Hello Everyone,

I am unable to install Ubuntu 18.04 on the Dell Server R6525. If I use the Server Edition the Installation will be stuck at detecting the Disks and will the error as below. Because of this OS installation did not proceed further.

Block probing did not discover any disks big enough to support guided storage configuration.
If I use the Desktop Version Ubuntu 18.04 OS will be installed without any issues. However on the first boot itself I will get a Grub error.

error: attempt to read or write outside of disk 'hd0'.
Entering rescue mode...
grub rescue>
Tried fixing the grub issue with the Ubuntu Boot Repair and the outcome of it is successful but server won't boot into the OS not even for once and the grub issue is repeated.

Outcome of the Grub Issue: Link

However if I use the Ubuntu 20.04 LTS, OS installation is successful and I am able to login to the system without any issues.

Ubuntu Support: Link

The Server having the Dell PERC H755 Card.

Anyone can advise me how to install the OS in this server?