Software raid 1 grub2

Therell be a list with sda, sdb tickyboxes and other entries which are not recommended. When i perform a software raid 1 or raid 5 installation on a lan server with several hard disks, i wonder if grub already gets installed on each individual mbr, or if i have to do that manually. In my testing, lilo absolutely refused to be installed on a raid1 array. If the mdadm command is not available, install it using yum command. I see that there is a lot of people interested in using clonezilla for raid config, so maybe this is helpful. The raid will be a linux software raid managed by mdadm. Also, when i tried and removed the second sata drive devsdb after a shutdown.

Hence, i decided to remove the bootgrub2g file and again recreate the file, which had no luck for me. Centos 7 install with uefi boot and software raid1. May 30, 20 installing gentoo with grub2, gpt, luks and software raid mdraidmdadm so for various reasons i wanted to install gentoo utilizing full disk encryption with luks except for boot ofc, mdraid, gpt and grub2. Solved cant install grub2 on software raid found the problem. If you want to rerun the installer prompt, use dpkgreconfigure grubpc. This guide explains how to set up software raid1 on an already running lvm system debian squeeze. Number start sector end sector size code name 1 2048 1050623 512.

In trying to set this up, ive encountered several pitfalls and complexities. Gentoo forums view topic solved installing grub2 with. This page details the procedures for installing and reinstalling grub 2. I think that one thing that grub2install is complaining about is that it cant find bootgrub2. We are adding a second identical disk devsdb for raid 1 setup. Steps to configure software raid 1 mirroring in linux with and without spare disk with examples in rhel, centos and other linux distros using. This guide explains how to set up software raid1 on an already running lvm system ubuntu 19. Even if one of the disks in the raid array fails, the system can still boot. Solved cant install grub2 on software raid installation. If you have 2 x 500 gb hdd then total space become 1 tb. In uninstalled every program i installed since the first grub2 install, recompiled grub2 and all its dependencies, and now things seem a bit more the way they should be. In advanced storage the necessary steps are documented on how to install and use grub2 on more advanced storage situations, such as software raid, logical volumes or encrypted file systems. Once youre booting into your raid partitions, add the sda14 partitions to the appropriate raids, change the partition types on sda to 0xfd, and remember to clean up the legacy grub installation on sda with grub2install devsda. How to replace faulty disk in software raid using lvm.

I get through the initial setup of the, hostname, fully quilified domain name, root password, new userpassword setup, and i get to the partioning and software raid configuration. Now we have to set up the boot loader to boot to the raid drive. This guide explains how to set up software raid1 on an already running ubuntu 10. If you think so, you could put a link from the faqwikietc. Jul 11, 2010 installing grub2 on gnulinux software raid july 11, 2010 jad 1 comment linux i have been setting up a two machines with software raid to use as xen virtual environments. Briefly, a boot loader is the first software program that runs when a computer starts. The grub2 bootloader will be configured in such a way that. The grub2 bootloader will be configured in such a way that the. The example will be using raid 1 for everything except swap and temporary data. Ive heard rumors that grub2 is able to support boot on raid0, raid1 or raid5, metadata 0. The bootloader should be grub2 because the bios is. Grub2 install issue upon recovery of centos 7 system. Grub2 the grand unified bootloader version 2 is a replacement for the original grub legacy boot loader, which is now referred to as grub legacy. How to set up software raid 1 on a running system incl grub 2 configuration.

How to check grub2 is installed on both raid 1 hds. So attach the new disk in to the server mother board before proceeding with below steps. Ive had to manually install grub2 and its been a pretty painful procedure each time, so i would love to see if i can get this part. Ive run into grub2 installation problems multiple times now using completely different sets of machines. How to set up software raid1 on a running lvm system incl. The installation completed, and when the system rebooted, the os didnt come up.

Nov 17, 2012 grub uses physical and logical addresses to address the disk, it cant even read from new paritions whereas, grub2 uses uuid to identify a disk thus is more reliable. And my final step will be to write a small grub2raid howto nicely fited for grub2s wiki. The grub bootloader will be configured in such a way that the system will still be able to boot if one of the hard drives fails no matter which one. I want to use grub2 as boot loader, but i read that is needed to be created a bios boot partition.

Installing gentoo with grub2, gpt, luks and software raid mdraidmdadm so for various reasons i wanted to install gentoo utilizing full disk encryption with luks except for boot ofc, mdraid, gpt and grub2. Debian user forums view topic solved squeeze, grub2. Patch to support grub2 installation with software raid1 on linux on power ppc64ppc64le need to loop over multiple prep partition and install grub2 on it. Make sure that your grub configuration doesnt hardcode disks like hd0, but instead searches for the boot and root filesystems uuids. The grub2 bootloader will be configured in such a way that the system will still be able to boot if one of the hard drives fails no matter which one. Mar 06, 2015 this page details the procedures for installing and reinstalling grub 2. Installing grub2 on mdadm software raid in debian wheezy. When installing grub2 on my distrution gentoo it didnt work and gave some backtraces. Im trying now to install gentoo on a new machine using raid 1 boot and root in a single partition and raid 0 home. For software raid itself is was a legal but i admit strange configuration. First i tried making boot redundant by creating a second raid partition on the same drive, this still gave the same result. I hope to address those here and provide an endtoend guide for myself and others wishing to do similar activities.

Or do i have to partition the disks devsda1 100%, ditto devsdb1, then create the raid 1 with the partitions, and then grub2install. Xenserver 7 raid1 mdadm after install running system. I copied boot to tmp directory, destroyed devmd0 my boot with metadata 0. Installing grub2 with boot on software raid, continued. I do not issue any guarantee that this will work for you. I have recently added a drive to a system and have successfully raided raid1 the paritions, with the exception of the boot partition.

This article describes how to setup a linux system that can boot directly from a software raid1 device using grub. How to set up software raid1 on a running system incl. Does grub2 really support putting boot on a software raid5 partition. Create a disk at least 1 mb in size, type ef02 bios boot partition. Installing grub2 with boot on software raid, jordan uggla, 20701. I think i will attempt to add that to the grub2 wiki doc, i cant be the only one using raid and running into this issue on a new install. Please note that with a software implementation, the raid 1 level is the only option for the boot partition, because bootloaders reading the boot partition do not understand raid, but a raid 1 component partition can be read as a normal partition. Is there space for grub2 to install the bootloader under where the mdadm starts.

This guide explains how to set up software raid1 on an already running lvm system ubuntu 18. As far as i understand the guide gentoo linux x86 with software raid and lvm2 quick install guide does not use grub2 and i think i do not need lvm2. I just found that if you create such a setup with early squeeze versions of mdadm and grub2 you may run into an upgrade to wheezy. My question is will installer, grub2 and squeeze handle synchronization of. Grub2 has an entirely separate code base from grub legacy, and features a new shelllike syntax for advanced scripting capabilities. It is able to convert a single linux system disk in to a software raid 1, 4, 5, 6 or 10 system in a twopass simple command. In my setup, i have two disks that are each formatted in the following way. I made a raid 1 of two raw disks, devsda and devsdb, not devsdax devsdbx. Installing grub2 with boot on software raid, andrey borzenkov, 20701. Hi all, im a bit stuck on a new installation where i want to have 2 disks in software raid.

I am attempting to install debian using the software raid raid 1. For software raid 0, i would think that if the size of grub which is written normally in the mbr is not bigger than the raid 0 stripe size, then it should not be any problem and grub could be written on the first physical drive seen by bios. How to set up software raid 1 on a running system incl. Mirror your system drive using software raid fedora magazine. I booted the os and tried to install grub2 on the the first disk. Volgroup00, this is the volume group and md1 is the only pv in it. Verified that grub is there by trying to boot with sda not plugged in and going to the grub screen where you can choose oss and go to the grub command line. Installing grub2 with boot on software raid, wesley pa4wdh, 20703.

Installing to two devices in a raid 1 configuration seemed to work with no problems. I installed the grub2install and after reboot, i am at the same grub prompt where i was earlier. Hi all, it took me some time, but i got back to the point before the doublefree corruption. Installing to two devices in a raid1 configuration seemed to work with no problems. This guide explains how to set up software raid1 on an already running debian etch system. I hit the same problem and today i managed to fix it. May 1 grub software raid devices assemble after grub pr. Installing grub2 with boot on software raid, wesley pa4wdh, 20702. I decided to run gentoo as the dom0 os because there is lots of good documentation for it and it has always been my favorite gnu. Im trying to setup and install ubuntu on a raid 1 setup.

Linux software raid 1 is made with debian installer. This article describes how to setup a linux system that can boot directly from a software raid 1 device using grub. The uuid problem grub2 once had no longer appears to be an issue. Super grub2 disk helps you to boot into most any operating system os even if you cannot boot into it by normal means. Apr 19, 2018 i spent some time yesterday building out a uefi server that didnt have onboard hardware raid for its system drives. This should work with a simple software raid setup. That said, linux software raid is more robust and better supported and thus, recommended over fakeraid if you do not need to dual boot with windows. Jun 02, 2016 hi, have struggled with this for a day, too and found a soultion. Once youre booting into your raid partitions, add the sda 1 4 partitions to the appropriate raids, change the partition types on sda to 0xfd, and remember to clean up the legacy grub installation on sda with grub2 install devsda. Installing grub2 on gnulinux software raid sinodun. I like to setup grub2 on a gpt softare raid 3 tb hdd. Browse other questions tagged linux grub2 softwareraid xfs or ask your own question.

I had to partition the drives with parted first and make a partition for grub2 of 1 mb in size. It is responsible for loading and transferring control to an operating system kernel software such as linux or gnu mach. Need to use chroot with set a proper path in order for grub2install to call additional tool when boot is set on md devices. Setup grub2 on a gpt software raid 3 tb hdd server fault. Installing gentoo with grub2, gpt, luks and software raid. Installing grub2 on gnulinux software raid sinodun internet. Browse other questions tagged linux grub2 software raid xfs or ask your own question. I wanted to migrate this installation to a raid1 setup where there were two disks, four raid partitions md0, md1, md2, md3, in the same. Jul 05, 20 installing grub2 with boot on software raid, wesley pa4wdh, 20701. Linux gained inbuilt support for both the dmraid target and for grub2 support for booting from the array, and to this day there is great support for this chipset compared to other fakeraid. Jun 24, 2005 most users who are familiar with linux software raid are also familiar with raidtools.

I too run raid1 on all my debian systems so ill add comments from my experience. For a shotgun approach, see grub2 quick start if migrating from grub legacy to grub2, see grub2 migration. I have tested all tips, but still have same problem. The gentoo installation docs assume single disk and the grub2 install docs wiki didnt mention installing mdadm first. Im not aware of support in grub to declare two disks as being in a raid 1 array so that grub install would automatically write to both. Setting up raid on an existing debianubuntu installation. Solved installing grub2 with boot on software raid. How do i install grub on a raid system installation. My guess is that it all depends on the type of raid. The information applies to most versions of grub 2, but is specifically written for version 1.

To create a raid1 array on our already running system, we must prepare the devsdb hard. For more information on a variety of grub 2 topics, please visit the grub2 main page. Raider is a tool to automate linux software raid conversion. Ticky them both, then it will install grub to them.

My problem is that grub2install absolutely and resolutely refuses to install on devsda or devsdb. Ive been consistently using the same setup though with similar partitioning, software raid, and lvm. It can even deal with lvm where the entire raid array is a volume group and boot is in a logical volume on the raid array. How to set up software raid 1 on a running system incl grub.

Im having problems with soft raid and grub2 on debian 6. What im not sure of is if i need to go through and install the grub boot loader onto the rest of the hard drives, or if this configuration sans efi wont work. Hi, have struggled with this for a day, too and found a soultion. This guide explains how to set up software raid1 on an already running debian squeeze system. Grub2 has the ability to assemble raid arrays and read from them. Does grub2 really support putting boot on a software raid1 partition with 1. However, the mdadm tool is a single that is much more powerful. Basically, since xenserver 7 is based on centos 7, you should follow the centos 7 raid conversion guide. The most important tool for setting up raid is mdadm. In these situations, i always use linuxs md raid1 for the root filesystem andor boot. Then i installed centos 7 on the raid, with boot, and swap being partitions on the raid.