Linked Questions

63
votes
6answers
784k views

How to fix "error: unknown filesystem. grub rescue> [duplicate]

I get this error: Error: unknown filesystem. grub rescue> I'm not exactly sure what I did. I believe I installed Ubuntu over Windows on my Acer netbook. I then tried to install Linux Mint, but it ...
23
votes
2answers
30k views

How to install Ubuntu 14.04/16.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system?

Update: Question and answer below also applies to Ubuntu 16.04 I have a computer with dual SSDs and Win (7) pre-installed on another disk. The pre-installation uses (U)EFI/GPT boot. I want to install ...
15
votes
3answers
48k views

How to install Ubuntu server with UEFI and RAID1 + LVM

I used to install my servers with LVM over software RAID1, and grub install on the MBR of both drives. Now I have an UEFI server, and the compatibility (BIOS) mode does not seem to work. So I went ...
5
votes
2answers
13k views

UEFI boot in virtualbox - Ubuntu 12.04

I am trying to boot Ubuntu 12.04 (64bit) by using UEFI in VirtualBox. When using UEFI boot in Virtualbox, I instantly get dropped into EFI-shell. I looked this up online and did as explained in this ...
4
votes
2answers
22k views

RAID set up in Ubuntu 18.04

I am trying to setup one of my servers with Ubuntu 18.04 server edition. When trying to do disk partitioning it does not allow me to choose Software RAID configuration (That open does not exist at all)...
1
vote
1answer
5k views

Ubuntu 17.04 will not boot on UEFI system with XFS system partition

I am trying to install Ubuntu on to a clean system and use XFS for the system partition. However it seems that my UEFI system does not like XFS. When installing I select 'something else' and manually ...
2
votes
0answers
8k views

RAID support in Ubuntu 18.04 Desktop installer?

I want to install Ubuntu 18.04 Desktop using a software RAID 1 configuration. I don't see any RAID option in the installer. I have found a question about RAID support in the server installer, but no ...
0
votes
1answer
982 views

Ubuntu 18.04 server install onto RAID1 with GPT/UEFI

I have installed Ubuntu Server 18.04 onto software RAID1 using the manual disk setup as described here: https://help.ubuntu.com/lts/serverguide/advanced-installation.html.en However, I would like to ...
1
vote
1answer
348 views

Ubuntu-18.04.2-desktop-amd64 installation fails on Lenovo p52: watchdog: BUG: soft lockup CPU#0 stuck for 22s1 (Worker/0:2:86] [duplicate]

I downloaded the Ubuntu-18.04.2-desktop-amd64 version and trying to install via USB key image on the following Lenovo P52 notebook. The notebook has been preformatted so no Windows on it. Notebook ...
1
vote
0answers
481 views

Recent instructions for mdadm RAID-1 and LUKS setup on UEFI systems

I have been trying to find a recent document on installing Ubuntu (18.04 preferred) using mdadm RAID-1 mirrors and LUKS underneath mdadm. The main point of using LUKS under the mdadm layer is that ...
1
vote
0answers
297 views

Ubuntu 18.04 Both Drives hang at boot on raid

I am having booting issues with Ubuntu on 2 hard drives. I built this rig with Nvidia i6800 motherboard, and 2 HDs, The reason for 2 drives is one is the main and the other is a backup. GRUB BOOTS ...
2
votes
1answer
130 views

Can I have RAID 1 with LVM and 4 drives on 18.04 LTS Server?

Can I create two LVMs with 2 drives each, totaling 4 drives, then set up RAID 1? The goal is to create two each 8 TB LVMs, then mirror them. I've read the following post and several others all over ...
1
vote
2answers
59 views

Understanding disk space partitioning

I have a dedicated server with Ubuntu Server 18.04 (256 RAM, 2x 240 GB SSD) and here's how the disk space allocation looks now: Filesystem Size Used Avail Use% Mounted on udev 126G ...
0
votes
1answer
64 views

Migrate MBR/BIOS RAID 1 root partition to GPT/UEFI with LVM

I have been pondering this for a while, and searching various posts, but can't find something that is aligned with my situation. I am running 18.04.3 LTS currently on a couple of SSDs in RAID 1 (...