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Last night I was working on my computer and it froze. I think it's graphic card related, I do have an Nvidia card. So I rebooted the computer as I had no other option, but now it boots to emergency mode.

In journalctl -xb there are some errors. Other then this I am out of my league here guys. Should all these errors be fixed?

Systemd[1]: failed to apply kernel variables  
Sudo[17755] pam_systemd(sudo:session): failed to connect to system bus: no such file or directory found.
kernel: EXT4-fs (md0): can’t find ext file system.
Failed to mount /data01
Edac abridge: cpu srcid #0, ha #0 has dimms, but ecc is disabled.
Edac: couldn’t find mci handler
Edac: failed to register device with error -19
Systemd-udevd[1422]: failed to execute ‘/usr/lib/snapd/snap-device-helper’ ‘/usr/lib/snapd/snap-device-helper add snap_pulseaudio_pulseaudio /devices/pci0000:00
KVM disabled by bio
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I solved the issue! I had to create the RAID volume. First create the RAID:

mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sdc /dev/sdd /dev/sde
mkdir /data01

Mount the file system

mount /dev/md0 /data01

Now inspect your /etc/fstab, make sure things make sense in there.

vi /etc/fstab /dev/md0 /mnt/raid5 ext4 defaults 0 0

In my file I had to change the second column from x to /mnt/raid5.

Then I rebooted and it worked.

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