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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Ubuntu 12.04 installer does not see Windows already installed on my computer [closed]

When I just tried to install Ubuntu 12.4 alongside Windows 7 on my new "HP Pavilion 64k desktop with Windows 7" computer, Ubuntu said this computer has no detected operating system and someone ...
23
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4answers
74k views

How do I install GRUB on a RAID system installation?

I'm trying to setup and install Ubuntu on a RAID 1 setup. I have two disks, sdb and sdc. I've been following this guide https://help.ubuntu.com/community/Installation/SoftwareRAID which more or less ...
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2answers
12k views

Setting Up RAID During 13.04 Install

I am attempting to install Ubuntu 13.04 Desktop on RAID 5, but I can't figure out how to do it. I have read that it can be done during the install, though I haven't found a good explanation of how ...
2
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3answers
39k views

MDADM Superblock Recovery

After a power cycle I found my RAID 5 Array no longer working. I tried various methods to reassemble the array but nothing has worked so far. I believe I need to recreate the superblocks and UUIDs ...
7
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2answers
6k views

How to implement RAID 1?

How to set up RAID 1 [software, hardware or fake] on Ubuntu 12.04 desktop?
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2answers
2k views

Server stuck at black screen after reboot

I recently put together a new server running Ubuntu Server 11.10 and it's all working great except for one little detail. Whenever I run "sudo reboot" everything works fine until I get to the grub ...
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1answer
4k views

Can I cache an mdadm raid with an ssd?

I have a 1TB array set up in raid 1 using mdadm on Ubuntu 8, to store mission-critical files. I'd like to speed up read/write, especially for large files by caching to an SSD. Is this possible? Does ...
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2answers
4k views

Dual-Boot Ubuntu 14.04 and Windows 7 on FakeRAID Installation error - question marks “????…”

I am trying to install Ubuntu 14.04 on FakeRAID along Win7. Win 7 has been already installed, and dmraid is running. During the installation I choose to manually partition, this is the structure: ...
13
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4answers
38k views

How do I align my partition table properly?

I am in the process of building my first RAID5 array. I've used mdadm to create the following set up: root@bondigas:~# mdadm --detail /dev/md1 /dev/md1: Version : 00.90 Creation Time : Wed ...
7
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1answer
16k views

Not enough components to start the RAID array?

I'm trying to retrieve data from a "Western Digital MyBook World Edition (white light)" NAS device. This is basically an embedded Linux box with a 1TB HDD in it formatted in ext3. It stopped booting ...
2
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0answers
9k views

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 ...
7
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4answers
11k views

Well supported Hardware Raid Controller

I am currently planning to buy a hardware-raid controller. This became necessary since I am running Linux and Windows in parallel and now need the redundancy for both OS (Im am going to use RAID1 / ...
7
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4answers
7k views

Is having the 'swap' partition at the 'beginning' better than at the 'end'?

I recently installed Ubuntu 11.04 onto a RAID0(stripe) device using the alternate installation disc and manually partitioned the HDs ext4 and swap partitions; during this process, I was reading in a ...
6
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1answer
4k views

How to set up SSD raid and TRIM support?

I am looking to set up a new server. I can only use Intel 520 Series 240gb MLC ssds or standard Seagate 7200rpm disks. These are the non negotiable options. Naturally, as this is going to be running ...
0
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1answer
306 views

12.04 unable to boot on /sde, upgrade-grub and boot-repair failed

My problem is I've 4 disks in a raid array listed as sda, sdb... sdd and grub 2 refuses to boot on /sde (the 5th disk, standalone and containing a clean install of 12.04 LTS). I tried all solutions ...
0
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2answers
5k views

How do I recover my RAID partition after the Ubuntu 11.04 upgrade?

My RAID drive was working well with Ubuntu 10.10, but after doing an upgrade I am no longer able to mount my RAID drive. I think it is due to a invalid RAID description similar to this problem: ...
3
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1answer
4k views

How to install Ubuntu 12.04 server with RAID1?

I have spent the last 4 days or so trying to setup Ubuntu server 12.04.2 with RAID1. I have looked at several different links and tried different configurations and workarounds. So far, I have not ...
3
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2answers
3k views

Installing Ubuntu with Fake RAID 1

I had: Software: Dual boot with Windows XP Ubuntu 10.04 LTS x32 Hardware Fake RAID 1 (mirroring) with 2x1 TB: Partition 1 - Windows Partition 2 - SWAP Partition 3 - / (root) Partition 4 - ...
2
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3answers
118 views

Can I install ubuntu 14.04 on my RAIDed desktop?

I think I heard that RAID was removed from the Ubuntu installer recently. My system is currently made up of a series of RAID1 arrays: one for 12.04, with /home mounted on a separate partition/array. ...
2
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1answer
823 views

Ubuntu 13.04 Server Installation With no RAID option?

I'm installing Ubuntu 13.04 Server. When I get to the partition manager, I select Manual. When I click on one of my disks that I want to use as a RAID partition, the option doesn't exist. Can you not ...
2
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3answers
4k views

raid advice with SSD and two HDD

I have a new machine with one 128GB SSD and two 1TB HDD. On the SSD is the OS and my initial thought was to put the two HDD in RAID 1 for user data. After some more thought I came up with two other ...
2
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1answer
3k views

Unable to Install GRUB in /dev/sda on raid drives

I'm trying to install 12.04LTS on a server but keep running into the unable to install grub error like so "Unable to Install GRUB in /dev/sda". The drives are in raid1 and I'm using fakeraid on a ...
1
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1answer
84 views

Two partition tables are unrecognized

While trying to installing Ubuntu 14.04 as my sole operating system, I've been encountering a number of issues (Described in more depth at Ubuntu 14.04 installation crashes with "???" ...
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1answer
2k views

Installer Only Recognizes 801GB of a 3TB RAID1 Array

I've been searching as best I can for this precise problem, but the only place I found it exactly was here, and I don't think that the OP ever got an adequate answer. Most of the issues I've seen ...
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2answers
4k views

Add two new HDD in Raid 1

I just made a fresh install of Ubuntu 12.10 on a new SSD (/dev/sda). Now I would like to add two 1TB drives (/dev/sdb /dev/sdc) in RAID 1 but I'm pretty clueless on how to do it. This is what I came ...
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4answers
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How can I quickly copy a GPT partition scheme from one hard drive to another?

On a non GPT partition table I can do sfdisk -d /dev/sda | sfdisk /dev/sdb. But sfdisk doesn't support GPT partition tables. What can I use instead? I'm looking for a one or two command solution, ...
5
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2answers
5k views

Rebuild mdadm Raid5 after OS hard drive died

I have an ubuntu desktop 10.4 "server" with 5 hardrives. 1 of the hardrives had 3 OS's on it (Windows Vista, Windows XP, and Ubuntu 10.4). I primarily used the ubuntu OS so that I could use mdadm and ...
3
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2answers
4k views

Should swap and RAID-1 mix?

I have a box with a small RAID-1 array being used for swap space. I only did this since I was setting up mirrors for every other partition in the system. Today I read this question and it prompted ...
3
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2answers
14k views

Improving mdadm RAID-6 write speed

I have a mdadm RAID-6 in my home server of 5x1Tb WD Green HDDs. Read speed is more than enough - 268 Mb/s in dd. But write speed is just 37.1 Mb/s. (Both tested via dd on 48Gb file, RAM size is 1Gb, ...
10
votes
7answers
17k views

How can I physically identify a single drive in a RAID array?

I have an external drive bay with 4 eSATA disks in it. My system has a 4-port eSATA card, as well as a pair of internal hardware RAID1 drives. The external drives are in software RAID1 pairs as ...
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2answers
2k views

Is there a Linux software RAID that can be shared with a windows installation?

What are the options I've got when it comes to RAID and Windows?
4
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4answers
1k views

Can I create a 4TB Raid 1+0 volume?

I'm thinking about setting up a NAS based on Ubuntu server, but before I invest the money, I want to make sure what I want to do is possible. What I'm thinking is a 4x2TB Raid 10, so my usable ...
3
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1answer
1k views

How to setup Ubuntu on a Motherboard Raid, no alternate image

This is something that took me an extraordinary amount of time to iron out, and the literature is distributed over several websites. I also didn't like the idea of doing it through the alternate CD, ...
2
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1answer
1k views

Setup of two additional SSD drives in RAID 1

I have an ubuntu 12.04 setup with two HDD that is setup in a software raid 1. Now I need to add two additional SSD drives for separate storage of some database files. They need to be setup in their ...
2
votes
2answers
5k views

Delete mdadm array but keep data

I have a two-disk mdadm RAID1 array. One of the disks has died so the array is in a degraded state. It's been like this for a while and while I didn't mind getting the occasional email through, ...
2
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1answer
3k views

How can I create a software RAID drive and install Ubuntu Desktop on that drive?

Since GParted does not support RAID, what tools can we use to create a RAID drive (0,1,5 etc) and then install Ubuntu onto that drive? Assume we are starting on fresh system with no OS.
4
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1answer
2k views

GRUB could not find Windows 7 after installing Ubuntu - RAID 0

I just purchased a new computer with two 256 GB SSDs configured in RAID 0. It came pre-installed with Windows 7, but I wanted at least one Linux distribution installed as well. So, I tried ...
4
votes
3answers
5k views

RAID 1 array not found in server installer

So I'm trying to install the last version of Ubuntu Server 11.10 64bits on my server ( replacing Windows Server 2008 completely ). Since I need more Sata ports, I bought a PCI Sata RAID Controller ...
4
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1answer
2k views

Dual Boot Ubuntu 11.04 / Vista 32 with a RAID 0

I tried to install Ubuntu 11.04 several time using all the informations I could gather on the web. But I still fail to install it, and as my Vista partition contains very important informations I ...
3
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1answer
119 views

App indicator for software RAID running degraded?

Anybody know of a Unity indicator that will indicate if any of my software RAID arrays are running in degraded mode? Really would be awesome...
3
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2answers
15k views

“Special device does not exist”

I have 3 hard drives in my machine. Two of them are 1TB drives with my old home partition on a software RAID1. I installed an SSD as a 3rd drive with a fresh Ubuntu 10.10 currently running. I now try ...
3
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1answer
535 views

Is it normal that mdadm has to start from scratch when I restart my computer while it's rebuilding the third disk?

I've installed a RAID5 using mdadm yesterday. Since then it has been rebuilding. I just restarted my computer and it started rebuilding the RAID from scratch. (Had 60% before.) Is this normal or are ...
2
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1answer
7k views

How to install Ubuntu Desktop 13.04 with mirror RAID?

I've now spent hours trying and failing to figure out how to install Ubuntu Desktop 13.04 on my new desktop while setting up RAID as part of the installation. I tried following the following two ...
2
votes
1answer
649 views

How to remove swap from RAID1 Array?

Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration? According to the Ubuntu Advanced installation guide, here, it said to add swap to the raid but I am having ...
2
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2answers
7k views

Restoring GRUB2 on Software RAID 0 using LiveCD after Windows 7 wiped it

I have installed Ubuntu 10.10 on my system. However, I need to install Windows 7 back, and I expect that it would alter GRUB and it did. Right now, my partition on my Software RAID 0 looks like this: ...
2
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1answer
3k views

Move RAID1 to new machine [closed]

I have an older server with / on one hard drive and /srv on a RAID1 partition, which I remember took some time to set up (I set it up after the installation). I will be installing Ubuntu 10.04 onto a ...
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0answers
22 views

Error on choosing location while freshly installing 14.04 [closed]

I'm trying to install 14.04 on my desktop and am running into this error after going through the partitioner. Error screen: Additional information: My system has da fake raid array (Raid 0). ...
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2answers
1k views

Installing problems with Dell Vostro 3460

I'm having problems installing 12.04 or 11.04 in a new Dell Vostro 3460. The issue becomes on the "Raid" performance that comes with the laptop, a 500GB HDD and a mini SATA 32GB SSD. With Windows ...
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1answer
4k views

Is a disk/ata timeout exception dangerous?

I have a few hard drives in mdadm RAID 5 configured to go to standby after a few minutes of inactivity. (Using hdparm.conf spindown_time.) At irregular intervals I get messages like these in dmesg: ...
0
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1answer
76 views

How to partition for a successfull boot with raid5 + lvm +encryption

I have been trying to make this setup work for several days. The system never boots... When I do a setup without the software raid I can get it to work. How should I set up my system partition to be ...