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I have simply replaced all of my mdadm array hard drives with some larger drives. I then went to reboot the system and upon booting it comes up with a grub error. I'm not sure what is needed to be done to the mdadm drives to get them to boot properly? I followed all instructions and partitions are all the same, data is all the same, but it still will not boot up properly.

I've attempted to grub2-install, boot into old RAID drives, etc. Nothing has worked. Any ideas?!

Derek Edwards
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  • Well, what is the grub error? The error usually gives you important details to find the problem. The fact that you are getting a grub error tells you grub is installed. – Zoredache Oct 06 '21 at 21:46
  • UUID needed to be reconfigured for the mdadm RAID /boot record. I defined this within the rescue mode to allow it to boot up. Then did a dracut in rescue as well to rebuild. All good after that. – Derek Edwards Oct 06 '21 at 23:05
  • Doesn't seem like you should have to configure that, but I suppose it depends on the specific method you followed when setting up the new drives. – Zoredache Oct 06 '21 at 23:10
  • It's because originally the UUID was used for the /boot partition & when replacing the drive the UUID changes – Derek Edwards Oct 07 '21 at 18:22

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Resolved by changing UUIDs in /etc/fstab for the new drive. Then ran dracut to make sure everything was proper.

Derek Edwards
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