You see this alert in WebCP > Monitoring > Alerts:

No internet connection on the node <node>.

The following requirements must be met before installing upgrade to Acronis Cyber Infrastructure 3.0:


The following type of alert is being observed in WebCP > Monitoring > Alerts:

Network interface “<iface_name>” on node “<hostname>” is missing important features (or has them disabled): “<feature_name>”.


Acronis Cyber Infrastructure periodically checks each network interface for features that are important from performance point of view and shows the corresponding alert warning about missing features.


1. Backup storage was created with Acronis Cyber Infrastructure (ACI) and registered in Acronis Management Server (AMS) with some DNS name specified during configuration, e.g.:

2. Registered Acronis Cyber Infrastructure backup storage is listed in AMS > Settings > Storage Node tab:

ACI node was deployed in Azure VM per documentation "Backup Gateway Quick Start Guide for Microsoft Azure" with version less then 3.5. azure-cli package in version less than 2.0.77-1 is installed.

Attempt to perform cluster update or check updates via WebCP fails without specific error, manual attempt to update azure-cli package separately fails due to dependency issue.

You get this error message on attempt to check cluster updates or start updates via WebCP -> Settings -> Updates:

Failed to start update check
Yum repository is inaccessible on <node_name>

Yum repository is accessible from the affected node, however, the log /var/log/vstorage-ui-agent/software-updates.log contains the following messages:

error: cannot open Packages database in /var/lib/rpm

The following behavior is observed in Acronis Cyber Infrastructure (ACI) cluster:

1. Alerts "Node is offline" suddenly appear for all nodes in a cluster for a short period of time. During this time, status of the Storage is displayed as 'Unavailable' per WebCP dashboard.

2. Cluster is displayed as 'Healthy' when checking status of the cluster via CLI.

3. No any real interruptions of storage services are noticed while these alerts appear.

4. Cluster version is below 4.0.1-44.


You use Acronis Cyber Infrastructure with SPLA licensing model. All writing operations in cluster (including backup processing) start failing and the following alert is displayed in WebCP > Monitoring > Alerts:

The license of cluster “<cluster_name>” has expired. Сontact your reseller to update your license immediately!

Manual license check shows 'EXPIRED' status, e.g.:


After Acronis Cyber Infrastructure update to version 4.0, disk blink option became not available - greyed out, although this funcion was working well before update, e.g.:


After initiation of storage disk "Release" operation one of the following situations occurred causing disk release interruption:

1. CS located on the releasing disk failed, checked and recovered;

2. The node where releasing disk located was entered into Maintenance mode and exited from Maintenance afterwards.

The article describes step-by-step how to register new Acronis Backup Gateway (ABGW) with existing ID and connect it to existing NFS share storing existing backup archives remained from the previous installation of ABGW.

In WebCP, some nodes or disks are marked as FAILED and the storage icon is shown in red.

In the output of vstorage -c <clustername> top command some of CSs are in the Failed state.

One or more of the following events are found in the vstorage -c <clustername> get-event output:
MDS WRN: CS#1025 have reported IO error on pushing chunk 1cee of 'data.0', please check disks
MDS ERR CS#1026 detected back storage I/O failure
MDS ERR CS#1026 detected journal I/O failure
MDS WRN: Integrity failed accessing 'data.0' by the client at
MDS WRN: CS#1025 is failed permanently and will not be used for new chunks allocation

As a service provider using Acronis Cyber Cloud solution you have a hybrid storage organized for storing backups such as Acronis Cyber Infrastructure. After update of ACI cluster to the version 3.5.4 (24) you started to observe failing backups with Network connection failed due to timeout error.


1. ACI cluster is updated to 3.5.4-24 version:


The following alert is being observed in MONITORING > ALERTS on Acronis Cyber Infrastructure cluster with block storage configured:

Acronis Cyber Infrastructure  (ACI) is a storage cluster, a group of servers (nodes) interconnected by the network, thus it is vital to follow the Network Requirements during cluster infrastructure planning.

As overall storage cluster performance always depends on network performance between all cluster nodes, it may be required to measure network throughput to pinpoint the network issues or estimate maximum possible throughput between the nodes. iPerf3 is a command-line tool for performing network throughput measurements which may be used as a part of network troubleshooting.


1. Attempt to create Compute Cluster in Acronis Cyber Infrastructure cluster fails with the following error:

Some nodes did not pass hardware validation. Node "XXXX" must have hardware virtualization enabled.



1. A network is assigned to the nodes interfaces having IPs belonging to different subnets as may be seen in WebCP > Infrastructure > Networks, e.g.:


Backup Gateway on Microsoft Azure to store backups in the Azure cloud is being deployed per Acronis Cyber Infrastructure Backup Gateway Quick Start Guide for Microsoft Azure.

This troubleshooting guide is applicable in cases when deployment failed on the InitializeStorage step:


Depending on the version of Acronis Cyber Infrastracture one of the following alerts may be observed in WebCP > Monitoring > Alerts:

1. With ACI version 4.0 and lower:

Disk write cache disabled for disk <disk_name> on node "<node_name>"

2. With ACI version 4.5 and higher:


WebCP and Grafana monitoring dashboards do not reflect performance information on any of the monitoring charts e.g:



The following situation is being observed:

1. ABGW with NFS backend is deployed, node connects to NFS share IP via interface which does not have any ACI networks assigned;

2. After update from ACI 4.5 to 4.6 vstorage-abgw service started to fail with "failed to mount" error in /var/log/vstorage/abgw.log.zst log:


1. On multi-node Acronis Cyber Infrastructure cluster after downloading updates via WebCP > Settings > Updates > Download there is no Install button:

2. Manual check of update status via CLI shows that one of the nodes has status uptodate while another ones are in download_completed status:

This article explains how to open Acronis Backup Gateway logs. It is required for the troubleshooting storage-related issues.

In Acronis Storage 2.0, logs were written to a .gz file. Since Acronis Storage 2.1, Acronis Software-Defined Infrastructure and Acronis Cyber Infrastructure, logs are written to a .zst file. 

Log location, format and default rotation can be checked in Acronis Backup Gateway configuration file, e.g.:


After Acronis Cyber Infrastructure (ACI) update to version 4.7 the alert of type A CS service has too big journal appeared in WebCP > Monitoring > Alerts, e.g.:

The journal of the CS#1025 on the host node01.vstoragedomain, disk sdc has size 1168M, recommended size is 282M.


This article describes upgrade path for Acronis Storage 2.x (AS) / Acronis Software-Defined Infrastructure (SDI) / Acronis Cyber Infrastructure (ACI) Clusters to the latest version.

More information regarding the exact software versions may be found in Acronis Cyber Infrastructure Release Notes.


1. Backup storage was registered initially with ACI version 4.5 and below;

2. Attempt to update ABGW certificate via WebCP > Storage Services > Backup Storage > Settings > Certificate or via CLI in ACI 4.6/4.7.0 fails with error like the following:

Cloud installation setup id '1549158355606fa6e94ef55b33886b73-1637911640' does not match the response of account server '7907a68a-af39-45b2-af96-d0971ec7e544'


1. Manual ACI Backup Gateway registration in Acronis Cyber Cloud per Backup Gateway Quick Start Guide or attempt to update Backup Storage certificates fails with the following error in UI:

Incorrect username or password.

As a service provider using Acronis Backup Cloud solution you can have a hybrid storage organized for storing backups (such as Acronis Cyber Infrastructure/Acronis Software-Defined Infrastructure/Acronis Storage).

There may be a situation requiring you to change the address of the hybrid storage. Below are instructions on how to perform this operation for different versions of Acronis Cyber Infrastructure/Acronis Storage.