Hyper Converged Infrastructure (HCI/aSV)

Sangfor HCI and aSV provide a unified infrastructure combining compute, storage, networking, and built-in security to simplify deployment, operations, and services.
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6.11.1R1
Hyper Converged Infrastructure (HCI/aSV) {{ breadTitle }} User Manual Reliability Configuration Guide Virtual Machine Disaster Recovery and Backup Backup in Quiesced Mode
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Backup in Quiesced Mode

{{ $t('productDocDetail.updateTime') }}: 2026-01-05

Description

Windows VMs can be quiesced. That is, a VM is backed up after data in the file system cache or business system cache is stored in disks, ensuring data consistency and preventing a startup failure of the business VM or internal application.

• When a VM backup is created manually, based on a scheduled backup policy, or based on a CDP policy, the guest file system can be quiesced.

• During backup copy and backup archiving, backup files can be synchronized in quiesced mode.

Precautions

  1. This feature is available only to the following Windows operating systems.

Windows 7 32-bit/64-bit

Windows 8 32-bit/64-bit

Windows 10

Windows 11

Windows Server 2003 32-bit/64-bit

Windows Server 2008 32-bit/64-bit

Windows Server 2008 R2

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

  1. During backup creation based on a scheduled backup policy or CDP policy in quiesced mode, if the target VM does not support this feature or fails to be quiesced, the backup will be created in non-quiesced mode and a description will be recorded in the operation log file.
  2. When backups are created in quiesced mode, consistency can be ensured for the NTFS and the applications that support this mode.
  3. To ensure proper backup in quiesced mode, you need to verify the running status of the Windows services on which this feature depends to ensure that:

• The COM+ System Application service has been started, with the startup type set to Manual.

• The COM+ Event System service has been started, with the startup type set to Automatic.

• The Volume Shadow Copy service is not running, with the startup type set to Manual.

  1. If Quiesce Guest File System is enabled in a CDP policy, this feature applies only to CDP policy-based backups but not to I/O logs.

Prerequisites

vmTools has been installed on the target VM.

Steps

  1. Open the Create Backup dialog box for the target VM and select Enable for Quiesce Guest File System. For details, see section 8.9.1.1 "Manual Backup."

  1. Click OK. The VM will be backed up in a few minutes.
  2. Go to Compute > List, click the drop-down arrow next to the target VM, and select Summary. Then, click the Backup/CDP tab and check whether a backup has been created in quiesced mode.