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

A reboot is not required when upgrading from releases newer than 6.0.0.6486. Upgrading from earlier versions will require a reboot.
To enable the new kernel state dump mechanism (see System Observability), a manual reboot is required, regardless of the version you are upgrading from. This reboot can be performed independently of the software update.

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

Introduction

This update optimises virtual machines memory and resource management in Hyperion, expands virtualisation monitoring and VM interaction capabilities, strengthens system observability with crash dump support and more accurate storage alerts, refines 10G networking performance, and tightens security defaults.

New Features

Hyperion

Drive I/O caching has been optimised to reduce overall RAM consumption, freeing up more memory for running virtual machines. The system now automatically reclaims unused VM memory to improve host memory utilisation. A new syneto-memory-stats command line tool has been introduced, providing detailed insight into how system memory is allocated between system services and running VMs.

Virtualisation

The Dashboard now allows toggling CPU and memory consumption metrics between the local hypervisor only and all connected hypervisors, giving administrators greater flexibility in monitoring their environment. The web console can now send additional critical keystrokes — including [Esc], [F2], and [Del] — directly to running VMs. Support for uploading .img files to the Image Repository has also been added.

System Observability

The system now supports dumping system state when hardware problems lead to kernel hangups, enabling Syneto support to diagnose hardware-related kernel crashes. New alerts have been introduced to notify administrators when root filesystem (/) utilisation exceeds 80% (warning) and 90% (critical). The critical free space alert threshold for data pools has been lowered from 90% to 88% utilisation, providing earlier warning before storage is exhausted. SMART parameter monitoring for NVMe drives has been optimised to reduce false positive alerts, with clearer error messages when drives actually fail.
 

Networking

10Gb NIC performance has been improved through fine-tuned NIC parameters, including ring buffer size adjustments.

Security

The default Remote Support tunnel uptime has been set to 48 hours when enabling remote support, reducing unnecessary exposure windows. Database passwords are now obfuscated in database creation logs.
 

Resolved Issues

Monitoring

• Fixed an issue where monitoring service restarts triggered false positive resolution alerts, informing users that ongoing problems had been resolved when they had not.

Networking

• Fixed an issue where the networking uplink was attached to the first NIC found rather than the first NIC with an active physical connection.

Licensing / Maintenance

• Fixed an issue where subscription status was incorrectly reported as inactive when renewing a maintenance contract ahead of its expiration date.
   

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.