A few days ago, I shut down my server because I needed to physically move it, after which it wouldn't boot anymore. When starting up, I get the motherboard logo, but after that I just see a gray screen. No "border" as some people see. It doesn't boot after 6 minutes as some people say on other forums that I've searched on to find a fix. No loading circle. Nothing but gray. No keyboard inputs worked.
In my search to fix it, someone on a similar forum post gave a link where they started thier fix by going into grub by booting and pressing shift while seeing the motherboard logo. So I did that, and it said Launching/Starting (can't remember) grub... However after that I see nothing, which is contrary to You should see the GRUB menu after the BIOS loads. Just gray. So I assumed that grub was the problem.
In my search to fix grub, I found this link. In the first step, I need to mount my ubuntu install. However, my ubuntu install isn't a basic one.
When I installed Ubuntu, I chose to setup the drive as an lvm and later added a second drive to that. So on my system, I have two physical drives and one virtual drive (the lvm) on which Ubuntu is installed. The lvm is called "/dev/vgubuntu/root" but also "/dev/mapper-something" at some places. This isn't my flavor of technical knowledge so I don't understand everything. I just managed to set it up and it worked perfectly. Drive 1 is 1tb and drive 2 (added later to the lvm) is 750gb.
Mount the partition your Ubuntu Installation is on. If you are not
sure which it is, launch GParted (included in the Live CD) and find
out. It is usually a EXT4 Partition. Replace the XY with the drive
letter, and partition number, for example: sudo mount -t ext4
/dev/sda1 /mnt.
sudo mount -t ext4 /dev/sdXY /mnt
GParted only shows the first drive as /dev/sda5 but not the second. And when opening the gui-files thing when using a live-usb, it shows the lvm as /dev/md-0.
Doing the following shows an error:
sudo mount -t ext4 /dev/sda5 /mnt
#and this too
sudo mount -t "lvm2 pv" /dev/sda5 /mnt
lvm2 pv is what GParted showed for /dev/sda5. However, /dev/sda5 is not what I want to mount. It's the complete lvm, if I'm correct.
It's just becoming confusing and I don't know what I'm doing.
Simply said: Help! I don't know what I'm doing or what I need to do. I'm stuck!
P.S. yes I've booted a live usb and copied all important files and scripts to a usb and backed those up. So I COULD just reinstall ubuntu and install everything again. However, I have 1.5 tb of media that would take days to redownload and software that is working perfectly and was very hard to setup in such way. So I strongly prefer to fix it instead of just reinstalling ubuntu.
