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. Solved cant install grub2 on software raid arch linux. Arch linux is a generalpurpose linux distribution for x8664 computers and is very popular among the intermediate and advanced linux users. Run blkid and fdisk to confirm the identification of the drive. 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. Proceed through the installer until you get to filesystem. The red hat customer portal delivers the knowledge, expertise, and guidance available through your red hat subscription. At the moment, im lost whether this is a problem with grub2, with lvm or with the raid setup.
Grub2 configuration debian squeeze this guide explains how to set up software raid1 on a. 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. Installing grub2 with boot on software raid, andrey borzenkov, 20701. 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. I have a brand new installation that im trying to install grub2 onto 6 disks, in a linux 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. My several installs of raid0 utilized grub 2 with no problems. 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. 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. This automatically called up grub2 via pacman and installed grub2. Lvm, mdadm, grub2 ask question asked 9 years, 1 month ago.
From what ive been reading, it looks like linux cant boot from a software raid 5 array. Grub2 configuration debian squeeze how to set up software raid1 on a running system incl. This guide explains how to set up software raid1 on an already running debian etch system. Neither grub nor lilo would install, so i carried on without a bootloader install. My question is will installer, grub2 and squeeze handle synchronization of. How do i install grub on a raid system installation. The bootloader should be grub2 because the bios is known to have issues with grub legacy. 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. Grub 2 now can recognize this potential problem and avoid it. Software raid red hat enterprise linux 6 red hat customer portal. Convert linux standard partitions to software raid lsa ts. Everything installs fine until i get to the boot loaders. The linux and initrd lines in bootgrubg should now load the linux. If one uses this new feature, then all data on the drive is mirrored at all times.
In this blog, we will check out how to install arch linux by setting software raid 1. Following this, there are also no guides on installing the grub bootloader to both gpt partitioned devices afterwards. 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. 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. This means youll need to run grub install again if you replace one disk. 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. Installing grub2 on gnulinux software raid sinodun internet. Grub configuration debian etch this guide explains how to set up software raid1 on an al. 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. Hi all, im a bit stuck on a new installation where i want to have 2 disks in software raid. After adding a new disk to your raid chain its a good idea to make it bootable as well by installing grub on mbr. Installing grub onto drives that have boot raid partitions. Grub dont support booting on a raid10 software raid. However, i havent seen this issue raised in any recent howtos just on old ones.
Install ubuntu with software raid mdadm for the installation, im using the live server installer for ubuntu server 18. Does grub2 really support putting boot on a software raid1 partition with 1. In my setup, i have two disks that are each formatted in the following way. 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. Hello all, i am trying to setup a raid 1 on my system that has 2 identical ide hard disks. I am attempting to install debian using the software raid raid 1. I used to install my servers with lvm over software raid1, and grub install on the mbr of both drives. Grub doesnt support lvm raid1 it supports only raid 456 type iirc. I want to use grub2 as boot loader, but i read that is needed to be created a bios boot partition. Even if one of the disks in the raid array fails, the system can still boot. 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. There is hardware raid, implemented by the controller on your motherboard or specific extension cards, and there is software raid, implemented by the kernel. You want to mirror your drive to create a raid 1 configuration, using linux software raid, without loss of data.
Installing grub2 with boot on software raid, wesley pa4wdh, 20703. When the bootloaderstep is entered i selected grub2 each time i loaded a new raid install. Installing grub2 with boot on software raid, wesley pa4wdh, 20706. Installing grub2 on gnulinux software raid sinodun. How to perform disk replacement software raid 1 in linux. Also make sure that you use rootdevmd2 in the linux line. 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. This article describes how to setup a linux system that can boot directly from a software raid 1 device using grub. Installing grub2 with boot on software raid, wesley pa4wdh, 20705. I spent some time yesterday building out a uefi server that didnt have onboard hardware raid for its system drives. 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. Installing grub2 with boot on software raid, continued. 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.
Linux software raid howto with grub bootloader junjis. Install debian 8 on a lvm volume with type raid1 grub2. Redundant array of inexpensive disks raid is a technology to combine multiple disks in order to improve their reliability andor performance. Also, you dont need to have a separate boot partition. Does grub2 really support putting boot on a software raid5 partition. It is used in modern gnu linux distributions in place of older software raid utilities such as raidtools2 or raidtools. Create raid arrays on each partition, with a missing disk, using the old superblock format. R410 w software raid always boots to grub shell after. 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. In these situations, i always use linux s md raid1 for the root filesystem andor boot.
Installing grub2 on mdadm software raid in debian wheezy. Linux software raid and grub recovering from a failure. Grub 2 normally writes its bootloader information to an area just beyond the master boot record and before the first partition. Type grub from prompt and will put you in grub s shell. This article will provide an example of how to install and configure arch linux with a software raid or logical volume manager lvm.
Now we need to register all the drives that constitute the software raid drives. 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. My hardware raid controller is broken, so on the ubuntu partitioning manager i created a software raid 0 array. Ive heard rumors that grub2 is able to support boot on raid 0, raid 1 or raid 5, metadata 0. I have been setting up a two machines with software raid to use as xen virtual environments. Software raid 1 setup on centos using grub boot loader.
777 899 98 312 424 1113 1252 924 1131 902 1290 453 764 635 1481 693 565 588 1055 1060 582 186 1584 1380 904 180 632 187 1027 712 801 339 189 478 947 1168 890 1397 260 106 1389 718 82