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Disks offline after a Hyper-V IR - Connect IT Community | Kaseya
<main> <article class="userContent"> <h2 data-id="summary"><strong>SUMMARY</strong></h2> <p>Some Guest VM disks go offline after a Hyper-V IR has completed.</p> <h2 data-id="issue"><strong>ISSUE</strong></h2> <p></p> <h3 data-id="purpose">Purpose</h3> <p>To explain how to resolve an issue where disks are offline for some Windows servers after they are recovered through Hyper-V instant recovery in audit or instant recovery mode.</p> <h3 data-id="description">Description</h3> <p>This problem occurs only when performing a Hyper-V instant recovery. (It does not occur when performing a VM restore.) It affects only Windows server VMs meeting all of the following criteria:</p> <ul><li>The servers have multiple SCSi controllers.</li> <li>Multiple disks reside on each controller.</li> <li>The location number for a disk on one controller is the same as the location number for a disk on another controller.</li> </ul><p>For example, a Windows server with the following disk configuration would be affected:</p> <ul><li>SCSi controller 1 with disks residing in locations 1, 2, and 3.</li> <li>SCSi controller 2 with disks residing in locations 1, 4, and 5.</li> </ul><p>After the recovery, all three disks for SCSi controller 1 would be online, and disks in locations 4 and 5 for controller 2 would also be online. However, the disk in location 1 on controller 2 would be offline.</p> <h3 data-id="resolution">Resolution</h3> <p>You can resolve this issue by accessing Disk Management on the server VM, right-clicking on the disk in an offline state, and then clicking <b>Online</b>. Procedures may vary slightly depending on the server version.</p> <p> For more information about Hyper-V instant recovery, see <a rel="nofollow" href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Fwww.unitrends.com%2Fdocuments%2Flegacy-rs-ueb-admin-guide%2Fdefault.htm%23cshid%3D1513">Instant recovery for Hyper-V</a> in the <i>Unitrends Recovery-Series and UEB Adminstrator’s Guide</i>.</p> </article> </main>