Attempt to read or write outside of disk ‘hd0’

Asked by Luis M.Jacinto on 2021-02-19

Installing 4 times Ubuntu 20.04 and after few days when Booting it stops
with errors and one is “Attempt to read or write outside of disk ‘hd0’”.
I use live USB 20.04.1 and install and run Boot-Repair it reports the following.
“Please disable BIOS-compatibility/CSM/Legacy mode in your UEFI
firmware from live-CD (or live=USB) that is compatible with UEF booting mede.
For example use a live-USB of Boot-Repair-disk-64bit”
Don't know what I should do can some one explain and help me fix this.
Thank you

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Is this a dual boot or is Ubuntu the only OS on the system?

Luis M.Jacinto (ljacinto) said : #2

Ubuntu only OS

Did you try to install with compatibility mode in the BIOS (legacy) as well as secure boot?

Luis M.Jacinto (ljacinto) said : #4

No I didn't it was just insert USB stick and install, do I have to reinstall?
Need directions to modify the BIOS.

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