> > looks like initrd and/or udev > There were similar issues with upgrade from wheezy to jessie in my upgrades > as well. > I usually boot with usb stick and fix the initrd - you might need to > configure or reconfigure few things. the easiest to try is to recreate > initrd.
Yes, all the hints point to that, but I'm not sure I can do this alone without making a mess and with a machine containing several Terabytes of data I'm not allowed to :_) > But as you did not provide any information how system is setup regarding > lvm, its just guessing > It wasn't me to configure the machine in the first place so is a bit tricky. I can give more information if you can point me out what you could need. thank you a lot