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Unable to find Microsoft Hyper-V VSS Writer. Verify that Hyper-V services are running on the client server.
SUMMARY Hyper-V agent did not find a writer: Microsoft Hyper-V VSS Writer; Unable to find Microsoft Hyper-V VSS Writer. Verify that Hyper-V services are running on the client server. ISSUE Inventory sync failing stating Hyper-V VSS not enabled on Hyper-V host WBPS logs show <Error> Unable to find Microsoft Hyper-V VSS…
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NAS backup fails with error: "Stale file handle"
SUMMARY Backup fails with the error: "Stale file handle" on a CentOS 7 appliance while performing a NAS backup via CiFS share. ISSUE Backup fails with the error: "Stale file handle" on a CentOS 7 appliance while performing a NAS backup via CiFS share. ERRORS/WARNINGS encountered:ctar: cannot open /mnt/nas/<Folder…
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Communication failure occurred during finalization of backup process
SUMMARY How to recover from a communication failure that occurred during the finalization of the backup process. ISSUE The backup ran for the normal length of time, transferred the amount of data expected and appears that it should have completed successfully however the backup indicates it failed with the error…
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How to delete a range of backups
ISSUE Use these steps to delete a range of backups. RESOLUTION Navigate to the Recover – Backup Catalog tab and follow these steps: * Use the filters to select your date range. -- Try a range of a month. * Select the checkbox beside the protected asset for which you would like to remove backups. * Then, select the Delete…
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Error: App aware snapshots enabled, but failed to create guest snapshot. Aborting backup.
SUMMARY Failed to connect with guest for guest vss operations. There was an error in communication. ISSUE This article applies to VMware 6.5. AppAware backups failed to create a snapshot for VMware 6.5 virtual machine. RESOLUTION Upgrade the Unitrends system to version 9.1 or higher for VMware 6.5 support. CAUSE Unitrends…
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10.1 error "invalid input detected for aliases"
SUMMARY Unable to create Alias for any client with any input via webUI in 10.1. Editing /etc/hosts manually, from command line, works as expected. ISSUE Unable to create Alias for any client with any input via webUI. Editing /etc/hosts manually works as expected. Error in /var/log/httpd/ssl_error.log when clicking…
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SQL backups leave partial files after backups
SUMMARY SQL differential backup terminates abnormally leaving partial files unnecessarily consuming space. ISSUE SQL differential backup terminates abnormally leaving partial backup files. RESOLUTION There are two approaches to correcting this issue. Either, the underlying VSS errors can be addressed or the Unitrends agent…
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Nutanix AHV missing from UI
SUMMARY 10.1.1-3 installed but unable to see option to add Nutanix in UI ISSUE Customer completed update to 10.1.1-3 but is not able to see Nutanix AHV Hypervisor option when adding Virtual Host RESOLUTION Confirm showAHV=true is set under the CMC section of master.ini or via General Configuration of UI Configure >…
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Backup Failure exit code 40 - VSS snapshot settings has been manually disabled in master.ini file
SUMMARY This article will discuss the steps to recover from a "VSS snapshot settings has been manually disabled in master.ini file" error exit code 40 ISSUE File level and SQL backups fail with "exit code 40" and produces warnings stating "VSS snapshot settings has been manually disabled in master.ini file". RESOLUTION *…
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CBT Driver error occuring when backing up a VM with a disk that was previously attached to a different VM
SUMMARY This article explains how to resolve a Hyper-V CBT error that can occur when backing up a VM to which you have attached a disk that previously attached to another VM protected by your Unitrends appliance. ISSUE Issue If you detach a disk from a VM protected by a Unitrends appliance and then attach this disk to a…