This update is for HYPER Core systems, HYPER Edge, HYPER Echo and Syneto Virtual Appliance running SynetoOS 6.

Upgrading to this release does not require a reboot when upgrading from releases newer than 6.0.0.6486 (including 6.0.0.6737, 6.0.0.6752, 6.0.0.6756, 6.0.0.6795).

After a reboot, the administrator will be prompted to re-enter the local hypervisor credentials.

Introduction

This update improves licensing management, monitoring reliability, virtual machine handling, and system stability, delivering a more robust and polished SynetoOS 6 experience.

New Features

Licensing and Add-ons

This release introduces support for licensing of software-only products, expanding flexibility for non-hardware-based deployments. As part of this evolution, the Add-ons section has been renamed to Licenses, providing a clearer and more consistent experience. In addition, tiered licenses now explicitly display their associated tier, making license entitlements easier to understand and manage.

Monitoring and Serenity

Alert notifications have been improved with clearer and more informative subject lines and message bodies, making it easier to quickly identify issues. Monitoring coverage has been expanded with new alerts that track the health of additional internal services. All timestamps are now consistently reported using the system’s configured timezone, improving readability and correlation with system events.

VM Management

Virtual machine management has been enhanced to improve visibility and usability. The Guest OS Tools CD-ROM can now be mounted even when the tools are already installed inside the guest operating system. VM details pages now clearly display the configured RAM and CPU resources. On HYPER systems, the local hypervisor is automatically identified and labeled as “local” in the Hypervisors page. VM state refresh operations are also significantly faster when the system is connected to three or more VMware servers.
 

VM Migrations (Import, Convert, Migrate)

The VM migration workflow has been refined to improve reliability and clarity. During Windows VM conversions, the virtio display adapter driver is now installed automatically on Hyperion systems. Import operations are more resilient and can complete successfully even when virtual network interfaces are not correctly defined in the source .vmx file. Additionally, the convert process now clearly communicates that only IDE drives are supported, with SATA drives requiring manual reconfiguration after the conversion.

Software Update

The software update process has been made more robust and transparent. The upgrade button is now automatically disabled when DNS resolution or external services are unavailable, preventing failed upgrade attempts. Download retries for remote packages have been improved, increasing reliability in unstable network conditions. Timestamps have also been added to the software upgrade progress log located at /tmp/software_upgrade_progress.log, making troubleshooting and auditing easier.

Protection & Recovery

Several improvements enhance data protection and recovery workflows. The Recovery tab calendar now features improved color contrast for better readability. Replication targets can be configured with a shorter retention period than the source system, allowing more flexible retention strategies. VM details now display a replica icon when a virtual machine is cloned from a replica. To prevent unsupported configurations, replication targets running on SynetoOS 5 are now blocked. Error messages shown when replication fails due to insufficient storage on the destination have also been clarified to better guide corrective actions.

Disks and Pools

Storage pool flexibility has been increased by allowing drives with different block sizes to coexist within the same pool, simplifying hardware expansion and replacement scenarios.

System

The system now proactively checks the reachability of configured DNS servers and displays a dedicated warning for each DNS server that cannot be reached, helping administrators identify connectivity issues before they impact operations.

Resolved Issues

Monitoring and Serenity

• Fixed an issue where replaced disks were still reported
   
• Fixed the Serenity enable/disable toggle not functioning correctly

VM Management

• Fixed incorrect CPU topology when editing vCPU count
   
• Fixed CPU capacity display on the dashboard (Hyperion only)
   
• Fixed errors when guest OS details are missing from a VM’s .vmx file
   
• Fixed UUID regeneration during VM clone/copy when “Keep MAC address” is enabled (Hyperion only)
   
• Fixed VMs with “:” in their name failing to start (VMware only)

VM Migrations

• Fixed migration failures caused by incorrect free space validation
   
• Fixed migrate operations creating duplicate running VMs when CD-ROM backing storage is missing
   
• Fixed failures when editing vCPUs after convert on multi-vCPU VMs
   
• Fixed incorrect socket count display for multi-vCPU VMs (Hyperion only)

Deployment

• Fixed rare cases where bootloader entries were missing on new machines

Software Update

• Fixed recovery point size being displayed as 0 for up to 24 hours after an update
   
• Fixed upgrades reaching 100% while services were still unready

Protection & Recovery

• Fixed External VM Protection getting stuck when storage is insufficient
   
• Fixed hanging VMware snapshots caused by slow API responses
   
• Fixed erroneous “Deprecated” label on cloned external VMs
   
• Fixed replication scheduling issues, including
   
• Replications running more frequently than defined by SLA
   
• Replication not triggered on same host/pool with different frequencies
   
• Simultaneous replications to multiple targets failing
   
• Replications skipped due to overly strict time checks
   
• SLA policy reassignment not triggering immediate replication
   
• Policy start time not being respected when using fixed-time recovery points

Ongoing Improvements and Future Releases

This SynetoOS 6 update continues the series of ongoing improvements and new features from Syneto. Your feedback is extremely valuable in supporting our commitment to delivering a high-quality operating system. We invite you to explore the new release, discover what’s new, and share your feedback and insights to help shape upcoming SynetoOS features and deliver maximum value.