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ID: KB0036
Product Version: 69.0
Last Modified: 31 Dec 201527 September 2019

Problem

Error message is stating that an error has occurred while backing VM processing fails. The following error message appears:

Code Block
languagetext
An error has occurred while backing up/replicating/recovering one or more disks of the VM.

Possible

...

Causes

Table of Contents
minLevel3

DNS Issues

  • There might be a problem with resolving ESXi a host DNS name on the Transporter machine where the Transporter is installed.
  • ESXi The host might have multiple IPs in different networks, while with some of them are not reachable by the Transporter.

Make sure Verify that:

  • Source The source and target ESXi hosts can be pinged from the appropriate Transporter (using both DNS name and IP).
  • If ping fails, edit the HOSTS file on the Transporter machine and specify the proper DNS resolution rules.

Closed Ports

...

NAKIVO Backup & Replication requires the following certain TCP ports to be open :

TCP Port
(Default)
WhereDescription
4443DirectorUsed by web browser to access the Director web UI. Must be open on the machine where the Director is installed.
9446TransporterUsed by Director and Transporters for communication with a Transporter. Must be open on the machine where the Transporter is installed.
94447-10000TransporterUsed by Transporters for cross-Transporter data transfer. Must be open on the machine where the Transporter is installed.
443vCenter Server
ESXi host

Used by Director and Transporters to access VMware infrastructure. Must be open on vCenter Servers, source and target ESXi hosts.

902ESXi host

Used by Transporters to access VMware infrastructure. Must be open on source and target ESXi hosts.

Make sure that: 

for successful VM processing. Refer to the Deployment Requirements article for details. 

Verify that: 

  • The required ports are not being used by other applications.
  • Required The required ports are not blocked by firewall.

...

  • The ports are accessible from the appropriate endpoints.

Server Outage

  • Source The source or target ESXi host might be disconnected or powered off.
  • Source The source or target Transporter might be disconnected or powered off.

Make sure that all ESXi hosts and all Transporters are available.

VMware Specific Issues

Outdated Free VMware ESXi host

  • Free VMware ESXi host certificate might be outdated

Make sure that the certificate is up to date. To generate the latest certificate for Free ESXi, read the corresponding section of the VMware Security guide.


VPXA service issue

  • VPXA service on the target ESXi host could be stuck or working incorrectly.

Try to restart the service. Refer to the VMware Knowledge Base article for details.

VM Disk Issues

  • The target VM disk might not exist
  • The target VM could not be changed
  • Host might have failed to write some data blocks to the target VM.

Perform the following actions:

  •  If possible, use a different datastore for recovery
  • Check host events/logs of the storage device to see if there is any indication of problems.
SEO Metadata
composedTitleDisk-Level Job Failure – NAKIVO Knowledge Base

VMware VM processing fails. The following error message appears: An error has occurred while backing up/replicating/recovering one or more disks of the VM.