RAID stands for redundant array of independent disks, and allows for disks to be linked in various ways. Common RAID setups in Ubuntu are a hardware RAID, FakeRAID and software RAID.

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How to re-add accidentally removed hard drive in RAID5

I have a NAS on Ubuntu Server with 4 2TB hard drives in RAID 5. A couple of weeks ago, one of the hard drives died, but my RAID was working, although degraded. Luckily it was still under warranty and ...
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220 views

lvm disappeared after disc replacement on raid10

here my problem: I am running ubuntu 12.04 on a raid10 (4 disks), on top of which I installed an lvm with two volume groups (one for /, one for /home). The layout of the disks are as follows: Disk ...
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How to remove encryption from volume during installation

I'm currently in the process of installing Ubuntu Server 12.04 onto a fresh build. I have two 3TB hard drives that I'd like to run in software RAID 1, and was following this tutorial. During ...
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409 views

Ubuntu 12.04 and Windows 7 dual boot on ssd + hdd raid1

Despite reading dozens of HowTos and so on I am getting crazy about trying to get my dual boot system running. Maybe you can help me. My system: Asus Z87-pro motherboard with UEFI Samsung 840 Pro ...
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A Guide to Install Ubuntu 13.04 using a RAID 0

Getting the error: Unable to install grub in /dev/sda? Because you are using a BIOS/fakeRAID0? If you manage to find this thread consider yourself in luck. I spent the last 48 hours trying to figure ...
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134 views

problem booting with failed software RAID 1

I have been experimenting with a software RAID 1 installation of ubuntu 12.04 LTS in virtualbox, but am having some issues here. What I basically did: 2 disks in RAID 1. Both disks contain a ...
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70 views

RAID 5 array mdadm add command no response

On ubuntu server, I have a software RAID 5 array, four 2TB drives. One of the drives died, I sent it in and got a replacement. I put the replacement in my server, used an sfdisk command to set the ...
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37 views

Strange RAID disk volume usage

I have Ubuntu Server 12.04, and my disk is full. I don't know why; my files don't use more than 5GB. Filesystem Size Used Avail Use% Mounted on ...
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42 views

I grew an array with mdadm but I can't see the progress?

Today I added a 5th drive in my array, I did the following: mdadm --add /dev/md0 /dev/sdf1 My drive was added as a spare, I then did: mdadm --grow /dev/md0 --raid-devices=5 But when I want to ...
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141 views

Will Ubuntu spin down harddrives in an RAID 10 array?

I'm about to buy parts for a new home server and I'm planning on using Ubuntu(perhaps 12.04 LTS) For the OS, I'll use an SSD. For cold storage(big files, rarely accessed), I'm planning on setting up ...
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947 views

Installing 12.04LTS Server on a Fake RAID10

Scenario Install Ubuntu 12.04LTS Server on a RAID10 with boot on a RAID1. 4 - 2Tb SATA Hard Drives 3 Partitions (/boot, /, and swap) boot (256Mb from each disk) setup in RAID1 /dev/md0 partition ...
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184 views

How to choose LVM mapping mode when installing Ubuntu server 12.04?

I would like to create a volume group with striped mode on top of 2 RAID-1 devices. The issue here is I cannot choose striped when configuring LVM at installation stage. It's always be linear.
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340 views

Fixing broken raid0 with dmraid?

A while ago when I was still on Windows I had two secondary 1 TB hard drives that used a raid0 setup, fakeraid I believe with Intel. My primary hard drive died which seemed to have messed up the raid ...
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216 views

How do I mount disks with an Adaptec RAID controller on a dual-boot machine? (error code 12)

I'm trying to migrate from Windows to Ubuntu 12.04, dual-booting at the moment. One problem I am facing is the RAID controller, I'm not able to mount any of the drives connected to it. (The OS is up ...
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981 views

New computer, same RAID. MDADM won't assemble

Ubuntu 12.04 64. Hardware failure (motherboard) led me to build a new machine, and I took the opportunity to do a fresh install of Ubuntu (first one was a learning experience). I moved the raid disks ...
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636 views

12.04 does not boot from the disk after installation

Installed Ubuntu on HP xw4600 workstation using CD not USB. But after installation it does not boot from hard drive. During installation it showed: The entire disk will be used: ...
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How do I get GRUB to install on a RAID array?

I am trying to build an Ubuntu desktop machine with RAID array, and am having trouble with the installation of GRUB. The 2 10GB HDDs are partitioned using sgdisk (invoked by a script to ensure ...
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47 views

Change initramfs script

I made RAID 0 by mdadm'ing partition located on dmraid VIA VT6421 and Western Digital hdd. Installed Ubuntu on that RAID. Now, when I boot, I get (initramfs) ash prompt. There, I have to write mdadm ...
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40 views

Ubuntu 12.04 ext4-fs error/inode

I am running a Dell PowerEdge T420 with Ubuntu 12.04 32bit. The hard drives are a RAID1 setup. Last week, I began getting errors that cause the build I am running to fail. I found this in the log ...
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RAID6 Ubuntu rebuild - how to calculate best parameters for fastest rebuild

I am doing a resync on a RAID6 array and I am looking at some 2 days to complete. I looked here for hints on how to speed it up, but I have, instead, managed to slow it down! HW details are: 10x 4TB ...
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25 views

All data gone from healthy raid5 array

I have an issue with my Raid 5 array that is puzzling me. The PC crashed yesterday and after a reboot my raid 5 array was empty. cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [linear] ...
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Disabling windows only features (Intel SRT, etc) so I can install Ubuntu (Dell XPS 15)

I'm working on installing Xubuntu on a Dell XPS 15 and I trust this guide. It says I should do the following: Turn Secure boot off. Turn Fast boot off. Turn Intel SRT off. Remove RAID meta-data ...
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29 views

GRUB error with RAID when other HDD's exist

I had this exact issue with Debian. Grub has no issues loading at all as long as all of my HDD's are turned off except for my hardware RAID array. When there's more than just my RAID, it fails to ...
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46 views

Syncing/Mirroring two partitions (Sata, USB) : RAID or not?

My 12.04 Ubuntu server has a 120Go internal SATA sda5, ext4 partition. I also own a 500 Go USB2 external hard-drive from which I could easily free 120 Go. Now, I've been meaning to set up mirroring ...
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163 views

using GRUB to boot a linux system on a different device?

I bought a new SSD drive with the idea of running my Ubuntu system on it and leaving the other two SATA drives (which are configured in a RAID array) for storage only. Ubuntu installed with no ...
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57 views

mdadm array: there is not enough space on the disk

I have this array of approx 6TB (ext4) and i am getting a disk space error. I only have a total of 800GB to copy to the shares I have created. I am using robocopy to copy this data from a windows ...
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25 views

How to fix broken upgrade on Ubuntu Server on USB thumbdrive with Encrypted LVM

Oh woes is me: I decided to do a do-release upgrade on my workstation and managed to bork my production workstation. My setup was as follows: 32GB usb key that Ubuntu Server booted from - this ...
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134 views

Ubuntu 12.04 Raid wont assemble after move to new PC

Alright, so I swapped the system board out on my server running Ubuntu 12.04. The OS is on its own drive, and then I have 1 storage drive, and 3 drives in a Raid 5. Well, when booting up with the new ...
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102 views

How do I get /home to mount?

My PC has 6 drives. /dev/sda, /dev/sdb, /dev/sdc and /dev/sdd are 750Gb SATA drives. Each drive has one partition filling the complete drive (/dev/sda1, /dev/sdb1, /dev/sdc1, and /dev/sdd1). These ...
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205 views

Sony vaio vpc-z1 operating system not found

I have a Sony Z1 laptop signature series that is saying operating system not found When I try to start up the computer. On start up I pressed the F3 button and it shows the Samsung SSDs as error ...
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Can I create partitions and encrypt a couple of them for ubuntu 12.04.2 installation???

I am trying to install Ubuntu 12.04.2. I have onboard RAID with 2 identical solid state drives bought at the same time and that's ok, because ubuntu recognizes them as one disk. However, I want to ...
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262 views

Raid Issues Cannot Boot and Getting Superblock Errors

I am getting the errors below. How do I get the RAID array fixed. I'd like to get it mounted via the live cd that im booted into as well. Just so I can backup a few items. My setup boots from the RAID ...
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136 views

Setting up Cluster Configuration using an existing web server as a Primary Node?

We currently have a Primary node, which resides in the US within a Datacenter, but we are going to be using this for all serious bandwidth and resource intensive websites, and through a configuration ...
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300 views

MDADM Raid Array Fails to Mount On Startup, OK on Dynamic Access

First off, thanks for taking a look - I've tried to tackle this problem more than once to no avail. The long and the short of the back-story (though I can't recall specifics because it's literally ...
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123 views

mountall problem on RAID

I installed Ubuntu Server 12.04 x64 with a software RAID 1 and had to run boot-repair to make the system bootable. Now everything seems to be ok except that it throws following warnings during each ...
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58 views

How to install Precise Pangolin as a second OS on a PC with a RAID?

I want to install Ubuntu as a second operating system beside Windows XP SP3. My main PC has a mainboard based on the nVidia nForce4 architecture with an onboard (mainboard) nVidia RAID controller, 4 ...
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72 views

Alienware M18xR2 raid slow write ubuntu 12.04 32bit

12.04 32bit alternate installer worked fine for alienware M18xR2 with a RAID0 configuration with 2 SSD drives, but writes are SLOW! Best case is barely more than 1MB/sec, as timed by dd command: ...
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306 views

Ubuntu Server 12.10 -> 13.04 Upgrade & MDADM Raid Arrary

Now that 13.04 is out - i am looking to upgrade my home server (test rig) to have a play. Just wondering what effect running do-release-upgrade Would have on my MDADM raid array? Would it survive ...
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24 views

Install different RAID

Now I have running server (samba) Ubuntu 12 with raid 1 (2x250GB). It's running well, but I will add new hardisk 2x(1TB). I would like to know this new hardisk will be running raid 1 too. Is it ...
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113 views

ubuntu 12.04 not booting

I have installed ubuntu on 2 brand new 1TB hd's (raid1 config) using a boot cd. The install seems to have completed correctly but it wont boot. Using the boot cd and "try ubuntu" I can see all the ...
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588 views

Ubuntu 13.04 will not erase previous Ubuntu with RAID

When trying to do a clean installation of Ubuntu 13.04 on a system that has a RAID controller and RAID5 volume set and also had Ubuntu 11.04 installed will not allow me to delete the RAID or even ...
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71 views

MD arrays mounted incorrectly (no rwd)

I've got various RAID 1 & 0 (MDADM) arrays mounted in /media/ via fstab but I'm coming into trouble creating/deleting files from some of these volumes from the GUI and programs, it's as if they ...
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438 views

Is there a fix for md raid failure on 12.04

I've got a system that ran cleanly on Ubuntu 10.04 LTS. Upgrading to 12.04 LTS / 12.04.1 LTS / 12.04.2 LTS has been unpleasant and unsuccessful. Install goes cleanly and I have installed as follows: ...
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571 views

Dual booting Ubuntu with windows 8 on machine with SATA ssd cache controller ( DELL XPS )

System info: Dell XPS 8500 SE with 2TB HD and 32GB SSD SATA RAID cache Hello, I have been at this project for a couple days now and have hit a brick wall on researching the issue. I can't find an ...
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400 views

broken raid 1 array - I think I messed up

I have a big problem with my raid setup. So if anyone is interested, please help... I have a raid1 setup with 2 hdd. One day I saw in the SMART data of one on the disks that it had some bad sectors, ...
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151 views

How to access Intel Matrix RAID 0 from installed system (live USB had detected it automatically)?

I have Intel Matrix storage drive that have 2 hard drives installed in stripe. When I boot computer with Ubuntu 12.10 live (from USB) I can access this "virtual" drive from RAID. After installing ...
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303 views

DMRAID issues with Intel Matrix Storage (NTFS)

I have a RAID 5 array set up in Windows 7 using the Intel Matrix Storage Manager, which is, to the best of my knowledge, known as "FakeRAID". I installed Ubuntu 12.04 LTS side-by-side with W7, and I'm ...
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155 views

How do I setup RAID5 on 12.10 server without including system boot disk (after install)?

I have installed Ubuntu 12.10 Server on my HP Microserver. I installed it onto an SSD and now have 4 1TB HDD which I want to configure as RAID5. How do I go about doing this, can I do this from the ...
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336 views

Restoring RAID after linux installation

After Years using windows and wishing to enter the linux world, I recently installed Ubuntu 12.04. I have a Dell vostro 3460 with: 500 GB HDD 32 GB SSD mSATA (cache - not physical drive) My ...
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131 views

How to prevent Ubuntu from assembling degraded RAID on boot?

I have RAID 5 on 3 hard disks, in which one of them is external on USB 3. I'm facing problems on boot because sometimes the external drive isn't detected or maybe isn't ready soon enough, and the RAID ...