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. 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. So, assuming your root partition is located on devsda3 and you have a separate boot on devsda1 you would do the following. 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. View topic solved installing grub2 with boot on software raid. Adding or improving documentation on the gentoo wiki. However, be careful for example the gentoo page for grub2raid has currently been cobbled together and needs revising by someone who knows the difference between raid and lvm. This is not a replacement for the official gentoo handbook. Also, it only discusses how to setup a raid array for arbitrary storage. Gentoo raid installation and other sundry ways to wack your box by g. Installing grub2 on gnulinux software raid sinodun.
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. Number start end size file system name flags 1 1049kb 106mb 105mb fat32 efi system partition boot 2 106mb 240mb 4mb microsoft reserved partition msftres 3 240mb 456gb 456gb ntfs basic data. Installation of grub2 software as the boot loader of the system. Changing root hard disk on gentoo with lvm and grub2. Jul 11, 2010 i have been setting up a two machines with software raid to use as xen virtual environments. Installing gentoo with grub2, gpt, luks and software raid. Jun 24, 2005 raid devices should be assembled by the kernel before any. Solved cant install grub2 on software raid installation. 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.
For a shotgun approach, see grub2 quick start if migrating from grub legacy to grub2, see grub2 migration. For illustrative purposes we will also create other partitions using lvm2 on the raid1 array, providing a fully mirrored system. 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. Raid 1 issues grub2 hello, ive been trying to get a software raid setup on 2 1tb drives with xmbcbuntu for about a week. Booting from a raid array is very similar to booting from a lvm logical volume aside from raid specific terminology and syntax of raid partitioned volume. While browsing some linux sites, i found that using grub2, we can have boot on lvm raid. Way back in 2005, the reorganization of gentoo led to the formation of the gentoo council, a steering body elected annually by the gentoo developers. Check the number of hard disk you will install, be it usb or hdd. Run kali linux, backbox and gentoo distrubutions directly. Grub vs grub2 bootloader learn the main difference.
How to install windows 7 onto a software raid array. This howto is a mix between the gentoo handbook, sasaki handbook and many tips found on the web. Grub 1 doesnt know anything about raid, but can fake reading from a raid1 device by reading one of the disks this requires a 0. Jun 06, 2014 this tutorial will concentrate on presenting a way you can run some linux iso distributions directly from your hard disk by editing ubuntu 14. How do i install grub on a raid system installation. The gentoo wiki has information that discusses both grub 1 and grub 2. 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 recently added a drive to a system and have successfully raided raid1 the paritions, with the exception of the boot partition. Raider is a tool to automate linux software raid conversion. Number start end size file system name flags 1 1049kb 500mb 499mb esi boot 2 500mb 35. Note that the situation is completely different in grub 1 and grub 2.
Changing root hard disk on gentoo with lvm and grub2 blog. Disclaimer wol wrote most of the raid stuff and someone else has merged it with the lvm stuff. Even if one of the disks in the raid array fails, the system can still boot. Minimal installation cd 20200223 348 mib hybrid iso livedvd 20160704 2 gib. 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 configuration. The website of gentoo, a flexible linux distribution. This guide explains how to set up software raid1 on an already running debian squeeze system. I think in most instances, my problem seems to be grub. Raid devices should be assembled by the kernel before any. In bios mbr disks, leave a space at the start of the disk for grub2 to be installed.
I wanted to migrate this installation to a raid 1 setup where there were two disks, four raid partitions md0, md1, md2, md3, in the same configuration. This should work with a simple software raid setup. Grub 1 doesnt know anything about raid, but can fake reading from a raid 1 device by reading one of the disks this requires a 0. The first important part is to understand which drive is bootable. Dualboot gentoo and windows 7 with biospowered software raid. For those who followed the gentoo handbook it should be devsda. If you pointed grub2 install at the right place the second command line at 1, i believe you should have grubx64. The grub2 install devsda and grub2 install devsdb should work as expected on a raid 1 array comprised of devsda2 and devsdb2 for boot. 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. I have it ready and mirrored, but cant get grub2 updategrub to find it.
Warning the grubmkconfig utility does not work properly when using software raid. In disk management is disk 2, we will remember number 2 here. These instructions only discuss the last form of raid. Software raid has to be managed by the operating system that is currently running, so to use linux on software raid, linux has to be actively running. Jun 26, 2017 check the number of hard disk you will install, be it usb or hdd. Gentoo provides two ways of building and installing linux kernel. If you pointed grub2install at the right place the second command line at 1, i believe you should have grubx64. Grub2 has an entirely separate code base from grub legacy, and features a new shelllike syntax for advanced scripting capabilities. 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. As outlined in the gentoo grub2 wiki page recovery section you can simply reinstall grub2 to the mbr master boot record, linking to your original boot location. Introduction this is a guide to help with the initial setup and install of gentoo on a fairly recent pc with uefi. In configuration variables an exhaustive list of grub2 configuration variables, as used by etcdefaultgrub, is documented.
Gentoo forums view topic solved installing grub2 with. So i followed the gentoo x86 with software raid and lvm2 quickinstall. As far as i know and i just finished installing 2 such systems grub2 just works. Gentoo installation with raid, lvm, luks and systemd. When the bootloaderstep is entered i selected grub2 each time i loaded a new raid install. Boot from the ubuntu live usbcd and select the option try ubuntu without installing check if efi is enabled in. Hi, i just migrated to grub2 which works fine thanks to the good gentoo docs. Grub2 the grand unified bootloader version 2 is a replacement for the original grub legacy boot loader, which is now referred to as grub legacy. As outlined in the gentoo grub2 wiki page recovery section you can simply reinstall grub2 to the mbr master boot record, linking to your original boot location so, assuming your root partition is located on devsda3 and you have a separate boot on devsda1 you would do the following.
Solved cant install grub2 on software raid my several installs of raid0 utilized grub 2 with no problems. This article describes how to setup a linux system that can boot directly from a software raid1 device using grub. You cant have two different operating systems managing the same raid array because he way they create, use, and manage raid is. By default it tries my first disk, which gives a fatal error. If you want to play with getting it working with the uefi stub in the kernel the way its booting now, you will need to add in the kernel command line options you need to boot into the kernel itself, which you. Mar 06, 2015 if the system partitions are on a software raid install grub 2 on all disks in the raid. To use windows and software raid, windows has to be actively running. Grub2 for windows supports installation and boot on three platforms. Gentoo linux installation guide with screenshots part 2. Live environments and stage archives can be downloaded using the links below. You might need to add the initrd in you grub configuration after the kernel line.
How to set up software raid1 on a running system incl. You can boot up to grub and boot anything from the command line, for. 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. After all, it was a grub2 bugissue with a degraded software raid array grub2 1. Grub2 is better than grub original in the features it provides, other than that, grub legacy trumples grub2 in all aspects. If the system partitions are on a software raid install grub 2 on all disks in the raid. However, while both versions of grub can be installed simultaneously, only one version of grub may be active as the systems bootloader at a time.
You know what gentoo is and what you are getting yourself into, you. I am not the best typist this side of stone mountain. When the root file system is located on a software raid, an initramfs is necessary for automatic assembly. Install grub2 on usb and hdd from windows aio boot. However, be careful for example the gentoo page for grub2 raid has currently been cobbled together and needs revising by someone who knows the difference between raid and lvm. The gentoo installation docs assume single disk and the grub2 install docs wiki didnt mention installing mdadm first. Forward 15 years, and today we had our 200th meeting. Tired of go on a lot of link each time, i decided of all regroup in a massive tutorial. I cannot update by grub too through any third party rpm repositories since i do not have an internet connection. Im trying to setup and install ubuntu on a raid 1 setup. Reviving an old tradition, the next gentoo bugday will take place on saturday 20200606.
Raid 6 requires 4 or more physical drives, and provides the benefits of raid 5 but with security against two drive failures. This documentation is free for all to read and use. Software raid for root file system boot using grub 2. The article confuses the md raid uuid with the filesystem uuid. I started from a complete, working gentoo installation on one hard drive comprised of the recommended 4 partitions call it hard drive sda. We will be using gentoo installation as an example. Raid 6 also uses striping, like raid 5, but stores two distinct parity blocks distributed across each member disk. If somethings wrong please feel free to correct it.
Booting in rescue mode onto the system and letting the raid recover itself has fixed the issue for the original setup in question. I have been setting up a two machines with software raid to use as xen virtual environments. The problem is at the end of the installation, it tries to install grub. This tutorial will concentrate on presenting a way you can run some linux iso distributions directly from your hard disk by editing ubuntu 14. The sysboot grub package is slotted which means both grub 0. It is able to convert a single linux system disk in to a software raid 1, 4, 5, 6 or 10 system in a twopass simple command.
In this tutorial i will show you how to reinstall grub2 bootloader on a ubuntu system with efi partition. Unlike grub2, in grub legacy partition numbering also starts at 0. Details contents, hashes, and signatures minimal installation cd, hybrid iso, stage 3. While browsing some linux sites, i found that using grub2, we can have boot on lvmraid. At any point, if something goes wrong, you still have the previous hard disk completely ready at hand.
117 992 342 45 145 825 518 1089 1157 741 1013 713 337 104 814 259 1375 622 1230 1487 66 375 1191 293 1008 522 1259 1127 1314 125 295 135 771 67 396 227 854 801 1145 1038 566 509 1025 731 1413 519