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 ...
22
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4answers
65k 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 ...
2
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3answers
34k 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
5k 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
1k 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 ...
4
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2answers
10k 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 ...
4
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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 ...
13
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4answers
35k 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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4answers
10k 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 / ...
10
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7answers
14k 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 ...
4
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4answers
6k 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 ...
0
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1answer
297 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 ...
2
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1answer
786 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 ...
1
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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 ...
24
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4answers
26k views

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, ...
7
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1answer
15k 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
7k 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 ...
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
3k 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
13k 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, ...
5
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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?
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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
4k 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, ...
4
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1answer
1k 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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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 - ...
3
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1answer
113 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
14k 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
votes
1answer
512 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
votes
1answer
585 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
votes
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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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 ...
1
vote
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
votes
1answer
477 views

How can I set up FakeRAID/SoftRAID using mdadm without losing data?

There is RAID0 of 2 drives connected through Silicon Image 3132 SATA SoftRAID controller. Under Windows it was partitioned as one dynamic GPT-disk having 4 TB NTFS volume. There is a lot of music and ...
0
votes
2answers
789 views

Would Mdadm be faster than fake raid adapter?

I just bought myself 2 x 3tb wd red drives and a startech 4 port raid card . Unfortunately, I have a very, very strong suspicion that this is a 'fake-raid' card as it is not from any of the main ...
0
votes
1answer
901 views

SSH Commandline - Ubuntu x64 dedicated server raid-0 array creation LOG [ After reboot : Disk /dev/md127 doesn't contain a valid partition table ]

I followed this tutorial but failed as it seems, i tried for a couple times, here i throw the towel: ht-tp://www.rustyrazorblade.com/2012/07/setting-up-raid0-in-ubuntu-12-04-in-aws-high-io/ ...
0
votes
2answers
3k 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 ...
0
votes
2answers
825 views

RAID 10 not being found by installer

I had ubuntu installed with raid 0 enabled. I have added 2 more disks went into the bios deleted and created a new raid setup using raid 10 (total of 4 disks now). However during install of ubuntu ...