If you forgot this step, your second hard disk cant boot by itself. R410 w software raid always boots to grub shell after. Sep 12, 2015 hardware raid is generally faster, and does not place load on the cpu, and hardware raid can be used with any os. Can someone describe how i can restore the full machine backup to a new harddrive same size as the original. Software raid and lvm parabolawiki parabola gnulinuxlibre. Another person experienced it too on disks with legacy mbrmsdos partition scheme, so i do not think it is related to gpt. I tried to avoid installing the bootloader to every disk. Oct 26, 2017 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. Ubuntu server wont boot after clean install with software. Install debian etch on a software raid 1 with sata disks. How do i install grub on a raid system installation. Zero the superblock in case the new drive happened to be part of a linux software raid before. Debian software packages in buster, subsection debian.
Grub can boot from software raid1 if you ensure that its initial stage is properly installed on all the constituent drives it isnt actually aware it is booting of raid, but it works as each drive in the raid1 array has a full copy of everything as it it were a single drive. In this example, we use virtual machine qemu or kvm. Convert a single drive system to raid arch wiki arch linux. The procedure assumes that you have 2 indentical hard disks on your computer. Changed bug title to grub boot on large software raid systems may break due to bios limitations from grub2. I have installed debian stretch on my first system using uefi. First of all, boot the machine up and get access to the root partition.
Our team at linuxforce recently put together a debian server with lvm on a software raid5 volume. I have installed ubuntu, debian and centos dozens of times, and each time i get sent to a grub shell not rescue. New server, sata disks, the hardware raid controller is not really supported. Today i will share some thought on software raid under linux with you.
Installing grub2 with boot on software raid, wesley pa4wdh, 20705. This guide explains how to set up software raid1 on an already running debian etch system. This document was written based on a howto article for debian etch see references for original article. Even if one of the disks in the raid array fails, the system can still boot. Apr 28, 20 having the lvm in a different raid device is the most important part i guess. Software raid 5 in ubuntudebian with mdadm zack reed. Grub supports the default style of metadata currently created by mdadm i. Hello, after trying a couple of times to install debian on a raid 10 array mdadm i still failed to install the grub bootloader on the array. Falko timme last edited 11262007 this guide explains how to set up software raid1 on an already running debian etch system. Booting with software raid almost always requires a separate boot partition, especially with older versions of 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. But for software raid systems there is currently no support for putting the esp on two separate disks in raid. Software packages in stretch, subsection debianinstaller. Installing grub2 with boot on software raid, wesley pa4wdh, 20703.
Make sure that your grub configuration doesnt hardcode disks like hd0, but instead searches for the boot and root filesystems uuids. Grub2 supports the default style of metadata currently created by mdadm i. We will learn how to configure software raid, how to examine raid devices, how to see the detail information about raid devices along with active components. Raid arrays offer some compelling redundancy and performance enhancements over using multiple disks individually.
Disk partitions devhda1 and devhdc1 will be used as the members of the raid array md0, which will be mounted on the home partition. It provides the ability for one drive to fail without any data loss. When typical stuff like grub install from a rescue console doesnt work. Put simply, its that the uefi grub2 requires you to put g in the efi system. From what i have read the uefi partition and the boot partition must be on a raid 1 partition. Sometimes you need to store data relative save and high available. 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.
You could use software raid, lvm, and any filesystem normally. Newt frontend for debian configuration management system cdebconfpriority 0. Debian server does not get to grub on boot possible raid. Im working at a small business that runs their own webmailfile server. Solved debian software raid 1 and grub issue page 2. 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. The software raid in linux is well tested, but even with well tested software, raid can fail. Installing grub2 on mdadm software raid in debian wheezyjessie principle. 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.
This guide explains how to set up software raid1 on an already running debian squeeze system. Using configure software raid im creating raid 1 devices on pairs of partitions earlier marked as. In our earlier articles, weve seen how to setup a raid 0 and raid 1 with minimum 2 number of disks. Warning this type of automated partitioning is easy to get wrong. Note that if youve converted an mbr disk to gpt format, booting will fail even if you were previously using a gptaware version of grub. Heres a quick way to calculate how much space youll have when youre complete. I am attempting to install debian using the software raid raid 1. Jun, 2017 follow the below steps to configure raid 5 software raid in linux using mdadm as we discussed earlier to configure raid 5 we need altleast three harddisks of same size here i have three harddisks of same size i. Restoring a volume to softwareraid1 veeam community forums.
Instead, you should make a small 1mb partition on each disk and raid them together and set it as a grub boot partition im not sure of the actual name. This article describes how to setup a linux system that can boot directly from a software raid 1 device using grub. Menu software raid on debian linux 14 january 2010 on hardware, filesystem, mdadm, monitoring, raid, linux. I can reproduce the problem, which did not happen with wheezy. If the installation comes to partition method, use manual.
Since raid hardware is very expensive, many motherboard manufacturers use multichannel controllers with special bios features to perform raid. Installing grub2 with boot on software raid, andrey borzenkov, 20701. So we decided to use a software raid 1 for the two disks. The debian installer does not seem to recognize that grub should be installed on each disk participating to the raid1 array, and it just installs to the first disk devsda. Setting up a bootable multidevice raid 1 using linux software. This is a known limitation, and there isnt any way to fix this at the moment.
Debian user forums view topic grub boot loader on debian 9. Debian software packages in bullseye, subsection admin. Grub2 configuration debian squeeze how to set up software raid1 on a running system incl. But now i need to figure out how to add redundancy to the software raid 1 since i believe boot entries are only added to one disk during installation time. Nov 07, 2014 raid mdadm software raid issues with grub playing around on my labrat i realized that sometimes elcentos 6. This is a form of software raid using special drivers, and it is not. How to configure software raid1 during installation process. In this guide, we demonstrated how to create various types of arrays using linuxs mdadm software raid utility. Raid 5 requires a minimum of 3 drives, and all should be the same size. You likely need to setup grub on both disks since youre in raid1.
Debian server does not get to grub on boot possible raid issue ask question asked 5 years, 11 months ago. Lvm single drive to lvm raid 1 mirror migration debian. I tried to setup the efi system partition at install time with software raid1 array. Your firmware does not understand how to interpret linux software raid, so you cannot use a software raid setup for the efi system partition esp. 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. To setup raid 10, we need at least 4 number of disks. 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. Sep 26, 2017 how to install and configure debian 9. Installing grub2 with boot on software raid, wesley pa4wdh, 20706. The most important tool for setting up raid is mdadm.
Jun 24, 2005 at this point the raid module built into the kernel will try to assemble your raid 1 array using a nonexistant drive and your secondary, or mirror, drive. Debian user forums view topic grub rescue, will not. Debian includes edk2based vm firmware for arm64 in the qemuefi package. Software raid 5 in ubuntu debian with mdadm 9 min read.
At this point the raid module built into the kernel will try to assemble your raid 1 array using a nonexistant drive and your secondary, or mirror, drive. This is because the mbr and gpt boottime code for grub is different. The example below shows how to create a software raid1 array on debian systems. If you are using raid 1, you can preseed grub to install to all devices used in the array. My guess is that it all depends on the type of raid. This document explains how to set up debian gnulinux on a computer with your root partition on a raid volume managed with lvm. How to set up software raid1 on a running system incl.
This time we are going to explain you here about the concept and configuration of software raid10 step wise in detail. Nov 19, 2010 how to setup software raid in debian ubuntu november 19, 2010 awang apandy 2 comments this time around, i will show you how to configure the software raid using debian. Debian software raid1 without recompiling mini howto. Uefi should be able to boot whatever disk hasnt failed, and grub install will write to the raid mounted at bootefi. In the following it is assumed that you have a software raid where a disk more than the redundancy has failed. This site is the linux raid kernel list communitymanaged reference for linux software raid as implemented in recent version 4 kernels and earlier. It should replace many of the unmaintained and outofdate documents out there such as the software raid howto and the linux raid faq. Installing grub2 on mdadm software raid in debian wheezy. Then we tell grub to assume the new second drive is hd0, i. I too run raid1 on all my debian systems so ill add comments from my experience. Jan 14, 2010 software raid on debian linux 14 january 2010 on hardware, filesystem, mdadm, monitoring, raid, linux. Its possible to install manually on the other disks with the grubinstall command see further on.
This document gives an example on how to setup a clean linux system which can boot directly from a software raid device. This page contains some screenshots to demonstrate it, and applies to debian 5. Previous post how to setup software raid for centos next post how to setup sofware raid in freebsd. During the install, make sure grub is installed to the mbrgpt of the primary disk. If none of the more specific forums is the right place to ask. For some reason this is often described as aavmf to distinguish it from ovmf for x86. 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.
The goal is to setup a raid 1 device to mount as and to boot from. Is it possible and wise to put the grub bios partition on a software raid. Well, i believe ive now got raid installed, but i still cant boot. On debian this is called a reserved bios boot area. Grand unified bootloader legacy version grub is a gpled bootloader intended to unify bootloading across x86 operating systems. I disabled uefi mode and also the smart array, so i used the legacy boos mode. I just have to investigate how to add the boot option grub to the other disks, because now i just have one bootable disk and if this disk fails the raid 6 wont help me. Aug 16, 2016 your raid 10 array should now automatically be assembled and mounted each boot. Fixing an unbootable computer after a failed grub installation can be a bit tricky. Install grub on both physical drives mbr and edit etc. Grub configuration debian etch how to set up software raid1 on a running system incl. Uefi boot, fresh debian 8 amd64, raid 1 on two gpt disks.
Here we will use both raid 0 and raid 1 to perform a raid 10 setup with minimum of 4 drives. Setting up raid on an existing debianubuntu installation. 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. This has been possible through complex installation procedures in the past, but today the debian etch installer is capable of handling such an installation if you follow the proper steps, which i outline in this article. Mar 22, 2007 our team at linuxforce recently put together a debian server with lvm on a software raid5 volume. Grub2 configuration debian squeeze 1 preliminary note.
Raid 10 is a combine of raid 0 and raid 1 to form a raid 10. By default, the grub boot loader only were installed in one of the hard disk only. 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. I have an r410 with a sas6ir no dedicated raid card, 4x3tb drives, and it came preinstalled with windows. Nov 15, 2011 software raid 5 in ubuntu debian with mdadm 9 min read. How to manage software raid s in linux with mdadm tool part 9. I have a mdadm raid on my machine and i will find out, how i can do a downgraderemove the mdadm for easier backup with veeam. If the kernel panics because it can not mount the root drive, then the cause is almost certainly that your kernel is missing the mddegradedboot patch see section 4. Get a debian installation cd for the same architecture i. I had an raid1 with spare the ubuntu installer allows to set as partition type efi system on the software raid array. Debian server not booting after software raid 1 array degraded. In addition to loading the linux kernel, it implements the multiboot standard, which allows for flexible loading of multiple boot images needed for.
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