| TheProf | Hello. I am having some difficulty getting Ubuntu Server 24.04 to install on my machine with the drives in Linux RAID configuration, and I am looking for help please. I followed several guides online to set up the RAID during installation, and the installation ends with a 'successfully installed' message, but upon reboot the BIOS reports No Bootable Media Found. I've reinstalled three times and | 03:45 |
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| TheProf | get the same error. How can I determine the issue and solve this please? | 03:45 |
| blahdeblah | TheProf: What disk layout did you use? Can you link to the guide which most closely matches what you did? | 03:58 |
| TheProf | @blahdeblah, hello. I can describe my layout and link the guide sure. Server has 8x1TB drives. So I set / as RAID1 on two drives, and /home on RAID5 on 4 drives, with 2 hot spares. Let me try to find the guide I used | 04:04 |
| TheProf | Here is the link: https://tonyfernandeztech.wordpress.com/2021/04/27/installing-ubuntu-20-04-with-software-raid-1/ One change I made was not to include /boot within the RAID1 as I had seen it doesn't work as /boot is needed before the RAID is mounted so I kept /boot outside | 04:06 |
| patdk-lap | hmm, bios wont understand raid, though these days you should be using uefi | 04:07 |
| patdk-lap | that guide is not using uefi, not pretty | 04:08 |
| TheProf | I'm using an older server and I'm not familiar with UEFI at all. | 04:09 |
| patdk-lap | I had to change to uefi with 22.04, but forget if it was cause of 22.04, or something else I was doing | 04:10 |
| patdk-lap | oh, I think it was my motherboard wouldn't boot from my m.2 unless I used uefi | 04:10 |
| patdk-lap | unless your server is >10years old, it likely does uefi | 04:10 |
| patdk-lap | but that is kindof a different thing, but becoming more and more required though | 04:11 |
| TheProf | @patdk-lap, it is around 11 or so years old and was donated to the school | 04:12 |
| TheProf | The machine has a hardware RAID controller, but when I try to use hardware raid to create the drives, the Ubuntu server installer doesn't see any drives whatsoever. And using software raid doesn't seem to work so I am stuck. | 04:18 |
| TheProf | If it is better to just wipe and reinstall I can do that, but what is the correct way to install for software RAID during installation? Do I need to have /boot outside the RAID? | 04:26 |
| patdk-lap | I always put /boot on raid1 | 04:27 |
| TheProf | @patdk-lap, OK so during installation when I go to custom / manual storage configuration, what do you do next? Do you specify /boot on the raid in a certain way? | 04:29 |
| patdk-lap | only if the system is so old it can only boot on drives smaller than 4gig or 8gig or something | 04:30 |
| patdk-lap | otherwise, I dont bother making /boot it's own raid1 | 04:30 |
| TheProf | OK - can I just tell the installer to set up RAID1 and put / on it and it will also include /boot by itself? | 04:31 |
| patdk-lap | yes | 04:32 |
| TheProf | OK so I can ignore what that guide is saying then? I don't need to specify a separate partition for /boot and SWAP? | 04:33 |
| patdk-lap | well, swap depends | 04:34 |
| patdk-lap | I dont like using swap files, so I use a seperate partition for swap | 04:34 |
| TheProf | The server has 40 GB of RAM so I feel it isn't needed? | 04:34 |
| patdk-lap | but do whatever you want, dont matter | 04:34 |
| patdk-lap | dunno, if 40gig is enough for you | 04:35 |
| TheProf | Oh yes. The previous server which ran for years had 16 GB and never went to swap | 04:35 |
| patdk-lap | I'm eating 40gigs of swap with 160gigs ram :( | 04:35 |
| patdk-lap | no idea why it is even using swap, it doesn't run anything | 04:35 |
| TheProf | I'll give this a try now as I've been ripping out my hair for three days trying to get anything to install on it. | 04:37 |
| patdk-lap | the only HARD part to set that all up, is grub | 04:37 |
| TheProf | Is grub able to be in the RAID as well? | 04:38 |
| patdk-lap | no | 04:38 |
| patdk-lap | you need to set it up on each drive | 04:38 |
| patdk-lap | and everytime grub updates, make sure it updates each drive | 04:38 |
| TheProf | OK so that's probably what is happening here. | 04:38 |
| TheProf | Do I need to set up grub on the drives which are part of the /home RAID5, or only the / RAID1 which I'm going to mark as boot devices? | 04:43 |
| patdk-lap | grub needs to be setup on any drive you want to boot from in the bios | 04:50 |
| TheProf | OK | 04:51 |
| TheProf | OK so this is weird. I think I figured out what was happening with the raid controller. I checked just to make sure and the controller in the server is an PERC H310, which is specifically listed as supported by Ubuntu server OS. But every time I tried it, the installer would hang during boot with all these weird errors. So I finally figured it out. The issue is the global hot spares. Ubuntu | 05:24 |
| TheProf | server installer will crash if global spares are set in the controller. I didn't set them this time and everything worked perfectly. | 05:24 |
| TheProf | Not sure why setting the extra drives as global spares causes the installer to crash but when I didn't, it worked great. Maybe I can set them as spares after the installation is complete. | 05:27 |
| TheProf | I don't understand the error but during the installer boot-up it would repeat something along the lines of 'dmar rma read no_pasid request device PTR read access is not set', for what it is worth. | 05:30 |
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