Mar 06, 2015 if the system partitions are on a software raid install grub 2 on all disks in the raid. Nov 28, 2019 i however do not see this problem when attempting to install on 1. Installation of grub2 software as the boot loader of the system. The gentoo installation docs assume single disk and the grub2 install docs wiki didnt mention installing mdadm first. Home how to set up software raid1 on a running system incl. Mirror your system drive using software raid fedora magazine. Installing gentoo with grub2, gpt, luks and software raid. Grub2installing community help wiki ubuntu documentation. Filesystem size used avail use% mounted on devmd2 1.
I am attempting to install debian using the software raid raid 1. On some systems its grub2install instead of grubinstall. 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. 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. Ticky them both, then it will install grub to them. 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. After first boot, consider executing dpkgreconfigure grubpc or dpkgreconfigure grubefiamd64 on efi systems, and install to all devices. 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.
Sep 11, 2019 super grub2 disk helps you to boot into most any operating system os even if you cannot boot into it by normal means. Does grub2 really support putting boot on a software raid5 partition. This guide will convert your system to raid1 just fine, but if you attempt to change your kernel options in etcdefaultgrub, the changes. Once youre running on the degraded raid you resync the raid to the original disk. View topic solved installing grub2 with boot on software raid. 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. 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. 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. I have it ready and mirrored, but cant get grub2 updategrub to find it. I cant help with installing grub now but what i did to get my raid running is i followed this instruction. By default it tries my first disk, which gives a fatal error. There are two important aspects to the configuration of grub2. First we cover the configuration of the boot loader itself.
I have been setting up a two machines with software raid to use as xen virtual environments. This will be helpful when one hdd fails theres still a working grub. I have recently added a drive to a system and have successfully raid ed raid 1 the paritions, with the exception of the boot partition. At this point the raid module built into the kernel will try to assemble your raid1 array using a nonexistant drive and your secondary, or mirror, drive. I have 2 disk western digital wd2002faex 2tb and i want to install squeeze with software raid 1 and gpt instead of old msdos partition map. Ive run into grub2 installation problems multiple times now using completely different sets of machines. May 03, 2019 if you do a fresh install of fedora, then then the options are stored in boot grub2 grubenv instead of bootefifedorag. If i configure the partitions as ext3 i can set the bootable flag to on. Super grub2 disk helps you to boot into most any operating system os even if you cannot boot into it by normal means. How to set up software raid1 on a running lvm system incl. Xenserver 7 raid1 mdadm after install running system.
The settings will be saved, so the grub install can be refreshed automatically on package updates i guess its arguable whether thats a great idea, but it would make your system consistent with a nonbotched install. My understanding is that grub1 doesnt know anything about raid and so cant boot off any kind of raid array. The bootloader should be grub2 because the bios is known to. In this tutorial, youll learn how to install ubuntu server 16. This guide explains how to set up software raid1 on an already running lvm system ubuntu 10. Recently one of the drives in my raid 1 array failed, i removed the disk from the array and after it was installed, added it. While installing a grub we should not install on a partition, instead install the grub on the whole disk. Im a bit stuck on a new installation where i want to have 2 disks in software raid.
Super grub2 disk supports booting osx, loop booting from iso files, and booting an os from a usb without usb support in the bios. The installation completed, and when the system rebooted, the os didnt come up. Centos 6 wont bootload grub on software raid devmd0. Wipe the original drive by adding it to the raid array.
Super grub2 disk is intended only for providing the ability to boot to a damaged os, it does not write to the disk or rewrite the mbr master boot record, and does not include any repair remedies. The cd should be 64bit not 32bit if the system to fix is 64 bit. I made a raid 1 of two raw disks, devsda and devsdb, not devsdax devsdbx. Installing grub2 on ubuntu with software raid mirroring. If the system partitions are on a software raid install grub 2 on all disks in the raid. How to set up software raid1 on a running system incl. Feb 27, 2020 i have created a raid 1 for the swap partitions, and raid 10 for.
At first i thought this was a problem with my disk capacity, but here is one youtube video where the uploader had no issues setting up the os in a raid 1 setup with 20gb drives. I have created a raid 1 for the swap partitions, and raid 10 for. 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. I do not issue any guarantee that this continue reading how to set up software raid1 on a running. An ideal answer would link to a tutorial that explains how to move a boot partition on a non raid partition to a raid5 partition. Physical raid or software raid redundant array of independent disks are used for reliability, resilience and performance. Ive been consistently using the same setup though with similar partitioning, software raid, and lvm. Uefi should be able to boot whatever disk hasnt failed, and grubinstall will write to the raid mounted at bootefi. Jul 11, 2010 i have been setting up a two machines with software raid to use as xen virtual environments.
Apr 19, 2018 uefi should be able to boot whatever disk hasnt failed, and grubinstall will write to the raid mounted at bootefi. My problem is that grub2install absolutely and resolutely refuses to install on devsda or devsdb. Now we need to make a note of the raid array device on which your linux partition exists it will be listed as a hard disk which is the total size of your array, and is usually the same as your. Grub2 install issue upon recovery of centos 7 system. According to the official notes, you need to install nonraid to one disk, create degraded raid1 on the other disk, then manually copy everything over. Re install grub devmd0 may be different for you depending on how you configured your software raid grub install devmd0. The above commands helped me fix this issue on centos 6. If the two disks are devsda and devsdb, run both grubinstall devsda and grubinstall devsdb. In my case devsda1 is the partition used for boot so i need to install the grub on devsda. Gentoo forums view topic solved installing grub2 with. 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. This should work with a simple software raid setup. 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. Check the number of hard disk you will install, be it usb or hdd.
Assuming the normal system partition s are on a software raid otherwise skip this step. Either grubinstall md0 if you want to have grub2 in all mbrs of devmd0 or just the old way like grubinstall devsda for every disk. When the bootloaderstep is entered i selected grub2 each time i. 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. In configuration variables an exhaustive list of grub2 configuration variables, as used by etcdefaultgrub, is documented. In disk management is disk 2, we will remember number 2 here. This guide explains how to set up software raid1 on an already running ubuntu 10. 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.
If the system partitions are on a software raid install grub 2 on all disks. Install grub2 on usb and hdd from windows aio boot. Solved cant install grub2 on software raid my several installs of raid0 utilized grub 2 with no problems. Jan 25, 2017 my problem is that grub2install absolutely and resolutely refuses to install on devsda or devsdb. Whilst the new code handling the raid io still runs in the kernel, devicemapper is generally. Enable grub2s pata support to work around bios bugslimitation solarwinds mail assure helps your customers stay in control and protect their inbound and outbound email using collective threat intelligence. If you look at the result of the command df h and you are using the mdmadm software raid 1 then you can only see the devmdx partitions. Grub2 install issue upon recovery of centos 7 system issue. Install the grub under devsda by running below command. When the bootloaderstep is entered i selected grub2 each time i loaded a new raid install.
Installing grub2 with boot on software raid gnu mailing lists. The problem is at the end of the installation, it tries to install grub. The most important part is to save our precious data without losing it in a production platform. Setting up raid on an existing debianubuntu installation. Raid 6 also uses striping, like raid 5, but stores two distinct parity blocks distributed across each member disk. It looks like currently most os installers insist on putting boot on a non raid partition or the kind of raid1 partition that looks like a non raid partition, even the installers that support raid5 and grub2 im guessing this limitation is a historical relic leftover from grub1.
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 grub2 install devsda. I want to use grub2 as boot loader, but i read that is needed to be created a bios boot partition. 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. Ive currently got it up in a halfassed rescue mode, and have mount o bind dev, proc and sys under mntsysimage, and chrooted there. Grub vs grub2 bootloader learn the main difference. Installing grub2 on mdadm software raid in debian wheezy. Then i installed centos 7 on the raid, with boot, and swap being partitions on the raid.
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. 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. 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. How to check grub2 is installed on both raid 1 hds. Install grub 2 on a fake raid system techspot forums. 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. When asked to install bootloader, install to first device. Despite the terminology, fake raid via dmraid is a robust software raid implementation that offers a solid system to mirror or stripe data across multiple disks with negligible overhead for any modern system.
It looks like currently most os installers insist on putting boot on a nonraid partition or the kind of raid1 partition that looks like a nonraid partition, even the installers that support raid5 and grub2 im guessing this limitation is a historical relic leftover from grub1. According to the official notes, you need to install non raid to one disk, create degraded raid 1 on the other disk, then manually copy everything over. Im battling with the same issue for a different linux os. However, when i get the raid complete, and continue the install, it fails to load grub2, because it is. Does grub2 really support putting boot on a software raid1 partition with 1. Raid 6 requires 4 or more physical drives, and provides the benefits of raid 5 but with security against two drive failures. If you do a fresh install of fedora, then then the options are stored in bootgrub2grubenv instead of bootefifedorag. Jun 26, 2017 check the number of hard disk you will install, be it usb or hdd.
So, i thought to assemble the raid volumes, mount the root volumes and fix the grub devices to match what mdadm detail says i had booted into centos server installs dvd rescue system, chose to execute a shell from the installer environment and not to use a root file system. How do i install grub on a raid system installation. Im trying to setup and install ubuntu on a raid 1 setup. Sep 14, 2010 now we need to make a note of the raid array device on which your linux partition exists it will be listed as a hard disk which is the total size of your array, and is usually the same as your. The most important tool for setting up raid is mdadm. The installation of grub2 software is specific to the type of system, and is covered in installing the boot loader. Installing with limited sectors will cripple grub2s operation making it incapable of. May 25, 2015 so, i thought to assemble the raid volumes, mount the root volumes and fix the grub devices to match what mdadm detail says i had booted into centos server install s dvd rescue system, chose to execute a shell from the installer environment and not to use a root file system. 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. 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.
Installing grub2 on gnulinux software raid sinodun. Grub2 configuration debian squeeze scan your webserver for malware with ispprotect now. This guide will convert your system to raid1 just fine, but if you attempt to change your kernel options in etcdefaultgrub, the changes will not get written to the right place. I have recently added a drive to a system and have successfully raided raid1 the paritions, with the exception of the boot partition. That makes sense, but my install will not allow me to set it to on for physical volume for raid. Grub2 for windows supports installation and boot on three platforms. 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. Starting the installation begin the installation by booting up the ubuntu server dvd or usb and then following the wizard through to the partition disks screen.