SYNVirt OS · Stable release
SYNVirt 0.91. Stable release.
This release adds Rapid Recovery, combined VM and container backups, new Guardian controls, SSD acceleration and offline Ceph engine updates.
- Version
- 0.91.4531
- Architecture
- x86_64
- Size
- 1.6 GB
- Released
- 2026-10-12
Files in this release
Only verified, authorized artifacts are published here. Each one carries its version, size and SHA-256 checksum.
SYNVirt OS ISO
Bootable installer for standalone hosts and HCI clusters. A clean install keeps existing storage pools.
f7a62885d339…0639e84eDownloads started: 863
SYNVirt Media Creator Windows
Writes the verified ISO to a USB drive on Windows and checks the signed descriptor before flashing.
66cc4ffe9322…d17f460bDownloads the latest SYNVirt installation image and checks for Media Creator updates from synvirt.io.
Continues to accept authentic image descriptors and Creator notices on synvirt.mx; rejects lookalike domains and ambiguous URLs.
Downloads started: 155
Release notes · 0.91.4531
This release adds Rapid Recovery, combined VM and container backups, new Guardian controls, SSD acceleration and offline Ceph engine updates. Changes are relative to ISO 0.91.4529.
Backup and recovery — synvirt-backupd · 0.91.0011 3
- New Rapid Recovery: prepare a ZFS recovery point and start an isolated VM copy from it.
- Combines VM and container backups in one job, with job actions and execution history in Data Protection.
- Backup encryption is optional; fixes jobs without encryption being blocked when a VM contains protected state such as TPM data.
Cluster and high availability — synvirt-clusterd · 0.91.0010 3
- Guardian lets you configure recovery responses to host failures and isolation.
- Shows planned recovery destinations for VMs and containers, including reasons that prevent recovery.
- New application load balancers offer guided setup and a separate floating virtual IP for each balancer.
Storage — synvirt-storaged · 0.91.0005 2
- Adds SSD acceleration for reads and synchronous writes in hybrid storage.
- Shared accounts appear in Settings; fixes password metadata for SMB shares.
Remote console — synvirt-consoled · 0.91.0018 3
- Moves console tools into a side panel and unifies classic and enhanced session controls, including the clipboard.
- Adds CPU encoding with VP8, VP9 and AV1. Adapts quality to host load and restores it as resources become available.
- Lets you change the guest display resolution and view host CPU use, audio statistics and the active encoder from the console.
Updates — synvirt-updaterd · 0.91.0010 2
- Adds coordinated Ceph engine updates using signed offline packages, with checks across all members and recovery records.
- Fixes direct upgrades to preserve the state of components prepared by the installer.
Containers — synvirt-containersd · 0.91.0015 3
- Shows datastore volumes and lets you manage container backup jobs from Data Protection.
- Fixes file restoration and volume reconnection after restoring a container in place.
- Prevents deleted volumes from reappearing when storage state is synchronized.
Virtual machines — synvirt-vmd · 0.91.0014 3
- The VM view brings together the console, actions and activity, with hardware editing and optical drive removal.
- Shows VM reception progress and keeps power-on disabled until the VM is verified ready.
- Fixes recovery of disks, boot controllers, firmware and TPM state to preserve the backed-up configuration.
Networking — synvirt-network · 0.91.0007 2
- Applies network and physical link changes together to avoid partially applied configurations.
- Fixes MTU validation and preserves the last valid configuration for rollback if a change fails.
Aurora management — synvirt-aurorad · 0.91.0007 2
- A slow host no longer blocks inventory requests to other hosts.
- Fixes application DNS setup during cluster creation and destination checks during transfers.
Access and permissions — synvirt-api · 0.91.0017 2
- Fixes credential exposure in session responses by returning identifiers that cannot be used to authenticate.
- Strengthens permission checks for VM migration and executable uploads to the host.
Distributed storage — synvirt-vsand · 0.91.0006 2
- Checks which cluster disks and services belong to before reusing or removing them.
- Preserves progress when cluster removal is interrupted so pending cleanup can be retried.
Verify before you install.
Compare the checksum of the downloaded file with the published SHA-256. Media Creator does this for you on Windows; on other systems use the commands below.
Identify the release
Make sure the version and architecture match your hosts. Hosts on 0.90.3673-RC1 or older need a clean install.
Download the file and its checksum
The .sha256 file holds the expected hash. The signed descriptor lets Media Creator verify the image before writing it.
Compare the hash
Run the command for your system next to the downloaded file. The output must match the published value exactly.
Linux
sha256sum SYNVirtOS-Lastest.isomacOS
shasum -a 256 SYNVirtOS-Lastest.isoWindows · PowerShell
Get-FileHash .\SYNVirtOS-Lastest.iso -Algorithm SHA256Expected SHA-256
f7a62885d33993924b30647ee1deb29abd4841ecdd90df07a0ba6d640639e84eEvery published file will carry its build identifier, architecture, size and SHA-256. Signatures are shown when verification material is available.
Already running SYNVirt?
Update from the product.
Hosts newer than 0.90.3673-RC1 update from Updates and recovery: online from update.synvirt.mx or by uploading the release ZIP. An update installs completely or not at all, with crash-safe rollback.
Release history
- 0.91.4531Current
This release adds Rapid Recovery, combined VM and container backups, new Guardian controls, SSD acceleration and offline Ceph engine updates. Changes are relative to ISO 0.91.4529.
- 0.90.4039-RC1
Storage by type with Life %, NFS folders reachable over SMB, verified networking with LLDP, three-edition licensing.
- 0.90.3986-RC1
Unified /opt/synvirt layout, Guest OS catalog in VM creation, Guest Tools v2.
- 0.90.3959-RC1
Major release: one file root, SQLite databases, transactional updates and recovery, VM profiles on QEMU 11.1.
Only the current release is available for download; earlier builds are superseded.