May 30, 20206 yr Hi there. Unraid 6.8.3 Windows 10 VM running well with 60GB of space. I wanted to increase VM disk space, so I shut down the VM, selected it, increased size from 60GB to 100GB, restarted. Windows> Disk Management> selected c:> expand volume - this option was greyed out. It showed 1. 100MB partition. 2. C 3. Healthy Recovery 4: unallocated. I searched around and tried a few options (restart, create new volume from 4, etc. and had no luck. At point one (the last point?) I right clicked on "C" and selected "Active Partition". The warning came up "if there's no OS you may not be able to boot". I continued, with the intention of switching "active" back to the "100MB" partition. In the intervening few seconds, I tried to "expand volume" on C to see if it would work. I then restarted BEFORE I set the 100MB back to "active". 100% my mistake. So now on VM boot I receive a "BOOTMGR is missing" warning, press ALT CTRL DELETE which is just a boot loop. Searching online suggests using a bootable Windows recovery DVD or USB, booting from that, and then selecting the 100MB as the active partition. With my installation being a VM, I'm not sure how to do this. I've searched the forums and reddit and so far the solutions for similar error have not worked (changing virtio, pressing a key to access a different Boot selection. Any/all advice would be helpful. And, if I must recreate the VM, that's fine, too. I won't lose any data, would just rather fix than start over. Thanks so much.
September 11, 20205 yr Were you ever able to fix this? I'm having the same problem with one of my VMs. In my case, I expanded the volume and everything was working properly. However, once I rebooted, I started getting the BOOTMGR is missing message. Edited September 11, 20205 yr by yyc321 Additional info
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