macrium reflect unable to dismount volume

Might be worth trying if you haven't already though, but note that the downside of specifying a backup target by disk ID is that it precludes setting up a disk rotation, which again is the superior solution anyway. I also think writing the necessary code to figure out which unmounted disk to mount and which drive letter to assign to it would be more effort than it's worth for the developers, especially since after all that effort your protection against ransomware still isn't nearly as good as setting up a disk rotation of external disks that involves physically disconnecting them, which is what I've implemented partially for that concern and also to facilitate off-site storage to protect against natural disasters.Īll that said, Reflect does have an option to detect backup target by disk ID rather than drive letter, and since that's visible even when no drive letter is assigned and there's nothing preventing an application from writing to a disk that doesn't have a drive letter assigned, theoretically Reflect could write a backup job to that disk without ever mounting it - but I don't know if it does. people ticking this box in a the Reflect GUI in the name of security and later on wondering where their hard drive went after a backup completed.

I personally think the feature you suggest would lead to too much confusion even if it weren't on by default, e.g. For example, early on users were able to recover from ransomware restoring from Previous Versions courtesy of local VSS snapshots (a feature I'm still annoyed was removed from client versions of Windows after 7 and now only available when paired with a File History target.) - but ransomware developers caught on and responded by blowing away VSS snapshots. I suppose if the concern is ransomware, having a disk unmounted (I assume you mean just un-assigning the drive letter?) is better than not, but that also has you banking on ransomware not being smart enough to catch on to your ruse, which historically has not proven a safe bet.

Macrium reflect unable to dismount volume