I had a power outage last night and my fancy new UPS apparently didn't work and after reboot, my cache drive is unmountable. However, if I take the drive out and connect it to another computer running Ubuntu, it mounts just fine and all of the files are visible.
My problem seems very similar to https://forums.unraid.net/topic/143887-cache-drive-umountable/
And I see others have had good results following the same steps, but since the drive seems to work just fine in another computer, I wonder if my issue might be a little different. And since I don't really know the consequences of running some of those commands like sfdisk with 2048 and write, I'm worried about losing the data I do have.
Any guidance on what is the best course of action?
Specifically /dev/sdj is the drive in question.
jasper-diagnostics-20250207-2137.zip