![]() ![]() You create a file backup of your machine (or the single *.ost-file) using NovaBACKUP and the backup job option for "Enable Open File Backup" is being utilized.You are using Microsoft Outlook and set it to keep a local copy of your items on your computer ( Offline Outlook Data File *.ost ).NOTE: It would be better practice to disable the option "Enable Open File Backup" in your backup job and then exit out of Outlook / Skype so that the *.ost file is no longer actively being used by that software and then complete your backup with those programs not running, to be able to have the *.ost file contained in your backup set. This means that you do not need to back up *.OST files since you will get a fresh copy from the email server the next time you connect. Since it is a cached version of your mailbox data even if that *.OST file were to be deleted it will be rebuilt the next time you connect to Exchange / Office 365 via the Outlook email client. In most cases the need to backup a *.OST file is not necessary as these files are merely cached copies of online mailboxes in Exchange or Office 365. Know that this is not supported in any way by NovaStor and the NovaStor Support team cannot support you on these matters. It is not recommended to attempt to backup an open *.ost file using VSS, however this is a workaround for those that want it. ost files from being able to be backed up with VSS if that registry setting is in place. Because of that, NovaBACKUP's functionality for backing up open files is being trumped by Microsoft's choice to disable. The reason why *.ost files will fail to backup in this case is that by default Microsoft disables *.ost files from being able to be backed up using normal methods and this is a forced setting that they have placed in the windows registry. By default NovaBACKUP uses VSS (Microsoft's Volume Shadow Copy Service) via an option in the backup jobs called "Enable Open File Backup". This will affect users running NovaBACKUP under Windows Vista and above for workstation OS's and Windows Server 2008 and later for Server OS's, since Microsoft chose to exclude certain files from shadow copies including *.OST. It contains a dozen different strategies and may help you resolve the problem in just a couple of minutes.This is a workaround for failure to back up *.OST file if VSS (controlled via the "Enable Open File Backup" backup job option) is enabled in your file backup job. Please also look into our Volume Shadow Copy Service Error Troubleshooting Guide for additional clues. Please collect as much information as possible and email the exported Event Viewer logs to our support for further investigation. The following example shows that the virtual machine’s Hyper-V Integration Services are not available or installed: You will find about a dozen different Hyper-V logs and more often than not you’ll find the answer to your problem right there. If you are using Hyper-V, you may find additional Hyper-V VSS error information by navigating further down to:Īpplications and Services Logs -> Microsoft -> Windows -> Hyper-V XXXXXXX Most of the time, however, the way to fix the error becomes obvious when reading the error message, see the following Hyper-V example: You basically use the Event ID and Source in your search to find additional information online on how to fix your particular error. It also helps to run search using your favorite search engine and search for: VOLSNAP 27 or VSS 8193. What you need to do next if you are using Hyper-V, is to check the Hyper-V logs (following section). Look for Disk, VSS, and VolSnap entries occurring at the time of backup or approximately the time when the error is reported in BackupChain: ![]() Open the Windows Event Viewer and check the Windows Logs, Application and System. ![]() It automates most of the steps shown below. If you encounter VSS failures in BackupChain, you’ll need to check the Windows Event Viewer as follows: Download our freeware VssDiag™ tool which helps you find and fix VSS errors. In order to fix Volume Shadow Copy Service (VSS) errors in your system, and before you dive into the details of our Volume Shadow Copy Service Error Troubleshooting Guide, you need to know exactly what causes these errors in your system. ![]()
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