but less than 5.9.1.
Veeam Backup for Nutanix AHV 1, 2, 2.1, 3, and 4.

Challenge

Veeam Backup for Nutanix AHV backup job fails with:

Backup VM [ID: 4a89ffc5-68b3-4be0-b117-0591dcec184e' Name: 'MYVM’] failed. Error: Backup was unsuccessful. Preparing VM for backup failed, 1."

The Prism Element dashboard shows the following failed tasks:

This article is relevant when the following conditions are met:

Nutanix AOS is upgraded up to 5.8.0.1 within the STS (Short Term Support) release branch.
Affinity rules are configured for the affected machines:

Cause

This is a known Nutanix issue and is tracked by Nutanix as an internal bug ENG-163615, which was discovered after the release of Nutanix AOS 5.6.1.

Solution

To resolve this, upgrade to at least AOS 5.9.1, where ENG-163615 was resolved.

If upgrading is not feasible, an alternate solution is to disable the host affinity rules for the affected VMs.

Note: This issue does not affect the LTS (Long Term Support) release branch.

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