Iapetus is the latest entry in our quarterly rollup series. It branches off from our main rolling Voyager development into a fixed target for our partners to qualify and build upon.

This Quarterly release is named after Saturn's moon Iapetus. Fun fact: Iapetus, Saturn's third-largest moon, is the only large moon in the Solar System with a two-tone coloration - one hemisphere bright as snow and the other dark as coal. This dramatic contrast makes it the most distinctive moon orbiting Saturn, with one side ten times brighter than the other, giving it a striking yin-yang appearance from space.

Comet 26.1.0 Iapetus, our latest Quarterly release, marks an important milestone as our Proxmox VE Protected Item graduates from Beta to General Availability. This release also includes numerous enhancements to performance, reliability, and platform support.

As always for a new quarterly release, there are two changelogs for 26.1.0 depending on whether you are coming from the previous quarterly release or the previous Voyager release:

Changes compared to 25.8.2

New Features​

Proxmox General Availability​

With Comet 26.1.0 Iapetus, our Proxmox VE Protected Item has graduated from Beta to General Availability and is production-ready.

Proxmox Virtual Environment is a complete, open-source server management platform for virtualization. It tightly integrates the KVM hypervisor, Linux Containers (LXC), software-defined storage, and networking functionality on a single platform. With the integrated web-based user interface you can manage VMs, containers and high availability for clusters.

Proxmox restores to Ceph/RBD​

Proxmox restores can now be performed to Ceph/RBD storage.

Proxmox backups and restores with non-root users​

Proxmox backups and restores can now be run using a correctly configured non-root user.

Changed block tracking for Proxmox protected items​

Changed block tracking (CBT) is now supported for Proxmox Protected Items, allowing for significantly reduced job times when backing up low-churn datasets.

Proxmox v9 support​

The Proxmox Protected Item type now supports backing up Proxmox version 9.

SAS Relic codesigning​

SAS Relic is now supported as a remote server for codesigning Windows clients.

Ukrainian translation​

Comet now features a Ukrainian (Українська мова) language translation.

Option to enable user home directory sandboxing on Linux​

Linux users now have the option to enable sandboxing of user home directories, with Comet backing up each home directory data as the owner of that directory and thus ensuring that permissions and ACLs are fully respected.

Support shared quotas across multiple Storage Vaults​

Comet 25.9.7 brings initial support for sharing quotas between multiple Storage Vaults, allowing for more flexible storage offerings.

Enhancements​

Added support for the new Wasabi US West 2 (San Jose) region​

In Comet 25.9.2, Wasabi users can now configure buckets for Wasabi's new US West 2 (San Jose) region.

Improved the performance of Comet user APIs, particularly when the server is under load​

Comet 25.9.5 brings substantial under-the-hood improvements to the performance of APIs used in regular activities, reducing load on busy servers and increasing throughput of short-lived backup jobs.

Support for running multiple commands in a Program Output Protected Item​

Multiple streams of program output can now be combined into a single program output Protected Item, each with an assigned file name to be used upon restore, allowing for related sets of data to be configured and scheduled in unison.

Tags for custom backup jobs​

Custom backup jobs started via the API can now have tags specified, allowing these jobs to be identified and retrieved by tag through the job history search in the Management Console and through the API.

Added APIs to get, update and delete Protected Items​

API users can now get, update, and delete Protected Items in isolation, without having to interact with the rest of the user profile.

Configure Proxmox Changed Block Tracking in Comet Backup Desktop App​

Changed Block Tracking can now be selected for Proxmox backups via the Comet Backup desktop app

Visually See Offline Proxmox Nodes​

The Proxmox Protected Item now displays offline nodes with clear visual indicator in the items window. This improvements makes it significantly easier to understand the status of nodes in your Proxmox Cluster.

Changes compared to 25.9.11

Bug Fixes​

• Fixed an issue with unable to parse Proxmox storage names with upper-case letters
• Fixed an issue where the Proxmox PI Web UI incorrectly rendered expand/collapse controls on leaf items
• Fixed an issue with displaying EBR volumes at the time of granular restore
• Fixed a cosmetic issue with outdated EULA text when installing the self-hosted Comet Core for Windows

Changes compared to 25.9.10

Enhancements​

• The Comet Management Console web interface now allows creating Proxmox Protected Items to backup up all-of-cluster or all-of-node
• The Comet Management Console web interface now supports exclusions for Proxmox protected items
• Local root or Administrator permissions are now required to login/logout of the backup service

Bug Fixes​

• Fixed an issue causing a VM's selection state to be incorrect after deselecting a disk from a fully selected VM
• Fixed an issue preventing the use of tenant storage templates in the 'Add User' dialog when adding a user on behalf of a tenant
• Fixed an issue causing an incorrect number of disk partitions to be reported as protected for some disk image Protected Items
• Fixed an issue causing ReFS volumes to fail to backup in some cases
• Fixed an issue with the Linux Disk Image Protected Item not correctly reporting errors that occurred when mounting ext4 snapshots
• Fixed a cosmetic issue causing incorrect text to be displayed during restore of disk image Protected Items

Changes compared to 25.9.9

Bug Fixes​

• Fixed an issue causing unused disks to appear in the hardware UI after performing a Proxmox-to-Proxmox restore
• Fixed an issue causing request failures in Office 365 restore jobs
• Fixed an issue causing the web UI to appear unresponsive when a test connection runs
• Fixed an issue causing content read failures when retrieving data from OneDrive
• Fixed an issue causing request failures when performing a connection test with Office 365
• Fixed an issue with Comet Core's System Self-Backup schedule editor crashing when an existing schedule doesn't have a time zone

Changes compared to 25.9.9

Enhancements​

• Updated the Storage Vault Retention tab to show only Storage Vaults associated with the current device
• Added more details to the job logs for Proxmox restore jobs
• Exposed warnings in the job log when allocating drives for Proxmox restore jobs

Bug Fixes​

• Fixed an issue with the Proxmox Protected Item dialog in the Comet Management Console web interface rendering the Advanced tab multiple times when authentication was unsuccessful
• Fixed an issue with hardware configurations used during restoration of Windows environments from VMware/Hyper-V to Proxmox
• Fixed an issue causing connections to be blocked to Proxmox clusters with one or more nodes down
• Fixed a cosmetic issue rendering overflowing content unable to be scrolled in some areas of the Comet Management Console web interface

Changes compared to 25.8.1

New Features​

Proxmox backups and restores with non-root users​

In Comet 25.8.2, Proxmox backups and restores can now be run using a correctly configured non-root user.

Proxmox restores to Ceph/RBD​

Proxmox restores can now be performed to Ceph/RBD storage.

Changed block tracking for Proxmox protected items​

Changed block tracking (CBT) is now supported for Proxmox Protected Items, allowing for significantly reduced job times when backing up low-churn datasets.

Enhancements​

Added support for backing up stopped Proxmox VMs​

Stopped Proxmox VMs can now be started in a suspended state, allowing them to be backed up.

Storage Template support for new Impossible Cloud regions​

Storage Templates can now be configured for Impossible Cloud's new West-2 and North-1 regions.

Added support for restoring Proxmox LXC containers​

Comet 25.8.2 has added support for performing restores of Proxmox LXC containers back into Proxmox.

Bug Fixes​

• Fixed an issue processing changes by administrators
• Fixed an encoding issue in the Comet Management Console web interface
• Fixed an issue processing changes by tenant administrators
• Fixed an issue leading to incorrect date selections when configuring a monthly schedule in the Comet Backup desktop app
• Fixed an issue with future Deep Verify operations on a Storage Vault being blocked if multiple jobs tried to simultaneously initialize the vault on its first use
• Fixed an issue leading to inaccuracies in SMB-backed Storage Gateway disk size reporting
• Fixed an issue in the Comet Management Console web interface causing the header for the size column to be formatted incorrectly in exported job history
• Fixed an issue in the Comet Management Console web interface affecting the human readable formatting of 'n/a' duration values in exported job history
• Fixed an issue building device associations when creating custom Storage Vaults from the Comet Management Console
• Fixed an issue causing Windows Disk Image backups to fail on host devices with Windows Containers enabled
• Fixed an issue with Comet attempting to backup external VSS snapshots in a Windows Disk Image backup
• Fixed an issue with missing warning messages when manually starting cometd.exe on Windows outside of a service context
• Fixed a cosmetic issue with the window size changing when editing a Proxmox Protected Item from the Comet Backup desktop application
• Fixed an issue with 'Invalid Authentication' errors when a user profile has many thousands of Protected Items and/or Storage Vaults
• Fixed an issue with process argument visibility when using the Comet Backup desktop application
• Fixed an issue with unresponsive cancellation when accessing a remote Proxmox VE server
• Improved the handling of failed message downloads during Office 365 backups by falling back to alternative retrieval methods
• Fixed an issue with the Comet Backup agent failing to open Storage Vaults when multiple keys are present
• Fixed an issue preventing Comet from restoring a Proxmox VM when not all disks were backed up
• Fixed an issue with not respecting the choice of target backup method for Proxmox LXC containers
• Fixed an issue preventing the horizontal scrollbar appearing on the user group management page when overflowing
• Fixed an issue with timing alignment in some scenarios causing scheduled backups not to start

Changes compared to 25.9.7

New Features​

Support shared quotas across multiple Storage Vaults​

Comet 25.9.7 brings initial support for sharing quotas between multiple Storage Vaults, allowing for more flexible storage offerings.

Enhancements​

• The backup job progress bar and ETA value for Proxmox backups are now displayed in the client and Comet Management Console web interface when viewing job details

Bug Fixes​

• Fixed an issue with Office 365 where restore of calendar events causes all event participants to be re-notified
• Fixed an authentication issue when upgrading Windows System Backup Protected Items from a legacy version of Comet Management Console
• Fixed an issue with "Login as user" appearing in the Comet Management Console web interface in cases where it is unavailable/non-functional
• Fixed an issue where Hyper-V/VMware restores to Proxmox were missing a network device
• Fixed an issue with IPv6 addresses being rejected when authenticating to Proxmox
• Fixed an issue in the Comet Backup desktop app allowing the "Edit" button to be clicked when editing functions are unavailable while editing an Office 365 Protected Item
• Fixed an issue in the Comet Backup desktop app preventing Office 365 Protected Item changes being saved in some cases
• Fixed an issue processing changes by administrators
• Fixed an encoding issue in the Comet Management Console web interface
• Fixed an issue processing changes by tenant administrators

Changes compared to 25.9.6

New Features​

Proxmox v9 support​

The Proxmox Protected Item type now supports backing up Proxmox version 9.

Enhancements​

• Changed Block Tracking can now be selected for Proxmox backups via the Comet Backup desktop app
• The storage ID list has been updated to display only valid IDs for the selected node when configuring a Proxmox to Proxmox restore

Bug Fixes​

• Fixed an issue causing Proxmox backups to flatten pre-existing snapshots
• Fixed an issue causing Proxmox restores to fail if a disk image file with the same name already exists
• Fixed an issue impacting the backup and restore of Proxmox VMs with TPM State drives
• Fixed an issue with missing VM notes after performing a Proxmox restore
• Fixed an issue with Proxmox mounted ISO restore encountering 'VM disk file was not allocated'
• Fixed an issue with incorrect warning logs produced during Proxmox backups while listing VM configuration files
• Fixed an issue where newly added disks were not included in Proxmox backups when selecting all disks for a VM
• Fixed an issue causing calendar listing to fail in Microsoft 365 when API issues occur
• Fixed an issue caused by incorrect path separators when generating the macOS client installer from a Windows Comet Management Console
• Fixed a cosmetic issue affecting the rendering of some tooltip content in the Comet Management Console
• Fixed a cosmetic issue causing some navigation elements in the Comet Management Console to render incorrectly at specific low resolutions

Changes compared to 25.9.5

Enhancements​

• The API response returned when triggering backup/restore jobs now includes a JobID field containing the ID of the newly created job. This is only included when the device running the job is running Comet 25.9.6 or newer

Bug Fixes​

• Fixed an issue with timing alignment in some scenarios causing scheduled backups not to start
• Fixed an issue with the Comet Backup agent failing to open Storage Vaults when multiple keys are present
• Fixed an issue in the Comet Management Console web interface causing the header for the size column to be formatted incorrectly in exported job history
• Fixed an issue in the Comet Management Console web interface affecting the human readable formatting of 'n/a' duration values in exported job history
• Fixed an issue leading to inaccuracies in SMB-backed Storage Gateway disk size reporting
• Improved the handling of failed message downloads during Office 365 backups by falling back to alternative retrieval methods
• Fixed an issue leading to incorrect date selections when configuring a monthly schedule in the Comet Backup desktop app
• Fixed an issue with future Deep Verify operations on a Storage Vault being blocked if multiple jobs tried to simultaneously initialize the vault on its first use

Changes compared to 25.9.4

New Features​

Option to enable user home directory sandboxing on Linux​

In Comet 25.9.5, Linux users now have the option to enable sandboxing of user home directories, with Comet backing up each home directory data as the owner of that directory and thus ensuring that permissions and ACLs are fully respected.

Changed block tracking for Proxmox protected items​

Changed block tracking (CBT) is now supported for Proxmox Protected Items, allowing for significantly reduced job times when backing up low-churn datasets.

Enhancements​

Improved the performance of Comet user APIs, particularly when the server is under load​

Comet 25.9.5 brings substantial under-the-hood improvements to the performance of APIs used in regular activities, reducing load on busy servers and increasing throughput of short-lived backup jobs.

Support for running multiple commands in a Program Output Protected Item​

Multiple streams of program output can now be combined into a single program output Protected Item, each with an assigned file name to be used upon restore, allowing for related sets of data to be configured and scheduled in unison.

Storage Template support for new Impossible Cloud regions​

Storage Templates can now be configured for Impossible Cloud's new West-2 and North-1 regions.

Tags for custom backup jobs​

Custom backup jobs started via the API can now have tags specified, allowing these jobs to be identified and retrieved by tag through the job history search in the Management Console and through the API.

Added APIs to get, update and delete Protected Items​

API users can now get, update, and delete Protected Items in isolation, without having to interact with the rest of the user profile.

Bug Fixes​

• Fixed an issue causing Windows Disk Image backups to fail on host devices with Windows Containers enabled
• Fixed an issue building device associations when creating custom Storage Vaults from the Comet Management Console

Changes compared to 25.9.3

New Features​

Proxmox backups and restores with non-root users​

In Comet 25.9.4, Proxmox backups and restores can now be run using a correctly configured non-root user.

Bug Fixes​

• Fixed an issue with process argument visibility when using the Comet Backup desktop application
• Fixed an issue with Comet attempting to backup external VSS snapshots in a Windows Disk Image backup