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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RAID device not detected

I create RAID10 using "mdadm --create ... --metadata=0.90 ...". There are four partitions which I name from /dev/md128 to /dev/md131. First thing strange is that mdadm automatically changes them from ...
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138 views

Raid10: how to tell which disks are in mirror?

When I do "cat /proc/mdstat", there seems no such information as to tell which disks are in mirror. % cat /proc/mdstat md126 : active raid10 sda1[0] sdd1[3] sdc1[2] sdb1[1] ... near-copies Thanks ...
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1answer
55 views

How to restruct RAID 10?

We would like to alter the partition without losing data. Here is the sketch of the plan. I am wondering if it is doable using mdadm; and if so, please kindly point some reference on how to carry out ...
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shrink ext4 partition on raid 10

My question is similar to Move ext4 partition, but the challenge I couldn't figure out is how to shrink a partition from the start. So suppose originally the partition (with raid) is like this. ...
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105 views

Automated installation of “ubuntu-12.04.1-server-amd64”

The physical server contains two HDD, and Raid1 mirror relation has been established between them as shown in attachment. In ks.cfg , the information related to partitioning as as follow: #Partition ...
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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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316 views

NAS running Ubuntu / Raid 5 / SSD cache

I'm about to setup a NAS - planned hardware so far: MB: ASUS P9D WS(*link1): sry, it's german, it says th MB supports Hot-Plug in AHCI or RAID Mode, supports Intel Smart Response (SSD Caching) CPU: ...
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517 views

RAID1 “conflicting device node” message on startup

I'm dual booting Win8.1 and Ubuntu 14.04 (Gnome Classic). I have RAID1 set up (on Asus Z87-A motherboard) with Win partition, Ubuntu partition, and NTFS partition for data. On Ubuntu startup, I see ...
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124 views

RAID6 will not reassemble with 2 failed disks

Relevant photo album Hello all. I have a file server running ubuntu 12.04 (See first picture) with 6x Seagate 3TB HDDs in a RAID 6 configuration (giving 12TB of storage). This is a software RAID, ...
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Ubuntu 14.04 Manual Hard Drive Partitioning Help Needed

I'm in need of some assistance with manual partitioning from the Ubuntu 14.04 install GUI. I'm trying to do a fresh install of Ubuntu 14.04 desktop. I have a 60GB SSD as that I want all my OS files ...
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1k views

GRUB install fails on software RAID

I've been trying to install Ubuntu 14.04 on two 30GB SSDs (OCZSSD2-1AGT30G) with an ASUS motherboard (ASUS DSBF-D). I tried installing on both of the drives separately and it seemed to work fine. The ...
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654 views

GPT talbe corrupt after RAID1 setup

So I'm completely new to Ubuntu and am trying to set up a backup/media server at home. I saw the guide on Lifehacker and figured I'd give it a try. My system is an i3 3225 on an Intel DH77DF mobo ...
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258 views

btrfs two Data sections and enospc error when trying to convert

I currently have a btrfs filesystem setup like this: # btrfs fi df /storage/ Data, RAID1: total=2.33TiB, used=2.32TiB Data, RAID0: total=2.00GiB, used=2.00GiB System, RAID1: total=32.00MiB, ...
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678 views

Is it possible to pause/abort mdadm reshape?

Saturday I added a new drive to my mdadm array, and the reshape process is taking a long time. Unfortunately there's a nasty storm coming, and I'm likely going to lose power, which will probably do ...
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32 views

Failure proof logical volumes on heterogenous bunch of irreliable hard disks

Like I guess most people do, I have accumulated an assortment of various hard drives over the years. They are mostly of different size, manufacturer, speed, etc. There are too many off them to put ...
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32 views

Upgrading and recovery options with software raid 1

I recently installed Xubuntu on a spare machine that is serving as a NAS, voice communication, and hosting various other services. I have a 120GB SSD containing the OS and 2 4TB drives configured as ...
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823 views

Can't mount RAID after upgrade

I just upgraded my box to 14.04 and on bootup I got a message, that my RAID devices can't be mounted automatically so I chose to skip it and work through it after boot time. Now booted up, A mount -a ...
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new 12.04.4 Raid0 faulty install; malformed gui & erratic mouse

UPDATE2: #irc says 12.04.4 alternate not supported and Quadro NVS 450 not well support. Trying V14.04 now (for RAID0 & hopefully better gpu drivers)... UPDATE: reinstalled. no swap partitions. ...
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407 views

Strange output of btrfs fi df after converting from RAID0 to RAID1

I just converted my 3 disk btrfs filesystem from RAID0 to RAID1 and balanced it. At first the data was all in the RAID0 filesystem, so running btrfs filesystem df showed something like this: (XX are ...
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742 views

Does Ubuntu 14.04 support SSD TRIM on Software RAID? [duplicate]

I'm using the softwareraid (mdraid) RAID1 on 2 Intel SSD DC S3500 and I found there's a fstrim job on cron.weekly. Does it mean Ubuntu supports it? I could not find any article saying that SSD mdraid ...
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235 views

Poor SSD RAID0 write performance, alignment on raid?

We have Samsung840Pro 512gb x2 connected to the motherboard's c600 6gbps SATA3.0 ports. The RAID partitions use 100% of each disk: user@blockparty ~ $ sudo fdisk -lu /dev/sdb Disk /dev/sdb: 512.1 ...
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566 views

One SSD and two HDD. Install on SSD and RAID 0/1 or LVM for HDDs?

I would like to install Ubuntu 14.04 on my PC, but I'm uncertain on what would be the best for my setup. I have a 128GB SSD (Crucial M4) and two 500GB HDDs. Currently I'm running Windows 8 where I ...
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Ubuntu 14.04 Trusty with UEFI + Software RAID1

How to install Ubuntu on UEFI BIOS with Software RAID1? Should there be 1 partition for EFI and another partition for RAID1 (root+swap) on each drive? I wonder how it will update one EFI partition ...
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83 views

Bootstrap mdadm RAID6 server via USB flash

On my Ubuntu Server 14.04 I have large mdadm RAID6 array, and tiny boot HDD. I want to get rid of that boot HDD, and boot system from USB flash drive. Although I know it is possible to install ...
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144 views

Cannot replace missing disk in raidz

My raidz is degraded after the change of my motherboard - a disk cannot be found. The missing disk used to be /dev/sdh but now it is named /dev/sdg - which is the cause of the problem. In the ...
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301 views

Installing and booting Lubuntu on ReadyNAS with Btrfs

I have NetGear ReadyNAS Business Pro with 6 Place for 6 Disks I did a hack the box (basically it is a normal PC with Intel CPU) I upgraded the CPU and I used the ReadyNAS OS 6 (which is Debian ...
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217 views

How to configure and run mdadm RAID with /boot and /boot/efi

I am finally getting around to setting up RAID on my existing Ubuntu 12.04 box. This is my first time with mdadm and I have read several tutorials and I believe I have the basics of the RAID part ...
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1k views

mdadm warning (system unbootable) from update-initramfs, mkconf's suggested fix seems inconsistent with mdadm's description of problem

Summary: update-initramfs says system unbootable, message points to mkconf which suggests rewrite to mdadm.conf that would appear to break the RAID, system up (for now) but next reboot may kill it, ...
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53 views

Investigating RAID-related issue that caused data loss while using LiveUSB

I recently tried to install Ubuntu on one of my hard drives and something went seriously wrong, resulting in 400+ GB of data being lost. Frustrated as I was, I've decided to try to find out what ...
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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: ...
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694 views

formatting and mounting a 32 TB RAID 50 disk

I want to know how to format a 32 TB drive. What program should I use and what filesystem? The largest drives I ever had to map before are 2-3 TB and I always used fdisk for formatting. But fdisk is ...
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368 views

Raid5 can't start degraded, dropping to shell

Already posted about this here: http://ubuntuforums.org/showthread.php?t=2219141 but thought I could post here as well, in hopes that it would increase my chances of a solution :) I've been running ...
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480 views

btrFS RAID5/6 Understanding space usage and usability

Im currently thinking about experimenting with btrfs with my workload in place of ext4. Right now I have a few drives on order. I want to setup btrfs on the first drive and slowly expand the FS ...
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27 views

Fresh install of 12.04, boot problem after updates

This desktop has a hardware raid, for which the BIOS settings is "legacy." Fresh install. Then, when I enter the following command: sudo apt-get update update happens. The computer runs fine. ...
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735 views

HP ProLiant ML350e Gen8 - Ubuntu 14.04 LTS

I was researching about new Ubuntu Server 14.04 LTS and the Proliant ML350e Gen8 with B120i RAID controller. I found that HP certified Ubuntu without RAID engine on 12.04 server version, but now I ...
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246 views

Install Ubuntu 14.04 Only /dev/sda Showing

I'm using the live CD to try and install Ubuntu 14.04 on my old desktop. The two disks were previously part of a RAID array (of 3 disks, RAID , 1 degraded and couldn't be bothered rebuilding for an ...
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Grub2: Disk not found trying to boot LVM partition on raid1 set

I'm having difficulty booting from an LVM logical volume which is stored on a raid-1 physical volume. Using Ubuntu 13.10 and Grub2 2.00. The setup is that /boot/grub is on a physical raid-1 set. ...
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119 views

Samsung 840pro SSD in RAID0… caveats?

We have a SuperMicro X9SRI-F-O board that has two 6gb/s SATA3.0 ports. We currently have a single Samsung 840pro SSD hooked up to the first SATA channel. We want to double the storage and bandwidth by ...
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3answers
7k views

Problem installing 14.04 in VMPlayer

I'm just trying to install Ubuntu 14.04 in VMWare Player. It has a single huge (300 GB) partition and so I expect it to take some time, but after a few minutes, this message came I'm unsure what ...
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8k views

Install Ubuntu Desktop on Software RAID 1 (mirror) with encryption

I used to use Ubuntu 12.04 Alternate installer to setup my old RAID1 + encryption system. With the new LTS 14.04 (beta 2) I found the alternate installer missing which complicates installation on a ...
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85 views

How do I get GRUB to install on a RAID array? [duplicate]

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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26 views

Mdadm Raid 5 and PCI-E Controller

so I've been searching and haven't found the exact answer i was looking for. Basically I current got a 6 hdd raid 5 array and i'm looking to expand it to 8. but almost all options involve another ...
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261 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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setting up ubuntu server 12.04 with SSD/HDDs questions

I am setting up Ubuntu server 12.04 LTS. I am using 120GB SSD for OS and 3x4TB in RAID 5 (software RAID 5) Here are my partitions that I configured during the initial installation: /, /boot, swap on ...
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125 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 ...
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224 views

Install the grub boot loader on hard disk fails

I have the following disk setup, raid5: Disk /dev/sda: 111.8 GiB, 120034123776 bytes, 234441648 sectors Disk /dev/sdb: 111.8 GiB, 120034123776 bytes, 234441648 sectors Disk /dev/sdc: 111.8 GiB, ...
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623 views

How to mount Intel Matrix RAID 0 on Ubuntu 13.10 live?

I'm not a heavy Ubuntu user. I have a Sony Vaio Z series laptop with two 64GB SSD disk working in RAID 0 (Intel Matrix - Intel Rapid Storage Technology) under windows 7. The quest is to mount this ...
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150 views

ubuntu doesn't recognize lsi megaraid 9240 (Asus Rog motherboard)

I have an LSI Megaraid 9240 4i raid controller. When I put it in my computer I can configure it for raid1, the bios recognizes it, but the Ubuntu installer hangs with "no media found". I use a flash ...
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401 views

Ubuntu 13.10 unable to detect windows 7 installed partition

I know this is being asked again and again, but it seems like there is no way out. I'm really losing it now! So here it goes: I built this below average rig yesterday : core i3 4130 3.4Ghz [64bit] ...
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Why isn't md raid assembled after reboot?

I'm trying to get an Intel RAID setup. The problem I have is that after a reboot the raid is not available. These are the steps I go through to setup the Intel RAID using the mdadm command. I've ...