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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Remove disk from mdadm array, Raid 0

I have a 2 disk mdadm RAID 0 volume, 4TB total, created in Ubuntu 14.04 server. The volume is less than half full and I'm looking to unraid the disks, keeping the data so that I can use one of the ...
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Ubuntu 12.04 and Hardware RAID 5 and LVM

I have an existing database server setup with RAID5 (3pcs 1 TB disk - usable is 2TB). One of its partition is /data is LVM. There is production data already in there so we opted to create another ...
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6 views

How to check ZFS Zpool is set up correctly?

I have just created a RAIDZ1 group of 3 x 2TB disks acc@CODAAMOK304:~$ sudo zpool status pool: storage state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM ...
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Boot message conflicting device mode

HI I'm running ubuntu server 14.1. There is a nvidia fakeraid array active. The raid is working, however on boot I see these messages (1 of 3 messages): Systemd-udevd[599]: conflicting device node ...
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How can I use Kernel 3.19 in 14.04 now?

So I'm rebuilding my storage server. For stability, I want to use Ubuntu server 14.04 LTS as the OS. However, I'm planning to use Btrfs with RAID 5, and this has been greatly improved in kernel 3.19. ...
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Installing issues | unable to open /dev/sda and /dev/sdb

I am installing Ubuntu 14.04 from a USB drive. It boots into the installation and after selecting Install Ubuntu the loading screen appears and stops there. Pressing the left arrow key brings me to a ...
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24 views

Landing in the GRUB command line at start up (bcs of XFS filesystem at /boot!)

Edit. The problem that I landed directly in the GRUB command line was another bug than originally asked for - see the answer. I changed the title accordingly. I think the title says it all. I'll ...
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22 views

Resize ext4 Partition to >2TB without data loss

Is it possible to resize an ext4 partition to >2TB without data loss? I added 1TB disk from a RAID 5 Hardware RAID (from 2TB usable to 3TB usable) fdisk command output: Disk /dev/sdb: 3000.5 GB, ...
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How to install Ubuntu server with UEFI and RAID1 + LVM

I used to install my servers with LVM over software RAID1, and grub install on the MBR of both drives. Now I have an UEFI server, and the compatibility (BIOS) mode does not seem to work. So I went ...
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Can the C: drive in WINE be put in the RAID 10 local to host Ububtu 12.04 LTS

really new to Ubuntu, and even newer to WINE. Is it possible to move the C: drive in WINE to use a Raid 10 array that is internal local to host non boot storage. I really want to keep the SSD boot ...
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Settings up RAID 1 on existing Ubuntu installation

Good morning, For my internship project I am currently setting up a Linux (Ubuntu 14.04.2 LTS) web environment (NGINX/PHP5/PHP-FPM/MariaDB and such...). Now I forgot to set up the RAID 1 ...
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34 views

Rebuilding a RAID 1 array on a production server (Ubuntu 12.04.2 LTS)

I manage a production server which has a RAID 1 array with two identical hard drives. Apologies in advance, I've read many threads on this but due to the critical nature of the server, it will save ...
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23 views

Files take up more space on new RAID array

I just upgraded and reinstalled my home server. One thing I did was going from software raid to a raid card. After doing this and starting to copy back my backups, I've noticed that my first ~1TB ...
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10 views

mdadm build legacy array on boot

I have RAID0 that was built using windows dynamic disk. I've read that this is a legacy array and can be assembled using build in mdadm. I've gotten the array to build and mount using the following ...
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2answers
5k views

Driver hp raid controller b120i

I have a problem with a installation of ubuntu 12.04 server on HP SL4540 with raid controller b120i. Ubuntu during installation does not recognize the raid controller, and displays the disk ...
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21 views

Ubuntu 12.04.3 - Expanding/Resizing and ext4 partition upon additional Disk in a Hardware RAID 5 [duplicate]

We have a web server configured as hardware RAID 5 with 3pcs 1TB Disk. Usable is 2TB and partition as follows: /var/www/html is ext4 Filesystem Size Used Avail Use% Mounted on /dev/sda1 ...
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16 views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
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Cannot Install Over Centos 7

I am trying to install Ubuntu 15.04 to replace my existing distro of Linux, Centos 7 Workstation. During the install I get to the point where it asks if I want Ubuntu to overwrite my existing disk ...
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RAID1 /dev/md0 showing up as /dev/md126 after reboot

I've already configured the file: /etc/mdadm/mdadm.conf with the outcome of : mdadm --detail --scan ARRAY /dev/md0 metadata=1.2 name=compute2:0 UUID=4e0dd53b:c29a881a:795286f7:a649ff4a ARRAY ...
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36 views

Ubuntu 12.04.3 - Expanding/Resizing LVM partition upon additional Disk in a Hardware RAID 5

We have a database server configured as hardware RAID 5 with 3pcs 1TB Disk. Usable is 2TB and partition as follows: /data is LVM Filesystem Size Used Avail Use% Mounted on /dev/sda1 ...
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34 views

Slow raid5 resync with WD Green drives [closed]

The Question Why is my initial resync so slow? Initially cat /proc/mdstat reported ~ 30000K/sec. I then increased /sys/block/md0/md/stripe_cache_size from 256 to 16384. That increased the speed to ...
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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 ...
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Identify failed drive from RAID 5 NAS

I have a NAS with 4 drives setup in RAID 5. It recently started making a lot of noise (not good) but I couldn't figure out how to get the NAS system (iomega storcentre) to tell me which drive was ...
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ZFS with existing data on 1 HDD

I'm thinking about adding a ZFS Raid-5 to my Ubuntu Server (Home use only). Currently, I have 2 HDD, 1 is 120GB for OS and the other is 4TB for download and torrent. I will purchase an addition HDD ...
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22 views

Mount RAID 1 disk in Ubuntu 14.04

I have a dead WD My Book Live Duo case but the 2 HDDs inside are still ok. These drives are configured as RAID 1. I contacted WD's technical support and they told me to use Linux to access the files. ...
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Help! One of my raid partitions has disappeared

First time posting but I can't solve this by my self, so pleas help me. I have a problem, I can't access one of my partitions. I have three 2 TB disks that are running "hardware/intel software ...
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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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10 views

RAID 1 disk from old server not recognized when taken off to a new machine

I had an old Ubuntu server at home, with two 1TB HDD in RAID1 configuration. I stored a lot of my works and stuff there, then eventually stopped using the server and let it get the dust for some time. ...
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Ubuntu 13.10 software raid

I had already Ubuntu OS installed on my desktop PC, where the software RAID 5 is configured ( 3 partitions /, swap and home ). This system was upgraded from the 11.04 till 13.04, it was quite messy, ...
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How do I know what physical drives/partitions are behind my /dev/mapper/isw_dghbbcaabe_RAID_Volume11?

This is a just upgraded Ubuntu 10.04.1 LTS machine. The /dev/mapper/isw_dghbbcaabe_RAID_Volume11 is "new" to the upgrade but I don´t know what physical drives/partitions are included in the "device". ...
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57 views

How to fix unbootable server after upgrade to 14.04

I had a pretty vanilla install of 12.04 running on a headless server with a software RAID1 array. I ran do-release-upgrade to upgrade to 14.04, and it seemed to run without issue. The only mistake I ...
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Ubuntu OS on SSD and RAID 1 for data files

I have an ubuntu server OS installed on 80GB SSD HDD. I also have 2 1TB HDD used for data storage.Both were used as RAID 1 before. Now as my OS got corrupted I reinstalled with Ubuntu server 14.04. I ...
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XFS File System Fails - Can't read Superblock

After this (Iomega Home Media disk corruption - data recovery help asked) problem solved... i have a new one.. I'm trying to understand why my Iomega Home Media Stopped working, and need for that to ...
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Rebuild a vaporized dmraid array using mdadm

Executive Summary While upgrading from Utopic to Vivid, my system removed dmraid, which I was using as the RAID controller for the array that I booted from. How can I rebuild the array using mdadm ...
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Is it possible to use a dedicated parity drive without striping?

I'm setting up a log server. I'd like to set them up so that each disk is independent of the next, but the last disk is parity of all the rest. The reason why I want this is because: You can't ...
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4k views

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 ...
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Anyone else having trouble accessing dynamic windows partitions from Ubuntu?

So, I have been trying to access my striped (software raid disk from Ubuntu) for at least six months. Now I know there are guides out there, but they are a bit hard to follow, at least for me. So I ...
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btrfs performance parallel access

I'm running a Raid5 (3x 500GB Sata2 HDD) based on btrfs 3.12 (Ubuntu 14.04 x64) and a VirutalBox VM uses this volume. As long as no other process accesses the volume, the VM runs fine. But recently I ...
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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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217 views

SSD is not showing up in boot loader installation device list while installing ubuntu 14.04 alongside windows

I've windows 7 installed in my SSD and trying to install ubuntu 14.04 in same SSD drive. But when I try to install ubuntu alongside windows it shows only HDD in the drive selection list. If I try to ...
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2answers
448 views

mdadm raid1 boot error

I created a RAID with Intel-Rapid-Storage(RST) - containing 2 3TB HDDs. Then I installed Ubuntu Server 14.04.1 64Bit. Everything worked fine and then I did a reboot. Then I got the following error ...
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Upgrade 12.04->14.04 broke mdadm RAID10. Boot stops

Server was an Ubuntu 12.04 x64 and was running just fine. All four drives in server are SATA spin-drives. /dev/md0 - swap RAID10: sda1, sdb1, sdc1, sdd1 /dev/md1 - root RAID10: sda2, sdb2, sdc2, sdd2 ...
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953 views

MDADM RAID1 Home Server System disk error: incrementally starting raid arrays mdadm: Create user root not found

I'm not sure what else to check. Everything below looks sane to me but the system hangs on boot. This is a home server with four disks crammed into a Dell OP620. Each pair of disks are assembled as ...
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How to install Hardware RAID Controller in Ubuntu Server

I am setting up an Ubuntu Server and I have a RAID drive with 5 disks with a VIA V-Raid controller, but I cannot configure the RAID drive as Ubuntu does not see it. What should I do? I need the RAID ...
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25 views

Installing Ubuntu On a Seperate HDD

I was wondering if I could install ubuntu on a 500GB HDD while there are already 2 other HDDs in RAID 0 with windows 8 installed. Any help is appreciated.
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How to Install Ubuntu 14.04 with RAID 1 using desktop installer?

Many people claim that it is impossible to install Ubuntu onto RAID 1 with the Desktop CD. Is this really true? If not, how can it be done?
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Cannot install Ubuntu - stuck at 'Installation Type'

I am trying to install Ubuntu on my computer, but am stuck at choosing the device and partition to install to. I have three harddrives, one of them was going to be dedicated to Ubuntu, but two of the ...
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2answers
880 views

Installing Ubuntu Server 14.04 on a pre-built RAID Array

So I've got a RAID array built (Via the ASUS motherboard, 2 disks, RAID 1). When I try to install Ubuntu server on it, the process runs as normal (Apart from the drive is detected as md126p1 rather ...
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RAID not assembling after reboot, throws “uuid not in config file” even though it is

I created a RAID5 array using 4 x 2.0Tb drives using the disks GUI. I used mdadm --detail --scan >> /etc/mdadm/mdadm.conf to save the configuration. I opened the mdadm.conf file and double ...
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Software RAID 1 is only showing half its expected capacity

While installing Ubuntu 14.10 I manually partitioned and set up software RAID 1. I have 4 HDDs, each 2 TB. On each drive I set 8 GB of swap space and made the rest ext4 and bootable (both as software ...