Now lets create our raid arrays devmd0, devmd1, and devmd2. Solved cant install grub2 on software raid my several installs of raid0 utilized grub 2 with no problems. I have been setting up a two machines with software raid to use as xen virtual environments. You may use mdadm for raid 56, which is supported by grub. Installing grub2 on gnulinux software raid sinodun. The easiest method i found was to use a usb drive to host the bootloader. R410 w software raid always boots to grub shell after. Neither grub nor lilo would install, so i carried on without a bootloader install. I cant help with installing grub now but what i did to get my raid running is i followed this instruction.
How to create a software raid 5 in linux mint ubuntu. Hi, all im very new to linux but have set myself some goals and am learning as i go. In the event of a failure you can boot fine off the second disk because it has an identical copy of the original boot partition. Solved how do i install grub on both mbrs of a two disk raid1. However i also have windows installed on a dynamic disk and everytime i boot into windows i first have to create the raid from scratch because somehow the mdadm superblock gets erased by windows any idea. In order to allow any of the two hard disks to boot using grub the following line must be disabled in the file etcdefaultgrub. Note that in my case, i have a lvm layer on my md raid. The red hat customer portal delivers the knowledge, expertise, and guidance available through your red hat subscription. Create a raid1 mirroring array and install ubuntu 18. This article describes how to setup a linux system that can boot directly from a software raid1 device using grub.
If the default hdd fails then raid will ask you to boot from a degraded disk. How to set up software raid1 on a running system incl. When installing packages, make sure that you install lvm2, mdadm not raidtools, and grub. 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. Software raid for root file system boot using grub 2. Install ubuntu on raid 0 and uefigpt system github. That adds a lot of overhead that slows down raid and you dont need the redundancy on swap. Afterwards we must install the grub bootloader on the second hard drive dev sdb. And then yes, you install grubs bootloader on all your drives so the server can boot from any of them. The operating system will continue to install on the raid you setup. Solved cant install grub2 on software raid arch linux. Instead of using the grub shell, i used grub install to install the boot loader on the hard drives. When the bootloaderstep is entered i selected grub2 each time i.
After adding a new disk to your raid chain its a good idea to make it bootable as well by installing grub on mbr. What i want to do now is install grub on the 2nd disk and make. The state of the active linux software raid devices can be viewed by running. If you have multiple kernel images installed on your system, you can choose which one to be executed. Install your linux of choice, without formating the boot. We can use it not only for software raid 5 but pretty much for any level of raid, simple or nested. The best way to use two or more disks for swap as in this situation is to set both partitions to the type swap then in etcfstab, set them with the same priority. When asked to install bootloader, install to first device. Software raid red hat enterprise linux 6 red hat customer portal. Following this, there are also no guides on installing the grub bootloader to both gpt partitioned devices afterwards.
This will be helpful when one hdd fails theres still a working grub. But when it gets to install the grub boot loader part i get the following. Installing grub onto drives that have boot raid partitions. Advantagesdisadvantages of installing grub on a software. Just to come to the grub loader and it coudlnt find any operating system. I have attempted to use ubuntus startup repair found on their forum however that was unsuccessful. Trying to install ubuntu server on a hardware raid 1 array instead of the native linux software raid. When the root file system is located on a software raid, an initramfs is necessary for automatic assembly. After some trynerr, i finally got to a way which works.
To install this on the second disk devhdc, we need to run grub. Changed system type of partition 1 to fd linux raid autodetect command m. When using grub with windows grub gets up to the second stage boot loader. Linux handles raid and syncs the two boot partitions. Grub shows a splash display screen, is waiting for a couple of seconds, unless you enter anything. I select manual set and create the paritions and software raid and assign ext 4 and swap. The reason for this post is i havent been able to find a guide for using mdadm in the ubuntu live server installer to create a raid1 partition. Ideally with raid 1, raid 5, etc once can easily do a hot hdd swap as they support mirroring at the hardware level but to do the same on a software raid 1 becomes tricky as ideally an os shutdown is needed to avoid any application impact during the hdd swap. The most important tool for setting up raid is mdadm.
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 gnulinux distribution. In this blog, we will check out how to install arch linux by setting software raid 1. R410 w software raid always boots to grub shell after linux install appreciate the reply, but i just bit the bullet and installed ubuntu on a flash drive and use fstab to mount partitions of the assembled raid on different parts of the filesystem. After the operating system installs, you will be prompted to install grub. Installing grub2 on mdadm software raid in debian wheezy. How do i setup grub correctly so that if one drive. My hardware raid controller is broken, so on the ubuntu partitioning manager i created a software raid0 array. At the end of the installation the installer asks to reboot. Software raid in linux is implemented by the multiple devices md driver.
How to perform disk replacement software raid 1 in linux. Thats the basics of multibooting of dual booting with linux and windows using grub. Overview of install grub grub stands for grand unified bootloader. Instead of using the grub shell, i used grubinstall to install the boot loader on the hard drives. Everything installs fine until i get to the boot loaders. Having seen our plain and simple install of ubuntu 12. In case your next hdd wont boot then simply install grub to another drive. I have tried to install the grub on the raid 0 disk, sda, sdb, and sdd my ssds and even my 1tb storage sdc and none were successful. How do i install grub on a raid system installation. Linux software raid howto with grub bootloader junjis. If your server is located in a remote area, the best practice may be to configure this to occur automatically. Gentoo linux x86 with software raid and lvm2 quick install guide.
Setting up raid on an existing debianubuntu installation. Replacing faulted drive on linux software raid mdtools, you already know how to swap a faulty drive with a new one, but what happens if you need to substitute primary disk where your computer makes boot. Choose yes to install it to the master boot record. This is a form of software raid using special drivers, and it is not. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with. I understand that formatting has to be done on the md devices and not on sd please tell me if this is wrong. Hello guy i need to install an ubuntu desktop with raid 1 software and i need to clarify points that i discovered were not so clair in my mind. On some systems its grub2install instead of grubinstall. Also make sure that you use rootdevmd2 in the linux line. Arch linux is a generalpurpose linux distribution for x8664 computers and is very popular among the intermediate and advanced linux users. Grub only has limited filesystem support built into itself.
Good question, but im pretty sure that it is softwarefakeraid raid from. Type grub from prompt and will put you in grubs shell. Setting up a bootable multidevice raid 1 using linux. I have been able to set up raid 0 in the bios across 3 separate ssds. Reads nf and then passes the button to the windows boot loader. Grub isnt actually using it as raid1 when booting i. After first boot, consider executing dpkgreconfigure grubpc or dpkgreconfigure grubefiamd64 on efi systems, and install to all devices. Linux software raid disc replacement procedure web and.
If it does not come with raid10 support then boot must be on its own regular partition that can be accessed without first assembling raid. Those few screenshots show how to install root on lvm on raid. So you need to make sure that the proper lvm tools package is installed. After having added both disks to the arrays, it was time to update the initrd again.