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Hyper-V guest becomes unavailable during backup - Connect IT Community | Kaseya
<main> <article class="userContent"> <h2 data-id="summary"><strong>SUMMARY</strong></h2> <p>Hyper-V guest VM may become unavailable during backup</p> <h2 data-id="issue"><strong>ISSUE</strong></h2> <p></p> <h3 data-id="purpose">Purpose</h3> <p>Enable online backups of Hyper-V guests</p> <h3 data-id="description">Description</h3> <p>When a backup initiates, the Hyper-V guest becomes temporarily inaccessible.</p> <h3 data-id="cause">Cause</h3> <p> There are several requirements to perform online backups of Hyper-V guests. If these requirements are not met, there can be brief unavailability of the guest while backups are running.</p> <h3 data-id="resolution">Resolution</h3> <p>Make sure the following requirements are met on the guest VM:</p> <ul><li>Integration services must be installed and running on the guest</li> <li>VSS snapshot storage on host must be on the same volume as your .vhd/vhdx files</li> <li>Guest disks must be basic, not dynamic</li> <li>Guest file system must be NTFS</li> </ul><p>Note that if these requirements are not met, backups should still run successfully. However, the guest will most likely become temporarily unavailable.</p> <h3 data-id="third-party-sources">Third-Party Sources</h3> <p> </p> <p> </p> </article> </main>