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.

learn more… | top users | synonyms

0
votes
1answer
265 views

Hardware RAID1 device is the wrong size/too small?

My motherboard has an Intel RAID controller. I set up 2x3TB HDD in RAID1 named "Home". This should make a single device that is about 3TB. This is what I end up with: # fdisk -l Disk /dev/sda: 240.1 ...
0
votes
1answer
201 views

CineRAID CR-H458

Has anyone used this external RAID enclosure? I would like to know if it is a true hardware controller meaning Ubuntu would have no problem recognizing the array as one drive. Thanks for any help!
8
votes
1answer
49k views

Software raid - mdadm - re-find my array

Description Today I plugged in another hard drive and unplugged my raid drives to ensure when I wiped the drive, I would not accidentally pick the wrong drives. Now that I have re-plugged in my ...
5
votes
2answers
10k 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 ...
2
votes
1answer
141 views

How to change the default location of /home/.encryptfs

Situation: I have a 2 large HDs setup in RAID 0 config and mounted in /raid (redundancy) I moved my /home to /raid/home. I hacked around configs to ensure that Ubuntu understands that I want my ...
0
votes
1answer
2k views

How to migrate from RAIDZ1 to RAIDZ2 using ZFS-native? [closed]

Last night I created a raidz1 array, however later in the evening I realised I needed to create a raidz2 (RAID5), is it possible to change the raid level of my array from raidz1 to raidz2 without ...
0
votes
1answer
531 views

How can I solve my RAID installation problems?

Trying to install Ubuntu Server 12.10 64-bit (also tried 12.04.1 64-bit LTS) with a RAID5 array but machine does not boot grub (I get the black screen with the blinking cursor), and I have tried ...
2
votes
0answers
246 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.
0
votes
1answer
107 views

RAID 0, new drive mirroring issues

Here's the run down: We have a 2 disk RAID 0 array. One of the drives failed and the other is marked as depreciating. We aquired a new drive, same specs as the old. To our thinking we simply replaced ...
2
votes
0answers
677 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 ...
0
votes
2answers
2k 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 ...
1
vote
0answers
193 views

2x SSD like one drive 12.10

I want to do a clean install of ubuntu 12.10. I got 2x 40GB SSD's. I want to have them like one drive. (like RAID0), is there a way to do this with LVM, in the graphical Ubuntu 12.10 installation? I ...
3
votes
3answers
17k views

How to setup a RAID Install with Ubuntu 12.04 LTS?

I have one pc that has two 120GB hard drives in it. There is currently no operating system installed in my PC. I want to install Ubuntu so it will see and use both hard drives for booting and storage ...
1
vote
1answer
1k views

Why is ext4's Journaling I/O usage so high when copying files to my RAID1?

This just barely started occurring and I feel like this is not a bug but a configuration error (hopefully). I'm on 12.04, 64-bit and have been happily stable for many months. My RAID1 is years old and ...
2
votes
1answer
872 views

Problem installing GRUB with dual boot Win7 on RAID

I use Linux at work and am pretty happy setting up and installing to new machines in several configurations, however I have to admit, this time I'm stumped! I have a nice new PC with an SSD Raid in ...
1
vote
1answer
9k views

How to make GRUB2 detect and boot Ubuntu on a RAID 1?

grub 2 is unable to detect /dev/md1 which is a raid 1 drive on my computer. When I press c in grub menu and run ls I get a list of all the drives but don't see md1 for booting Ubuntu which is on ...
0
votes
1answer
225 views

Copy entire filesystem in a folder where a raid-1 array is mounted

I am trying to migrate from a single disk drive system to a double disk drive software raid-1 system that already has a running system on it. Meaning that formatting and having a new installation of ...
-1
votes
1answer
626 views

Ubuntu 12.04 LTS installer support for fake RAID 1

I want to install Ubuntu 12.04 LTS alongside Windows 7. Should not be a big problem, but it just occurred to me that I am using a software RAID to mirror my disks (RAID 1). Now there is some ...
2
votes
0answers
395 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 ...
3
votes
2answers
3k 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 ...
0
votes
1answer
1k 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/ ...
1
vote
0answers
257 views

Building and migrating to software raid 5 array

I am hoping to build and migrate to a software raid 5 array. I am working with ubuntu 12.04.1 LTS 64-bit. I currently have three drives: /dev/sda1 which is a 60G solid state drive which contains ...
0
votes
2answers
6k views

How to install software raid 0 on ubuntu 12.04 server with mdadm?

I need to install a software raid-0 array on a Ubuntu 12.04 server with mdadm through commandline (SSH). The drive setup is as follows: SDA = OS SSD SDB = HDD for raid 0 SDC = HDD for raid ...
3
votes
1answer
1k views

RAID 5 reassemble stating wrong homehost?

So I went from a degraded RAID, to a dissasembled RAID, to now trying to reassemble it. Im getting a weird message when trying to --assemble the RAID. I have 6 drives, so /dev/sd[a-f]1. When trying to ...
0
votes
2answers
4k views

Ubuntu 12.10 “fakeRAID” RAID0 installation

I have 2 80 Gb HDD's with a RAID 0 motherboard configuration (Intel Z77, fakeRAID) with a 100 Gb partition running Windows 7 and a 60 Gb partition where I would like to install Ubuntu 12.10. However, ...
2
votes
3answers
806 views

Tips on setting up raid10 on *buntu

I'd like to set up a software raid 10 array (4x2TB) for a workstation using a fresh install, but I'm finding non applicable/conflicting/old resources online. I'd like to get the community's advice on ...
2
votes
1answer
2k 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 ...
1
vote
1answer
463 views

Need assist - Converting Windows Media Server to Ubuntu

I found this guide but have a few questions: http://dagolav.prestegarden.com/installing-ubuntu-on-the-hp-mediasmart-ex490/ I'm not a Linux guru yet, fairly new. I want to convert this sweet little ...
1
vote
2answers
218 views

Two different SSD drives, which one to mount for home?

I've had a 128GB toshiba SSD on my T400 and have just bought a new 240GB intel SSD (335 series). I want to have a clean new dual boot install of ubuntu and windows 7. With my SATA II system, the new ...
1
vote
0answers
2k views

Recovering from RAID5 with 2 failed drives, only one of them really dead

I have (had?) a RAID5 with 3 devices. One of them died, and after some days I experienced that the RAID stopped at all. However, I could restart it without experiencing any problems, but it stopped ...
1
vote
1answer
508 views

Is the Alternate Ubuntu installer still required for LVM or Software RAID setup?

Over the past 5 years, I have been setting up Ubuntu servers using the Alternate installer. I need to provision a new server today, and I'm curious if the Alternate CD is still the only way to setup ...
1
vote
1answer
312 views

Expanding Apple RAID 5 in terminal

I own a Mac Pro with an Apple RAID card. I set it up with three 1.5TB drives. I recently replaced one drive with a 3TB drive and now want the volume to expand to meet the new capacity. The Apple ...
1
vote
2answers
114 views

Is there a way to upgrade a machine which is using software raid and LVM to 12.10?

I realize Ubuntu has dropped the alternate cd for 12.10, which broke this long-time user's heart. I always do a fresh install when upgrading, but I have software raid and LVM, and as far as I can tell ...
0
votes
1answer
731 views

ubuntu 12.04 and/or 12.10 can boot from software raid5?

I read from a very nice post (http://forevergeeks.com/setup-ubuntu-server-with-raid-5/) that ubuntu cannot boot from a raid 5 partition. Since the post is quite old I wonder if this is still true or ...
1
vote
1answer
5k views

disks not ready in array causes mdadm to force initramfs shell

Okay, this is starting to get pretty frustrating. I've read most of the other answers on this site that have anything to do with this issue but I'm still not getting anywhere. I have a RAID 6 array ...
2
votes
3answers
7k 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 ...
0
votes
2answers
7k 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 ...
2
votes
2answers
609 views

Dual Boot (Ubuntu and Windows 7) on a RAID SSD's with UEFI [duplicate]

I recently bought an Sony Vaio SVS13A1V9EB, which has a RAID between two 64 GB SSDs and a Hybrid-graphics. (Major Issue) I want to have Windows 7 (It is preinstalled) and Ubuntu on this notebook i.e. ...
13
votes
4answers
20k views

Installing 12.04 server as a software RAID 1 mirror fails to boot

I'm installing a few new Ubuntu Server 12.04 LTS servers, and they have two 512 GB SSDs. I want them to use software RAID 1 mirroring, so I was following this document religiously step by step: ...
0
votes
1answer
793 views

How can I create a 4TB partition on my software RAID5 device?

I have set up a RAID5 device with three 2TB hard drives using mdadm. The device was successfully created, but I cannot seem to create a partition on the device. When I try to make an ext3 or ext4 ...
1
vote
1answer
284 views

High CPU load for 1:30 minutes when mounting ext4-raid partition

--> The problem solved itself <-- Sometime between November 2012 and January 2013 one of the Ubuntu updates made the time the mount command takes to complete go down to ~1 second again: time ...
1
vote
1answer
909 views

How to solve Critical Logical Driver

I was checking the logs in server when i came across this message. Nov 4 12:52:05 SERVERNAME ServeRAID Manager Agent: [338] Periodic scan found one or more critical logical drives: controller 1. ...
1
vote
2answers
2k views

Installing Ubuntu Server 12.04 on HighPoint RocketRAID 2720SGL RAID 5

I've installed a HighPoint RocketRAID 2720SGL card that I've connected 3 x 1.5 TB HDDs. After creating a RAID 5 within the RocketRAID BIOS using the 3 disks, I am attempting to install Ubuntu Server ...
2
votes
2answers
6k views

Ubuntu Server 12.04, MDADM device number suddenly changes?

I'm facing a really annoying bug, I have set up a Software RAID1 with mdadm, and the setup went just ok with this results /dev/md/lucas.mgscreativa.com.ar:0 I have also configured mdadm.conf ...
2
votes
1answer
375 views

New hard drive not recognized on a Dell Adaptec 2610SA 6 port SATA RAID PCI card

I have a Dell Adaptec 2610SA 6 port SATA RAID PCI card with 3 hard drives on it and everything works fine. I plugged another hard drive to it and the system (Ubuntu 12.04, 64 bit) seems not to ...
1
vote
2answers
712 views

Software raid5 recovery

I'm very new to Ubuntu and Linux in general, so please forgive my noobness. I'm running an Ubuntu server, where the OS is installed on a SSD drive. In addition, I have 4 other drives in a software ...
0
votes
1answer
350 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
votes
0answers
523 views

raid device name and UUID changed after power failure

After a power failure, my machine comes up but doesn't mount the raid disk because it isn't found (correctly). Using mdadm --examine on the partitions making up the raid device, I found that they are ...
2
votes
1answer
2k views

Cron script to detect degraded raid array?

To my surprise, my raid array entered degraded mode some time ago. How can I set up a cron job to warn me? I've tried from the mdadm man page: Running mdadm --monitor --scan -1 from a cron script ...
4
votes
1answer
4k 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 ...