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Questions tagged [grub]

Console application permitting the user to choose between several installed operating systems.

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EC2 AMI instance store backup grub utility required

Working on backup of whole ec2 volume and image to upload to s3. Using RHEL7 and it internally uses Grub2 as bootloader. EC2 AMI tools requires grub legacy loader and I'm struck up in this loader. When i run ec2-bundle-vol, Stacktrace is as…
Sva
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How can I determine if nohz=off (CentOS 6.4 64bit - Hyper-V)

I've edited /boot/grub/grub.conf and added nohz=off to the command line of the default kernel. I do not see any difference, kernel is compiled with 1000Hz, but when I test with the following…
Vincent De Smet
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xvd device support with Gentoo running in Xen HVM guest

I'm trying to install Gentoo into a Xen HVM guest. Everything went fine with the install up to the point where you do the grub-install. Apparently, grub does not know about block devices labeled "xvd" (see…
John P
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How to boot GRUB2 so it mounts "root" on a different drive (remote server without KVM switch)

Summary: I created a copy of the root file system on a RAID array (with one disk on it), I tried to get the system to boot off that newly copied drive. Background: 2 disks of the same size in server (sda, sdb) sdb not being used I tried to…
timh
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How do I mount a raid disk

So I screwed up my grub.conf file on a CentOS system and I'm in recovery right now (it's only a test dedicated server). My disks are /dev/sda1 and /dev/sdb1 (RAID 1). Now I need to mount /dev/sda1 and make changes to the grub file, however those…
Devator
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Why does 'aptitude safe-upgrade' cause Ubuntu's boot to hang on "Waiting for root file system"?

I launched an Ubuntu EBS instance on Amazon EC2 using the Ubuntu's very own latest AMI for 10.04 Lucid, ami-ad36fbc4` After getting the instance up, I ran the command sudo aptitude safe-upgrade which seems to have upgraded the kernel from…
cwd
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EC2 issue using PV-Grub and custom kernel: error 21 selected disk does not exist

Over on EC2 I am trying to setup AMI's for PLD-Linux that use the new features that allow running custom kernels from inside the AMI using PV-Grub. I've setup custom AMI's many times before but can't get the kernel thing to go. Basically I have a…
Caleb
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Getting Grub2 to recognize a Raid 10 boot/root

I've been trying to get my raid to boot from grub2 for about 2 days now and I don't seem to be getting closer. The problem appears to be that it doesn't recognize my raid at all. It doesn't see (md0) etc. I'm not sure Why or how to change this. I'm…
xenoterracide
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linux kernel option to set sata disk to udma/133 1.5gbps

i try to speed up boot time of my linux server box which uses removable HDD rack's the current boot time is around 2 min's but if i connect the hdd's directly to the mainboard its about 2 sec's the problem is that ahci's kernel implementation causes…
John Doe
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arch linux on zfs root cannot configure grub on bios

as the title suggests I cannot get across the finish line installing arch on zfs. I get to the point where I try and install grub on my /boot after chrooting into my /mnt from the live cd. anyway here is my command and error: # nvim…
posop
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How do I make grub install on a software-raid disk?

I am running Debian 9 with mdadm RAID 1 on it. Previously both hard-drives could boot into the OS, now only one of them can. I have recently had a faulty disk which needed to be replaced, so replace it I did. First, I ran mdadm --add /dev/md0…
Oleg
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How can I generate/or edit a grub.cfg on each EFI partition that refers to the ubuntu installation on the same physical disk?

I have an install of Ubuntu 16.04 server set up on two disks with software raid across two large partitions. The start of each disk contains an EFI partition. I would like to be able to boot from either disk (in case one fails) - one guide I read…
ezekiel
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Are my EFI partitions mutually bootable? How to interpret the output of efibootmgr -v

I have two GPT formatted disks both starting with EFI partitions and followed by a single physical raid partition. I installed ubuntu-server 16.04 with software raid over these two raid partitions and once it had installed, I cloned the EFI…
ezekiel
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How to install grub on a completely empty hard drive?

Normally, there are solutions available out there to restore grub or install grub provided that linux in installed first. How can I install grub while not having any partition which has an installed linux operating system. Is it even possible to…
Uthman
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How can I boot from .iso images stored on the harddrive?

I want to put a .iso file of a bootable linux CD on the harddrive of my computer. I want to have it boot using grub (or lilo), and have it boot from the .iso file as if the .iso was a real CD in the CDROM drive. Here is a page that makes reference…
user29701
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