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VMware Backups Fail with FileAlreadyExists Error - Connect IT Community | Kaseya
<main> <article class="userContent"> <h2 data-id="summary"><strong>SUMMARY</strong></h2> <p>Inform users about VMware Virtual Machine (VM) Backup failures because of not being able to create snapshots and FileAlreadyExists errors.</p> <h2 data-id="issue"><strong>ISSUE</strong></h2> <p></p> <p>The Backups of one or more VMs fail due to the inability to create snapshots. Unitrends needs to create snapshot of a VM in order to perform the Backup of the same. If there are some errors thrown from VMware/ESX Host side during this operation, then Unitrends fails those Backups. <i>FileAlreadyExists</i> error is seen in the Backup error messages.</p> <p>For more detailed information on backup failures and performance issues see <a rel="nofollow" href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Funitrends-support.zendesk.com%2Fhc%2Fen-us%2Farticles%2F360013174757">Unitrends KB 5062 - Backup Failures and Performance Issues</a></p> <p> </p> <h2 data-id="resolution"><strong>RESOLUTION</strong></h2> <p></p> <p>To resolve this issue:</p> <ul><li>Locate and manually rename or move the “-delta.vmdk” file that does not have an associated descriptor file.</li></ul><p>For more information on the steps, refer to the following <a rel="nofollow" href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Fkb.vmware.com%2Fselfservice%2Fmicrosites%2Fsearch.do%3Flanguage%3Den_US%26cmd%3DdisplayKC%26externalId%3D1008058">VMware KB</a>.<br><br> </p> <h2 data-id="cause"><strong>CAUSE</strong></h2> <p>This can happen if “-delta.vmdk” file already exists in the inventory for that VM. When the ESX host tries to create the snapshot, it first creates the new descriptor file, then creates the associated “-delta.vmdk” file. If the ESX host detects that a “delta.vmdk” file with that name already exists the snapshot operation fails and the virtual machine reverts to its previous state.</p> </article> </main>