Is grub installed to all the mbr of a raid array by default by the. This document contains installation instructions for the debian gnulinux 6. Its a little late since the server has been repurposed. This howto briefly describes how to install debian etch on lvm2 on software raid 1.
This guide explains how to set up software raid1 on an already running debian squeeze system. Disk partitions devhda1 and devhdc1 will be used as the members of the raid array md0, which will be mounted on the home partition. Actually this works in debian squeeze and has for over a year. Installing grub2 on mdadm software raid in debian wheezy. Get a debian installation cd for the same architecture i. Windows software raid is weak and many windows people end up with fakeraid as their introduction to software raid and get burned. Heres a quick way to calculate how much space youll have when youre complete. If i use the debian stable squeeze installer to install debian, booting from a raid1 pair of drives, does it write grub to the mbr of both drives if not, how should i best protect against a drive failure if i just clone the mbr wont it still point to the failed device. Raid5 requires a minimum of 3 drives, and all should be the same size. Howto create software raid 1 mirror on debian linux a raid1 array on linux is fairly straightforward to setup.
Hot swapping scsi drives is not directly related to software raid, but it. Raid recovery starts and you check the status with. Howto create software raid 1 mirror on debian linux. 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. The example below shows how to create a software raid1 array on debian systems. How to set up software raid1 on a running system incl. This time around, i will show you how to configure the software raid using debian. As you probably wanted the raid array as contingency plan, you probably want to. First of all, boot the machine up and get access to the root partition. My guess is that it all depends on the type of raid. So, i cant see how anyone can use the debian installer to setup raid. The installation went on, but on reboot, i get a grub shell and i am stuck.
Some of these installation images may no longer be available, or may no longer work, and you are recommended to install wheezy instead. Grub works with software raid1, so long as grub is installed on each disk. Here we will use both raid 0 and raid 1 to perform a raid 10 setup with minimum of 4 drives. Ok, so i found solution of my problem booting from mdadm raid1. I get through the initial setup of the, hostname, fully quilified domain name, root password, new userpassword setup, and i get. In enterprise systems, software raid is standard and hardware raid is uncommon. This post documents the steps i followed to retrofit raid1 into an existing debian squeeze installation. Linux mdadm raid is very enterprise class, but you still have to know what you are doing.
To setup raid 10, we need at least 4 number of disks. As it turned out, this process was simpler then i initially expected. 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. To install grub 2 on both mirrored drives in raid 1 configuration on debian 6 squeeze, type this.
This also can be applied to ubuntu system as their are based on debian platform anyway. Im trying to setup and install ubuntu on a raid 1 setup. If i use the debian stable squeeze installer to install debian, booting from a raid1 pair of drives, does it write grub to the mbr of both drives if. Cant boot newly created mdadm software raid in debian linux. 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. How to migrate a single disk linux system to software raid1. How do i install grub on a raid system installation. How to set up software raid1 on a running lvm system incl. Just getting the raid array to work is good but not enough. Raid 10 is a combine of raid 0 and raid 1 to form a raid 10. The debian squeeze installer allows for raid setup, but then tries to install grub2 to devsda instead of devmd0.
Having the lvm in a different raid device is the most important part i guess. Luckily the fix is not that difficult as it only requires a few additions or possible alterations if you. Today i will share some thought on software raid under linux with you. 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. Software raid on debian linux 14 january 2010 on hardware, filesystem, mdadm, monitoring, raid, linux. Setting up raid on an existing debianubuntu installation. How to configure software raid1 during installation process.
Before you start, make sure the following packages are installed. I do not issue any guarantee that this will work for you. This guide explains how to set up software raid1 on an already running lvm system debian squeeze. This can be done directly from the official etch dvd, without having to install the os on a classical partition and then move it to a lv residing on raid. I already managed to configure and install a debian squeeze software raid, but, will the grub boot loader be installed in both disk, or should i do that manually. Im quite ashamed that it took me so much time to figure this out, because its. As i mentioned earlier, the software raid configuration can be quite troublesome and time consuming, but at least it is reliable and save a lot of cost when buying a hardware. Enjoy debian with the raid set up for both boot and data such that even if one disk crashes you will be able to restore your configuration do not forget to give to your new disk partitions identical to the old disk and to copy grub to the boot partition if necessary.
Grub2 configuration debian squeeze 1 preliminary note. Using other tools has issues too below but regardless, they reformat the partitions, so i. The problem is at the end of the installation, it tries to install grub. Installing grub2 on mdadm software raid in debian wheezyjessie. Previous post common commands for foundry switches and load balancers next post how to install a pptp server on debian squeeze. It provides the ability for one drive to fail without any data loss. After first boot, consider executing dpkgreconfigure grubpc or dpkgreconfigure grubefiamd64 on efi systems, and install to all devices. The most important tool for setting up raid is mdadm.
Im not aware of support in grub to declare two disks as being in a raid1 array so that grubinstall would automatically write to both. It appears pure software raid, but just to be sure. 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. Unfortunately older versions of partman do not properly setup a disk with gpt when the disks are part of a software raid. Sometimes you need to store data relative save and high available. If you create a new raid device debian will not notice it on boot unless you also update the file etcmdadmnf.
Our team at linuxforce recently put together a debian server with lvm on a software raid5 volume. Debian squeeze nvidia packages debian squeeze install microsoft ttf truetype fonts solved debian killall command not found solved fuse. Fixing an unbootable computer after a failed grub installation can be a bit tricky. After using mdadm assemble scan i have 4 new partition md1, md2, md126 and md127. Debian software raid1 without recompiling mini howto. Recover software raid1 after hdd failure on debian squeeze. How to configure a soft raid1 using debians wheezy b4. Debian user forums view topic solved squeeze, grub2.
Debian server does not get to grub on boot possible raid. Make sure that your grub configuration doesnt hardcode disks like hd0, but instead searches for the boot and root filesystems uuids. Filesystem size used avail use% mounted on devmd2 1. Grub2 has the ability to assemble raid arrays and read from them. Changed bug title to add news item about endoflife for old raid format from grubpc grub2 2. When asked to install bootloader, install to first device. In our earlier articles, weve seen how to setup a raid 0 and raid 1 with minimum 2 number of disks. What you should do is install grub to the raid array, eg devmd0. This document gives an example on how to setup a clean linux system which can boot directly from a software raid device. Permission denied sshfs debian linux netbook laptop raspberry pi power saving with acpitool apache mysql php quick build set up git repository on debian and push changes from. I am attempting to install debian using the software raid raid 1. So, is it possible to have grub2efi work on lvm over raid1. Still its a good idea to try this option in case the lighting strikes the same place twice.
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