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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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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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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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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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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63 views

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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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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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 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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224 views

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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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 ...
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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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204 views

How do I install Ubuntu 14 with UEFI and software raid0 on GPT SDDs

I usually work on a Mac and would like to setup a Linux workstation for Development. I have no experience installing Linux, because the servers I work with are hosted VMs. Most of the Ubuntu specific ...
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67 views

Partitioning Unallocated LVM Space as New Physical Partition with Hardware RAID

I'm a newbie to linux and partitioning and apologies in advance if this has been answered before; I've searched extensively on the web for answer, and after being unsuccessful I decided to post a ...
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28 views

Shouldn't have left SATA port empty when creating RAID?

I recently added an md RAID5 to one of my computers. The boot & root filesystems were on the motherboard's SATA port 1, which became /dev/sda. I left port 2 empty for future use (oops?!) and ...
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Ubuntu Server 14.04 TLS plus Hardware RAID

I have just completed hadrware installation of my new RAID server which will run with Ubuntu Server OS. I have installed Ubuntu Server OS and everything run seemingly without problems. However, I ...
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129 views

Unable to install ubuntu alongside windows 8.1 with raid0: no partitions detected

I tried installing Ubuntu 14.04 alongside windows 8.1 on my machine using an Ununtu USB drive in UEFI mode, but no luck: My machine is Asus UX301, preinstalled with Windows 8, upgraded to 8.1. Got ...
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Hide partitions on RAID0 in GRUB2

I'm trying to hide two Windows versions from each other. I know how to do this on a single drive, however, it seems to be somewhat more difficult on a RAID0. More precisely, I don't know how to ...
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Getting '??? ???' when trying to install Ubuntu

I am trying to install Ubuntu on my older laptop and whenever I get to the format your hard drive part it pops up with the message ??? ???. I am pretty sure it is to do with how my partitions were set ...
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How To Mount RAID0 on Ubuntu (to recover data from Acer Aspire S5 Ultrabook)

Recently I ran into booting issues with windows 7 on my Acer Aspire S5 ultrabook. Before bootup, the system indicated that one of the physical disks (the ultrabook has two 128 GB SSDs in preinstalled ...
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UBUNTU Server Installer Does not Recognize the Hard Drives On A RAID-Based Server

My Usual Workflow: Usually I get/build a server, add the hard drives into it, then I install UBUNTU-Server through a bootable USB. Current Problem: I do have a set of servers, that have RAID ...
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Boot failure - /dev/mapper does not exist

I had a previously bootable version of Ubuntu, however now when I try to boot I see the error message ALERT! /dev/mapper/isw_bdacadajjgh_ARRAY0p5 does not exist. Dropping to a shell This is a work ...
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Unable to mount the FreeAgent GoFlex device

$ mount /root/Desktop/image.dd /root/mnt/recover -t ntfs Failed to read last sector (625137344): Invalid argument HINTS: Either the volume is a RAID/LDM but it wasn't setup yet, or it was not setup ...
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mount ssd disk on new acquired server

I have just acquired a new 3x 120Go SSD server (within soyoustart Soft Raid), but I can only see/use one SSD disk! Should I mount the other 2 disks ? What should be the new content of fstab file ? ...
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Crashed Ubuntu 12.04 Server -> Need Help Recovering & Transitioning To New Server

I have been running an Ubuntu 12.04 server with a single 2 TB hard drive in a somewhat-older small form-factor (SFF) PC for a while now. I had a headless CrashPlan client installed on it to back up ...
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Ubuntu 14.10 does trim SSD RAID 0 discs?

I've got Ubuntu 14.10 in a RAID 0 set up with 2 x Samsung Evo 840 SSD 256Mb, for performance reasons while acessing/modificating very large files. I've also got a schedule backup to another HDD for ...
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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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123 views

Software RAID and Ubuntu 14.04.2

I recently changed my Plex server from the headless Ubuntu Server 14.04.1 to Debian 7.8, during which stability issues sprouted up with my software RAID which I thought were tied to Debian. I ...
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Can't run commands on server, Ubuntu 14.04

I'm pretty new at this, so it's likely that the problem is user error... Basically, I can SSH into the server and navigate around, but when I try to: sudo apt-get update I get a message: ...
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150 views

Problem mounting raid 0 NTFS drives in Ubuntu server 14.04

I have 2 disks, sda and sdc with the following gdisk output: $ sudo gdisk -l /dev/sda GPT fdisk (gdisk) version 0.8.8 Partition table scan: MBR: protective BSD: not present APM: not present ...
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Booting Ubuntu 14.10 alongside Windows 8 stops working on installation of nvidia drivers

So I've built my own PC, and I'm trying to install Windows 8.1 and Ubuntu 14.10 alongside each other onto a 3 disk RAID5 array. The PC also has a fairly beefy video card (a Gigabyte Nvidia GeForce ...
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Ubuntu 14.04 Installation on acer altos G520

I got an old server and I'm trying to install Ubuntu from USB. Everything is fine till I selected Ubuntu Live or Ubuntu installation. The Display starts to switch between differnt resulution modes. ...
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mhddfs not working as expected

when I run df -h I get: Filesystem Size Used Avail Use% Mounted on /dev/sda2 74G 3.0G 67G 5% / none 4.0K 0 4.0K ...
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Server 14.04: fdisk sees disks, but GUI doesn't

I've got six drives that I'm looking to set up in a RAID10 configuration. 2x 2TB, 2x 1TB, 2x 500GB. The motherboard in this server (pretty old) supports hardware RAID10, but only with 4 disks, so I ...
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How do I use the RAID array in 12.04 LTS

extreme tenderfoot here. Have installed 12.04 LTS on SSD 64 Gb have 4x80 Gb HDD's. Would like to boot from SSD and use the RAID for well large files, low to moderate games, and occasional ...
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How to start RAID array?

a few months ago two volumes in my Synology DiskStation 412+ NAS crashed and until now I am still unable to recover the data but I am motivated and won't give up. I am able to see the hard drives ...
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Software RAID with FakeRAID already enabled Ubuntu 14.10

Somewhat new to the Linux world, so I apologize if this seems a bit foggy: I dumped a bunch of drives into an old case with the goal of making a Ubuntu NAS. I enabled the on-board RAID option on my ...
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Installing Linux with RAID 1 for first time ever

I want to install Ubuntu 14.10 Server 32 bit on a system, with specifications: Intel motherboard(DG965WH),Two SATA hard-drives and I want to install Linux Server for the fist time ever.without dual ...
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Grub halts on menu until enter is pressed

I have installed an Ubuntu server and it stops on the Grub Menu until ENTER is pressed without timing out and using the default entry. At first I thought that the problem was due to a reboot after a ...
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Ubuntu Server Raid 0 Install Question

I have installed Ubuntu -1410-utopic-64-minimal on my server. I have 2 3 TB HDDs. I installed in raid 0. This was my first time setti8ng up a raid. I don't know if I did it right. This is what shows ...
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why does mounting a volume on a building raid cause sync speed to drop?

I have an array with 4 disks in RAID 10 configuration : root@backup:~# mdadm --detail /dev/md127 /dev/md127: Version : 1.2 Creation Time : Mon Feb 23 16:01:29 2015 Raid Level : raid10 ...
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12TB storage, can someone help me? :)

I have thought about making a RAID 5 with 4 hard drives, 4TB each. There are files with few KB and other files with some GB. I want it to be as stable as possible. This will not be mounted as / or ...
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How should I encrypt Ubuntu Server 14.04 with AES on RAID 10 and RAID 5?

After researching I've come to the conclusion that my set up is just not standard enough to have a direct answer floating about on the interwebs. My Hardware: i7 950 CPU 24 GB DDR3 7 2TB 7200 RPM ...
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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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Backing up or mirroring my existing hard drive

I'll try to keep it short - I have windows 7 and ubuntu 14.04 LTS installed. Windows has recently stopped working (involving all kinds of messages during start up that say that my hard drive is ...
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Raid Drive Won't Assemble

I had a server with Raid 5, and I wanted to wipe everything and do Raid 10. I deleted the raid 5 as best I could, zeroing superblocks, removing it from fstab, etc. And I created the raid 10. Now, I ...
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How to setup a RAID 1 array in 14.10?

I need to know how to set up my 2 1TB WD Red hard drives in a RAID 1 array. I've tried following a tutorial on this, but it was a very old tutorial. Please help me with a detailed response.
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Adaptec 8805 kernel panic on Ubuntu 14.04.1 64bit

I use QUADStor with Adaptec 8805 and constantly falls into a kernel panic by reason of AAC (adaptec) Current driver version: 1.2-0 (30200) Clean installed system with quadstor ... same errors ...
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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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How do I only install ubuntu 12.04 in hp z400 workstation?

I am trying to install ubuntu 12.04 in hp z400 workstation which has windows installed before. When I tried to install ubuntu, I got this error: “Unable to install GRUB in /dev/sda”. When I chose ...