Veeam Support Knowledge Base
VM Uptime in Hyper-V Manager Might Reset During Backup

VM Uptime in Hyper-V Manager Might Reset During Backup

KB ID:	1896
Product:	Veeam Backup & Replication
Version:	all
Published:	2014-06-16
Last Modified:	2025-05-08

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Article Applicability

This article is relevant only to Hyper-V on Server 2012 and Server 2012 R2.

Note: Server 2012 R2 reached end-of-life on October 10, 2023.

Offline backup (or saved state backup) is a native Microsoft Hyper-V approach to quiesce VMs before taking a volume snapshot. Offline backup is not applicable to VMs registered on Microsoft Hyper-V Server 2016 or later.

Challenge

System uptime reported by Hyper-V manager appears inaccurate after Application-Aware enabled backup or replication. System uptime inside the guest OS is accurate.

Cause

The Application-Aware backup process in Hyper-V 2012 R2 will use Saved State (Offline Backup) backup if Online Backup is not available. The Saved State backup process causes the system uptime counter in Hyper-V manager to reset.

Solution

Find the issue preventing Online Backup, causing Veeam to use the Saved State backup.
Ignore the time reported by Hyper-V Manager and instead reference the uptime reported by the guest OS.
Enable Application-Aware only for VMs that need it to minimize the issue.

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