@pierrebrunet I ran the normal delta backups to S3 using fix_alias_vhd and it runs again (full and delta).

@Emmanuel-V In my opinion, it would make more sense if a standalone disk exported in VMDK format were exported directly as monolithicSparse, so that it would not need to be converted. This makes more sense to me because when only the disk is exported, rather than the entire VM (OVA), it can be assumed that the disk will be attached directly to some VM.

Hello @mike.potapov , We found a race-condition happening on Qcow2 driver that explains this issue. We developed a fix that will be ship in the next release of blktap.

@acebmxer Very interesting. Thanks for sharing! I will wait until Veeam issued a new (hotfix) release before evaluating Veeam as a replacement for Xen Orchestra Backup.

Hello all, Version 9.2.385 Release of the Windows guest tools has been released. Download the latest release here: https://github.com/xcp-ng/win-pv-drivers/releases This release brings important bug fixes to the Windows drivers, installer and XenClean. Important note for users upgrading from 9.2.350: You must first install the included XenTools-fix-9.2.351.msp hotfix to upgrade to 9.2.351 before installing 9.2.385. Otherwise, upgrades from 9.2.350 will be blocked. Reboot is not required after installing the hotfix. To download XenClean, click here. The installer downloads also includes a copy of XenClean and XenBootFix. It is not necessary to run XenClean when upgrading from previous versions of the XCP-ng Windows guest tools, unless prompted by the installer. Remember to carefully read XenClean docs before use. Note: Always download the latest XenClean/XenBootFix from https://github.com/xcp-ng/win-pv-drivers/releases Before installing Thank you for using our Windows PV tools. Please carefully read the instructions below. It is not necessary to run XenClean when upgrading from previous versions of the XCP-ng Windows guest tools, unless prompted by the installer. Not compatible with the "Manage Citrix PV drivers via Windows Update" option. You must disable this option before installing. Changes since 9.2.350 Improved: Update XenClean to .NET 10. XenClean is now a native binary that no longer requires .NET Framework. Fixed: Fix data corruption issue during in-memory snapshots and backups. Fixed: Fix DLL sideloading issue in XenClean. Fixed: Fix driver migration during upgrades. Fixed: Fix display of IPv6 addresses in Xen Orchestra in some situations. Fixed: Reliability and stability fixes for the drivers and guest agent. Help / Community support If you encounter installation/uninstallation errors, please try again with one of the following commands: For installing: msiexec.exe /i XenTools-x64.msi /l*vx install.log For uninstalling: msiexec.exe /x XenTools-x64.msi /l*vx uninstall.log Please include this log along with the file C:\Windows\INF\setupapi.dev.log in your bug report. These files will help us troubleshoot any installation issues. Additionally, please report any errors or BSOD you encounter during testing of this release. Your feedback is very appreciated.

@florent & @poddingue I now have to heap snapshots. Could you provide somewhere to upload them, please? And I will do so as soon as I can.

I do have active directory setup in my lab environment. I just need to set aside some time to try it out between two domain joined hosts. Thanks for trying that! That's some good debugging.