I want to use grub2 as boot loader, but i read that is needed to be created a bios boot partition. Ive heard rumors that grub2 is able to support boot on raid 0, raid 1 or raid 5, metadata 0. Type grub from prompt and will put you in grub s shell. From what ive been reading, it looks like linux cant boot from a software raid 5 array. If you search for software raid grub youll find a number of web pages that more or less get you there with what you need to know. Convert linux standard partitions to software raid lsa ts. How to set up software raid1 on a running system incl. This will be helpful when one hdd fails theres still a working grub. This doesnt sound like a highend or traffic server to me, so the performance penalty probably wont be that hard. After adding a new disk to your raid chain its a good idea to make it bootable as well by installing grub on mbr. Even if one of the disks in the raid array fails, the system can still boot. In this blog, we will check out how to install arch linux by setting software raid 1. I have a brand new installation that im trying to install grub2 onto 6 disks, in a linux software raid 5 array. Now i have an uefi server, and the compatibility bios mode does not seem to work.
Install debian 8 on a lvm volume with type raid1 grub2. This article will provide an example of how to install and configure arch linux with a software raid or logical volume manager lvm. Installing grub2 on gnulinux software raid sinodun. Redundant array of inexpensive disks raid is a technology to combine multiple disks in order to improve their reliability andor performance. Lvm, mdadm, grub2 ask question asked 9 years, 1 month ago. 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. Grub 2 normally writes its bootloader information to an area just beyond the master boot record and before the first partition. Grub2 configuration debian squeeze how to set up software raid1 on a running system incl. Installing grub2 with boot on software raid, andrey borzenkov, 20701. Then run updategrub, and it will see that you are currently booting from the raid array and configure itself to do so in the future.
Installing grub2 with boot on software raid, wesley pa4wdh, 20705. My question is will installer, grub2 and squeeze handle synchronization of. In these situations, i always use linux s md raid1 for the root filesystem andor boot. Grub2 configuration debian squeeze this guide explains how to set up software raid1 on a. Proceed through the installer until you get to filesystem. I am attempting to install debian using the software raid raid 1. Install ubuntu with software raid mdadm for the installation, im using the live server installer for ubuntu server 18. Grub doesnt support lvm raid1 it supports only raid 456 type iirc. This guide explains how to set up software raid1 on an already running debian etch system. Everything installs fine until i get to the boot loaders. I have been setting up a two machines with software raid to use as xen virtual environments. Installing grub2 on mdadm software raid in debian wheezy. At the moment, im lost whether this is a problem with grub2, with lvm or with the raid setup. Installing grub2 with boot on software raid, continued.
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. Arch linux is a generalpurpose linux distribution for x8664 computers and is very popular among the intermediate and advanced linux users. Also, you dont need to have a separate boot partition. Installing grub2 with boot on software raid, wesley pa4wdh, 20703. Grub configuration debian etch this guide explains how to set up software raid1 on an al. Following this, there are also no guides on installing the grub bootloader to both gpt partitioned devices afterwards. Linux software raid howto with grub bootloader junjis. Does grub2 really support putting boot on a software raid1 partition with 1.
I just wanted to point out that ive seen weird lvm raid grub issues before, and solved it via a third drive via beating my head against. Software raid red hat enterprise linux 6 red hat customer portal. This means youll need to run grub install again if you replace one disk. 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 linux. At the grub menu, press e to edit the menu entry and manually change the root kernel argument to point to the raid array and boot from it manually.
Neither grub nor lilo would install, so i carried on without a bootloader install. This automatically called up grub2 via pacman and installed grub2. How to perform disk replacement software raid 1 in linux. There is hardware raid, implemented by the controller on your motherboard or specific extension cards, and there is software raid, implemented by the kernel. Also make sure that you use rootdevmd2 in the linux line. Installing grub onto drives that have boot raid partitions. My hardware raid controller is broken, so on the ubuntu partitioning manager i created a software raid 0 array. 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. Some software on non linux operating systems also used this embedded area and broke the system by overwriting the grub 2 information on dualboot systems. When the bootloaderstep is entered i selected grub2 each time i loaded a new raid install. 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. This worked well for bios booting since bios just transfers control blindly to the mbr of whatever disk it sees modulo finding a bootable partition flag, etc, etc.
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. Hi all, im a bit stuck on a new installation where i want to have 2 disks in software raid. Hello all, i am trying to setup a raid 1 on my system that has 2 identical ide hard disks. Now we need to register all the drives that constitute the software raid drives. This article describes how to setup a linux system that can boot directly from a software raid 1 device using grub. Grub 2 now can recognize this potential problem and avoid it. Installing grub2 with boot on software raid, wesley pa4wdh, 20706. Id previously set up raid 1 on systems and there was no real issue about boot it could be read on one drive or the other.
Software raid 1 setup on centos using grub boot loader. Does grub2 really support putting boot on a software raid5 partition. I spent some time yesterday building out a uefi server that didnt have onboard hardware raid for its system drives. I cant help with installing grub now but what i did to get my raid running is i followed this instruction. Mac os x, linux, windows and other it tips and tricks. If one uses this new feature, then all data on the drive is mirrored at all times. Grub dont support booting on a raid10 software raid. It is used in modern gnu linux distributions in place of older software raid utilities such as raidtools2 or raidtools. The linux and initrd lines in bootgrubg should now load the linux. R410 w software raid always boots to grub shell after. I used to install my servers with lvm over software raid1, and grub install on the mbr of both drives. How do i install grub on a raid system installation.
This wiki describes how to get linux to see the raid as one disk and boot from it in the same way that windows will install on this type of device. Installing grub2 on gnulinux software raid sinodun internet. Create raid arrays on each partition, with a missing disk, using the old superblock format. Getting grub installed on the hard drives was, in the end, easier than i thought but was rocky due to the complexity of the issues involved and me not understanding them fully. However, i havent seen this issue raised in any recent howtos just on old ones. You want to mirror your drive to create a raid 1 configuration, using linux software raid, without loss of data. Run blkid and fdisk to confirm the identification of the drive. Solved cant install grub2 on software raid arch linux. In my setup, i have two disks that are each formatted in the following way. 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. 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. The red hat customer portal delivers the knowledge, expertise, and guidance available through your red hat subscription.
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