Hello, About a 2 weeks ago using VirtualBox I started up a Fedora 36 Workstation, then start making a ruby on rails web app. This evening when I started up the project file I only got to emergency mode because the filesystem is not mountable. I did a quick google search on the error and found that the recommended action is to send the BTRFS email list the problem so they could help. So that's what I did. (attaching that email to this one) After sending the email I did continue to look for the answer online. I found the closest errors to my own were also Virtual Machines. Unfortunately, I found no solutions to my problem (in fact several never received answers even though they were asked in 2020 and 2021.) IMO: It looks like BTRFS and virtual machines do not play well together. Is there any way for installation files to detect the VM and option to different filesystem? Or at least give a warning. I wish this wouldn't have happened at all but I am certainly glad this happened at 1.5 weeks instead of 10 weeks into the project. Brian Clark Hello, I have a Fedora 36 Workstation running as a VirtualBox. This evening I started it up to the error above and is now sitting at an emergency boot prompt. I am going to have to type some of the needed information because the trouble system is not booted far enough to allow copy/paste. Linux Fedora 5.17.5-300.fc36.x86_64 ... btrfs-progs v5.16.2 Label: 'fedora-LIVE' uuid: ... Total device 1 FS size 5.1 GB devid 1 39GB used 6.52 GB path /dev/sda2 unable to mount device to get output Any help would be appreciated to recover the data. Thanks in advance, Brian S. Clark _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue