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Frequently Asked Questions
Backup and Replication
Backing Up Non-VSS-Aware Applications
Backing Up Paid (Marketplace) EC2 Instances
Backing Up to Removable Disks in Rotation
Backup of a VM's RAM
Backup of VM Swap Files
Data Transfer Modes
Editing Protect Until Option for Recovery Points
Excluding Files from Backup or Replication
How Amazon EC2 Instance Replication Works
How to Back Up and Recover vCenter VMs Connected to dSwitch
How to Back Up a PostgreSQL Database
How to Stop Backing Up a VM
Keeping Recovery Points
Managing Real-Time Replication components
The Replication Process Slows Down After CBT Reset
VM Cannot Be Selected for Backup or Replication
Backup Repository
Automating Backup Repository Copy
Comparison of Backup Repository Types
Extending Backup Repository on Virtual Appliance
How Backup Repository Encryption Works
How Forever Incremental Backups Are Stored
How Recovery Point Expiration Dates Are Calculated
How to Move Backups to an Incremental-with-Full-Backups Repository
HPE StoreOnce Catalyst Limitation
Importing a Backup Repository in Another Instance of NAKIVO Backup & Replication
Integrating with EMC DD Boost
Integrating with NEC HYDRAstor
Manual Backup Repository Encryption
Maximum Number of Repositories for DC Transporter
Moving a Backup Repository to a New Location
SaaS Backup Repository is Inaccessible After Power Outage or Forced Reboot
Installation and Deployment
Creating and Installing Custom CA-Signed Certificate
Custom CA-Signed Certificate Compatibility
How to Migrate a PostgreSQL Database to a New Version on a NAS Device
How to Migrate System Configuration to New VMware Virtual Appliance
How to Identify the CPU Architecture of a Generic ARM-Based Device
How to Identify the CPU Architecture of an ASUSTOR NAS Processor
How to Identify the CPU Architecture of a QNAP NAS Processor
How to Identify the CPU Architecture of a Synology NAS Processor
Migrating to Newer Version of Virtual Appliance
Migration Using an External PostgreSQL Database
Required API Permissions for Microsoft 365
Required AWS IAM Permissions for Amazon EC2
Required AWS IAM Permissions for Amazon S3 and Backblaze
Required AWS Permissions for AWS KMS Key Creation
Required ESXi Permissions
Required VMware vSphere Permissions
Update Failure on Physical Servers Due to SMB Issues
Updating NAKIVO Backup & Replication
Updating Ubuntu OS on the Machine with NAKIVO Backup and Replication
Miscellaneous
Difference Between Source and Target Transporters
Failed to Connect to Active Directory Domain
Free ESXi Cannot Be Discovered
GC Overhead Limit Exceeded
High Availability of NAKIVO Backup and Replication
How Job Merging Works
Invalid AD Group Name Error
IPv6 Support
Log4j2 (CVE-2021-44228) Vulnerability
NAKIVO API Best Practices
Operational Limits for NAKIVO Backup and Replication
PostgreSQL in SaaS Repository
Preferred Prioritized Group Is Not Found
Removing CA-signed Certificate
Retention Planning for Wasabi
Security Considerations
Setting Up a Dedicated Backup Network
Spring4Shell (CVE-2022-22965) Vulnerability
SSH Requirements for NAKIVO Backup and Replication
Starting and Stopping Product Services
Transporter Connection Issues
Transporter Deployment for SAN Access
Using Dedicated Backup or Replication Network
White Screen in Browser
Performance
Improving Backup Performance over WAN
Long Initial (Full) VM Backup
Network Acceleration is not Working
VM Backup is Slow under Load
Why Incremental Backups May Run Like Full Backups
Recovery
How to Restore a VMware vCenter with NAKIVO Backup and Replication
How to Restrict Users From Viewing M365 Emails Before Recovery
Protecting Recovered VMs
Recommendations on Recovering Domain Controller
Recovering with VM Replicas
Screenshot Verification Fails During Flash VM Boot Job
Troubleshooting Flash VM Boot
Why Chain of Recovery Points is Recovered Instead of One Selected Incremental Point
Supported Platforms
Cannot add a Hyper-V Server if User Is not Built-In Administrator
Free ESXi Backup Limitations
How to Add Google Cloud Storage
How to Check Drive and Datastore Sector Size
How to Back Up and Recover Proxmox VM Data Using Agent-Based Approach
How to Find the Managed Object ID (MOID) of a VMware vSphere Cluster
VMware Version and Platform Compatibility
PostgreSQL Version and Platform Compatibility
Required APIs For the Generic S3-Compatible Storage Feature
Transferring Licenses Between ESXi Hosts
Tape
Long Preparation During Tape Recovery
Tape Cartridge Disappears From Tapes View When Moving to Mail Slot on Amazon VTL
Tape Cartridge Error After Server Reboot
Tape Cartridge Has no Barcode and UUID
Using Cartridges Without Barcodes to Read or Write Data
Using One Tape Device by Multiple Directors
VTL Discovery Fails if Drives are Mounted as SCSI Targets in Nonconsecutive Order
Writing to Multiple Tape Drives
Application Awareness Issues
Application-Aware Mode for Linux VMs
Application-Aware Mode Requirements for Hyper-V
Failed to Create Quiesced Snapshot of VM
Quiesced Checkpoint of a Hyper-V VM Cannot Be Created
Quiesced Snapshot of Instance Cannot Be Created
Quiesced Snapshot of Physical Machine Cannot Be Created
Taking Quiesced Snapshot of Windows Server 2019 VM Fails
Volume Shadow Copy Service Error on Nutanix
Backup and Replication Issues
Amazon Cross-Account Replication for Marketplace VM Fails with Amazon Generic Error
Backup Copy Fails on Proxmox VM
Backup Fails Due to Microsoft Graph API Restrictions
Backup Job Delays Due to Microsoft 365 API Throttling
Backup Job Stuck in Starting State
Backing Up to Linux Server
Backup job Run Failed for Proxmox VM and Proxmox Template
Backup of 4K Native Disks Fails
Backup for Group Mailbox Subfolders
Cannot Create a VM Backup Snapshot
Corruption Of Recovery Points in Microsoft Azure
Data Size Mismatch
Disk Backup Error
Disk-Level Job Failure
EBS Volumes Cannot Not Be Attached to Transporter
Enabling SSH on ESXi Hosts
Enabling SSH on Proxmox VE Hosts
File Share Backup Job Does Not Back Up a Number of Files
Harden Transporter Alarms
Hot Add Mode Working Incorrectly With Multiple VMs
Instance-Level Job Failure
Job With Existing Replica Fails if Not Original VM Is Mapped
Microsoft 365 Backup Job Failure
Microsoft 365 Backup Job is Locked
Microsoft 365 Backup/Recovery Requires Direct Internet Access
Microsoft 365 Exchange Backup Failure
NFS File Share Location Cannot Be Reached by the Transporter
NFS Share Backup Transfers No Data
Physical Machine Job Fails Due to Unsupported Disks
Physical Machine Backup: Unsupported Volumes
Proxmox Backup Failure
Proxmox Backup Failure Caused by Zeroinit Filter
Proxmox Backup Warns about SQL Log Truncation Permissions
Replication or Recovery Job Cannot be Started
Replica VM Cannot Be Powered On
Slow Speed When Copying a Backup to Tape
Snapshot Invalidated by the Source System
Temporary Checkpoint Cannot Be Created for Hyper-V 2016 and 2019
Temporary Disks Fail to Attach During the Proxmox Backup
The Attached Disks Are Not Detached after the RTR Job Run
Troubleshooting Stuck Jobs
VM-Level Job Failure
VM Verification Fails for Jobs with Direct Connect
VMware vSphere Backup Job: Storage API Error
VMware vSphere/Hyper-V Backup Job Failure: Infrastructure Has Changed
Volume-Level Job Failure
Backup Repository Issues
Problem with the Backup Infrastructure
Backup Repository - Insufficient Permissions
Cannot attach an Encrypted Repository
Cannot Create a Backup Repository on a CIFS Share
Cannot Create a Backup Repository on a Network Drive
Cannot Create a Backup Repository on an NFS Share
Corrupted Backup Object Disk Issue
Corrupted Backup Repository
Customizing File Size Limitation of the VA Backup Repository
Dealing with Corrupted Recovery Points
Encryption for Repositories in CentOS
FreeNAS: Backup Repository Creation Fails
Increasing the Repository Limit on the EXT4 Filesystem
Repository Space Reclaim Was Interrupted
Repository can’t be attached
Repository Verification Takes Too Long
Space Reclaim Doesn't Stop via UI
Target Object Already Exists
Troubleshooting S3-Compatible Repositories
Change Tracking Issues
CBT Reset Failure
Change Tracking Data Was Not Provided
Enabling CBT for a VM
ESXi Host Did Not Provide Valid CBT Data
Proxmox VE VM Did Not Provide Valid CBT Data
VMware CBT, Hyper-V RCT, or Nutanix CRT Is Not Supported
Unknown Change Tracking Version
Director and Transporter Issues
Cannot Access NAKIVO Director After VM Restart
Cannot Access Transporter
Cannot Add Existing EC2 Transporter
Cannot Add Physical Machine via Direct Connect
Cannot Discover Hyper-V Cluster with Direct Connect Transporter
Cannot Open Journal Disk During RTR Failover
Checking Transporter Connection
Checking Transporter Performance
Checking Transporter Permissions
Communication Protocol Error (ActionException)
Director Installed on Windows Server Fails to Start
Director Machine Failure
External Database Migration Issue: Permission Denied
How to Allocate More RAM to NAKIVO Director Service
How to Allocate More RAM to NAKIVO Transporter Service
How to Update I/O Filter Daemon
Issues During I/O Filter Installation and Uninstallation
Jobs Fail or Alarms Missing Due to Task Pool Limit
Missing Transporter Logs
No Transporters in AWS Account
Proxy Transporter Connection Problem (ActionException)
Transporter Connection Lost
RTR Job Failure: Maximum Transporter Capacity Reached
Transporter Internal Error
Transporter Is Not Available or Reachable
Transporter Machine Fails to Open Source VM Disk
Transporter Machine Failure
Transporter Memory Allocation Error
Transporter Memory Issue During Microsoft 365 Backup
Troubleshooting Transporter Read/Write Issues
Troubleshooting Director Issues
Updating Manually Installed Transporters
Updating Master Password on Transporter
Backup Job Fails on Older CPUs
Installation and Deployment Issues
Add-On Package Cannot Be Installed on Synology NAS
Authentication Problem When Connecting to PostgreSQL
Cannot Add Domain Controller as Physical Machine
Cannot Deploy Transporter When Director Is Not Connected to the Internet
Database Key Mismatch When Connecting to PostgreSQL
Email OAuth 2.0 Configuration on Headless Installations
How to Upgrade NAKIVO Backup & Replication from v9 to v11
Importing System Configuration Using External Database Fails
Installing the Self-Signed Certificate Fails
Launching NAKIVO Backup And Replication on DSM 7 After Upgrading From DSM 6
Physical Machine Agent Installation Failed
Product Cannot Be Updated on 32-bit OS
Required Antivirus Exclusions For Director And Transporter
Skip Unused Blocks Issue in v9.4
SSL Certificate Validation During Installation on FreeNAS
Transporter Does Not Support VMware vSphere
Transporter Installation on Hyper-V Host Failed
Troubleshooting External Database Connection Issues
Troubleshooting Installation
Unable to Add Additional External Databases
Updating Manually on Synology NAS
Updating Physical Transporter Manually
Upgrading Old Version of PostgreSQL on NAS Device
VM Agent Installation Error
Recovery Issues
Adding Microsoft 365 Public Folder Permissions
Application Database Was Not Found
AWS Instances on Windows Recovered with Platform Property Set to Linux
Cannot Boot Up VM After Recovery Job Run
Cannot Load Recovery Point
Cannot Migrate Flash Booted VM on Hyper-V 2019
Cannot Open Database During Microsoft Exchange Mailbox Recovery
Cannot Recover a VM due to vCenter Server Failure
Creation of Bootable Media on Windows OS Machine Fails
Error When Recovering M365 Items
Failure to Verify VMs With EFI Firmware to Windows Server 2012 R2
File and Object Recovery from FreeNAS Does Not Work
File and Object Recovery Issues With Linux OS
File and Object Recovery: Windows Server with Deduplication
File-Level Recovery Fails on Windows
File or Object Recovery Blocked by Firewall on Target Server
File Recovery: Cannot Open Disk
File Recovery: Cannot Open Partition
File Recovery: Connection to Recovery Server Refused
File Recovery: Empty Disk
File Recovery Job Fails With Incorrect Credentials Issue
File Recovery: Multipath Issues
File Recovery: SATA HDD's
Flash VM Boot Job Cannot be Started
Flash VM Boot Recovery for VMs With CentOS
FLR Cannot Detect Source VM IP with Duplicate VMs on Hyper-V
Incorrect Credentials for EC2 Recovery Server
Limitation on the Chain of Incremental Recovery Points
LVMs in RHEL 9 Not Found in File Recovery Wizard
Mailbox Processing Failed Because Autodiscover Service Could Not Be Located
Malware: Scanning Recovered VM Before Deploying to Production
Message Exceeds Maximum Supported Size
Microsoft 365 EWS Error Quota Exceeded
Recovery of the VM Fails Due to Long Path
Required Permissions for Linux Recovery Server
ZIP Download Failures When Access to Files Is Denied
Security Advisory
CVE-2024-48248
CVE-2025-32406
Supported Platforms Issues
Backup Job Fails When CIFS Repository Connection Is Lost
Cannot Add Generic S3-Compatible Storage Account to Inventory
Cannot Add Physical Machine to Inventory
Cannot Add Physical Machine of Unsupported Version
Cannot Add Windows 10 to Inventory
Failed Signature Check When Adding S3-Compatible Storage to the Inventory
File Share Backup Skips Items with FI Repository
Hyper-V Failover Cluster Node Issues After Update
CIFS File Share is Inaccessible
Issues Adding Physical Machines
Issues Installing Different Product Versions on NETGEAR ReadyNAS
Issues with Linux Integration Services (LIS) for Ubuntu 12.04 Server (x64) and SLES 11 SP3/SP4 (x64)
Limitations of Encrypted VMware VM Support
VMware vSphere 8 Unsupported Properties in Compatibility Mode
VMware vSphere 9 Unsupported Properties in Compatibility Mode
Tape Issues
Backup Job Fails When Reusing Tape Cartridge
Backup to Tape Failure
Cannot Read or Write Tape Cartridge
Cannot Retrieve HPE StoreOnce Tape Capacity
Data on Tape Cannot Be Discovered
Tape Cartridge Capacity is Displayed Incorrectly
Tape Cartridge Internal Error
Transport Mode Issues
Hot Add Mode Cannot be Used
Hot Add Mode Requirements and Troubleshooting
SAN Mode Does Not Work on Ubuntu
SAN Transport Mode Cannot Be Started
VMware VM Backup Error in SAN Mode
Web UI Issues
Cannot Access the Web UI
Cannot Open the Web UI
Long Response Time of Web UI
VM Size in Web UI Is Incorrect
Best Practices
Deduplication and Compression Considerations
Defining Backup Repository Size