Installed this on my 2nd SSD. However I had an issue with not being able to get grub to show up, so i deliberately overwrote the bootloader with windows and planned to add manjaro to the windows dual boot menu (with easybcd: had issues getting to work however).
Anyway for the past couple of months I've used Super GRUB2 Disk to boot without any issues.
However last night my KDE installation crashed. After rebooting super GRUB2 Disk doesn't detect any Manjaro installation. Infact the drive isn't even listed: also windows disk management doesn't even detect the drive.