Hi [NAME],   I think this is the only document that is published: [URL] If you look at page 5, at the bottom right table.   Have you tried downloading the ISO from Ubuntu website tailored for R440? [URL]    
I have a few PE R440 going for RAID10, but there is an error when we're trying to install Ubuntu. The installation is with a bootable USB stick carrying vanilla Ubuntu 20.04.3 image. [IMAGE] We have checked the RAID properties, the RAID10 properties seems fine. [IMAGE] But the PERC dashboard view says "Needs attention", I couldn't find further details, only see the 4 physical disks seems okay. [IMAGE] We have 3 more R440 w/ PERC750 servers all encountered with the same issue. One of them were status ready on the PERC dashboard, but after a reboot attempt, it became "Needs attention" like others. Is there anything we can try to fix this?   And another question about supported OS version, we also tried Ubuntu18.04 but the server didn't show the disk available for use, is it because H750 don't support Ubuntu18.04? Thanks!
PERC showing status "needs attention" and Ubuntu installation keep failing.