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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Security of JBOD vs RAID while there is no backup

I have some large amount of data (~40 TB) consisting of small files. The data is currently stored on JBOD. Because the data is not super important and I cannot afford the needed disks there is no ...
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Install Linux on SSD and have HDD RAID5

I'm trying to find a solution, but it seems that no one has specifically had my problem. I'm trying to install Linux on an SSD and attach a RAID5 setup so that I have a secure home networked server. ...
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Installing Ubuntu Server on Raid 1: FakeRAID

I am installing Ubuntu Server 14.04.2 - amd64 in RAID 1 on my system with the following specs. SPECIFICATIONS: ASUS H97M-E 4GB 1600MHz RAM i3-4160 2 x 3TB Toshiba However, I failed ...
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How to backup the full system at runtime once a day

I would like to backup my 'server' running Ubuntu 14.04 every day at around 04:00. It needs to suspend after the backup has completed (I've got my script for this, but the software needs to have a ...
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30 views

Kubuntu 16.04 <-> 15.10 Inconsistent and slow wirless network transfer speeds

I have a file server running Kubuntu 15.10 and a client running 16.04. In truth, this issue existed prior to the 16.04 upgrade. When moving files, say a 500MB folder of MP3s, the transfer rate gets ...
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23 views

hard disk not mounting

it shows error like Error mounting /dev/sdb1 at /media/mrityunjay/LENOVO_USB_HDD: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sdb1" ...
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21 views

grub2 can't configure after failed upgrade on raid

I tried to upgrade ubuntu with standard apt-get upgrade and ran into similar problems to what is described here: https://www.webhostingtalk.com/showthread.php?t=1315016 grub went through a ...
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Power Failure on Software RAID 10: is automatic resync enough?

I had a power failure on a server (Ubuntu 12.04.3 LTS ) with a raid 10 array. When I restored the power, in dmesg there was the message: md/raid1:md1: not clean -- starting background reconstruction ...
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How to upgrade drives in mdadm RAID?

Server that runs mdadm RAID1 2x 1TB HDD needs to be upgraded to 2x 4TB. After I want to configure mdadm monitor to send me e-mail if anything happens to RAID. What is the safest way to do this and ...
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29 views

SATA ata2 Errors - ata2.01: failed to IDENTIFY (I/O error, err_mask=0x4) [closed]

I am getting below errors in my server with software raid 1. ata2.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen ata2.01: cmd ea/00:00:00:00:00/00:00:00:00:00/b0 tag 0 res ...
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Failed to load COM32 file menu.c32 - existing install

I've been trying to get one of our servers online since Friday. This server became unresponsive Friday and after running diagnostics on it (DL380 G9), I found nothing wrong with it. This server was ...
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1answer
24 views

md, mix disks and partitions in an array

My question is really how to mix in a 4 TB disk in my array consisting of 3 TB disks, which was partially answered here: Can I create a hybrid software-RAID array with disks of different sizes? ...
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145 views

How to Install Ubuntu 16.04 with RAID by default?

I have many HDDs which I would like use for making RAID. The installation process does not ask about it. There has been a sequence of data lost now in my systems because of various hardware/software ...
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56 views

unable to mkfs.btrfs ERROR: unable to open /dev/sdc: Device or resource busy

I have an old Dell PowerEdge 1950 with a LSA SAS card connecting three hard drives. I am running Ubuntu 16.04 server. When I run the following command: sudo mkfs.btrfs -d raid6 -f /dev/sdc /dev/sdd ...
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Unable to add raid drives to Asus z97 machine

I have a Asus z97-a Motherboard and I just installed 2 HGST 4 Terabyte drives. Awesome right? Except that I cant seem to get the on board ASUS Raid to work? "Control I" will get me into the Bios and ...
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71 views

Does an HP Proliant DL360 G9 is supported by Ubuntu (Any version)? [closed]

I would like to know if Ubuntu can be installed on a new server HP with this characteristics: HP Part number: 755262-B21 Specifications: HP ProLiant DL360p Gen9, Intel® Xeon® E5-2630v3 ...
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20 views

Error unknown command hwmatch

I'm getting "unknown command hwmatch" message on each boot after I installed Ubuntu 16.04 following this steps: https://gist.github.com/umpirsky/6ee1f870e759815333c8 in order to setup RAID0. Special ...
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55 views

[Solved]Passwords not recognized after install of Ubuntu server 16.04 x64 [duplicate]

It is a bit ridiculous. I just installed Ubuntu server 16.04, the install was fine, I entered a user password and root password. But right AFTER reboot I can't login. Not as user, not as root. Okay ...
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1answer
77 views

Cannot edit /etc/initramfs-tools/conf.d/mdadm and /etc/udev/rules.d/RULE on 16.04 Server

I have just installed Ubuntu server 16.04 LTS with a RAID 1 configuration. I want to edit the mdadm file so I could work on the machine while the raid mode is degraded. The problem is, that there is ...
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16 views

Migrating W7 file server to ubuntu server 14.04

About 3 years ago a built a file server with a LSI MegaRAID 9280-24i4e hardware raid controller along with AMD Phenom II x4 cpu, 8GB of RAM and the OS that I chose was W7 and is installed on separate ...
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Disk has disapeared, Raid 1 appears to have changed disks :( and emergency mode!

What a muddle....I had managed to set up a Ubuntu 16 server utilising a software RAID 1=(sda & sdb) Had added a second disc mounted to /media/BackupDrive sdc. all with samba, all was well :) ...
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35 views

mdadm monitoring script after boot

the mdadm monitoring program is not working after boot. When i kill the process afterwards and run mdadm --monitor --scan again, everything is ok and the script runs on failures. Here ist my ...
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144 views

Unable to Partition Software RAID 0 array with 16.04 Server + Z170 Skylake, ACPI Exception in log

I'm trying to do a clean install of 16.04 on some new hardware, and I'm unable to partition/install onto a RAID 0 array. Motherboard: AsRock Z170 Fatal1ty ITX/ac (SATA devices set to AHCI, also tried ...
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36 views

Filesystem/RAID configuration to stripe/mirror three hard drives

I have 3 HDDs in my workstation: 1.5 TB (drive "A") 2TB (drive "B") 4TB (drive "C") I am doing a fresh install of 16.04. I would like to find a filesystem/RAID configuration that allows me to ...
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10 views

Adding disk and converting RAID 0 to 5

I used MDADM to create a 4-disk RAID 0. I have another disk I want to add and convert the array to RAID 5. I'm already aware of the risks of RAID 5 but it is my best option at this time. How would I ...
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1answer
65 views

Raid 5 array built with incorrect partition size (Ubuntu Server 14.04)

First of all, I am an absolute beginner with Ubuntu Server. I decided to build my own server and running it with 4x 3TB drives in a software RAID mounted as /home and an SSD with the OS on it. When I ...
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9 views

DMRaid Not Detecting its disks

We had a software raid using dmraid in an ubuntu 14.04 box. For some reason, we changed the sata ports per disk. The disks were removed and added again to the case but on different sata ports ...
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220 views

RAID 0 installation instructions

I am looking for specific instructions for installing Ubuntu (clean install) on 2 identical hard drives in a RAID 0 configuration (striped). Have never found anything that describes how to do ...
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21 views

Drive Encryption Ubuntu Server 15.10 [closed]

I have a small server running Ubuntu Server 15.10 from a usb stick. I have 6 drives of varying size all formatted to ext4. 2 drives I plan to configure using Raid 1. The remaining 4 drives I plan to ...
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52 views

Kernel panic not syncing timeout synchronizing machine check over cpus

We installed an Ubuntu Server 14.04.4 LTS to one of our customer's server. Server has large storage drives and software RAIDed SSD disks for OS. Server is crashing randomly. And we are getting error ...
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114 views

What is 'AHCI mode' - HP ProLiant MicroServer Gen8

I have just purchased this server and I would like to install Ubuntu Server on it. I would like to keep RAID support, although I'm currently only using one HDD which will have my files and OS on it. ...
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1answer
28 views

Pointers / advice on Ubuntu Server install on HP Gen 8 G1610T microserver

I've recently purchased an HPE Microserver G8 GP1610T, 120GB SSD drive and a couple of 2TB drives to build an Ubuntu based server with the OS on the SSD drive and two 2TB drives as mirrored (RAID1) ...
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32 views

kworker using all my IOs, Postgres slow

I have 2 SSDs set up in RAID 0 configuration with a single volume on them that I've been using without problems for 3 months straight to run a PostgreSQL database. Suddenly, today, the DB got really ...
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14 views

Server 14.04 Install Onto Software RAID1 Fails to Boot

New 14.04 server install onto host with 2 x 1 Tb drives, followed https://help.ubuntu.com/lts/serverguide/advanced-installation.html to setup a software RAID 1, end of install reboot and I get no ...
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21 views

ZFS zpool import in ubuntu taking very long after system crash and reinstall OS

Don't know if the events were related in any way: zpool set to automatically run scrub on crontab, most recent scrub completed a few days ago, 3 unrepairable errors on 3 files. I did not require ...
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31 views

Raid 0 drives are not detected during Ubuntu 15.10 installation on GT72S 6QE dominator pro G

I have GT72S dominator pro G, with 128+128 Gb RAID 0 configured SSDs. I have 1TB mechanical disc as well. Windows 10 on UEFI mode is already installed. Trying to dual boot ubuntu and w10. The problem ...
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How do I add a partition (specifically swap) to my raid0 laptop setup?

EDIT: yes, gparted was the (in hindsight obvious) answer I foolishly didn't create swap space when I installed Ubuntu alongside Windows on my Acer laptop with 2 SSDs preconfigured as raid0. Now I ...
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39 views

Help, cannot install Grub

I have a recent motherboard (GA-X79-UP4), and a couple of 3TB Seagate drives. Trying to install Ubuntu 15.10, in a RAID5 configuration. Using the server image, since the desktop one does not seem to ...
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22 views

Creating boot partitions on multiple disks

I'm trying to get some redundancy with RAID1 on my Ubuntu Server box. I've made some good progress using the install wizard but I'm stuck on the following: >> lsblk NAME ...
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What does this fstab configuration line mean?

I am trying to mount a RAID array on my computer, and I found a guide on the Internet that told me to add this file to /etc/fstab: /dev/md0 /mnt/raid/ext4 defaults 0 0 What does /dev/md0 and 0 0 ...
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21 views

Procedure for rebooting server with Soft RAID mdadm

I've just made a raid10 on my ubuntu 14.04 server, and i was wondering if there was any step too do if i would to shutdown/reboot my server. It a Software RAID with mdadm. Do i need to make a script ...
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31 views

Installing Steam games on a RAID 0 array

So I just put a few old drives in a RAID 0 using mdadm and it was originally just for STeam games, but when I hit install, I don't know how to make it download onto my RAID 0 array... So is there a ...
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63 views

mdadm raid 1 to raid 0 (or lvm…)

I currently have a machine with 2x3TB in software raid 1 (mdadm, Ubuntu 15.04). I would prefer to keep the data on the disks, but I can risk losing it. Are there any options to migrate without ...
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14 views

Convert software RAID fileserver from Windows to Ubuntu

I currently have a fileserver running on Windows 7 (it started as an old backup machine but has grown). It has 1 SSD for the OS, and 6 1TB HDDs, in 3 RAID 1 pairs. This was done via Windows' disk ...
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36 views

How do I recover my RAID 1 file system after formatting it?

I used mkfs.exfat /dev/md0p1 by mistake, and killed my RAID 1 instead of formatting a micro SD card. Very dumb, I know. How can I undo this colossal mistake? I'm reasonably confident that the two hard ...
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24 views

Ubuntu won't boot after install on software raid r

I have installed server v15.10 and created a software raid 5 array. After partitioning and setting the EFI system partition as bootable it does the install with no problems. When done it reboots and ...
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Is my mdadm command correct, should I check something else before entering it?

The question: Would someone please confirm that I have investigated the correct factors and am about to use the correct mdadm command before I do something that might damage the data in my ...
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58 views

Trying to mount old NAS hard drive - mount: Structure needs cleaning

I had a Western digital. The software was not working anymore, so I remove the hard drive. The HD is a Western Digital Caviar Green of 1 To I connect through a USB hard drive converter and..... ...
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23 views

MDADM Existing RAID

I just swapped from Fedora 20 over to Ubuntu 14.04 LTS. I have a pair of drives that were setup using RAID 1 (mdadm) and working beautifully. The OS is on a third drive (SSD). The web is awash in ...
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22 views

Extend primary partition [duplicate]

In planning for the future, I've been trying to extend the total size of our primary partition running Ubuntu Server 14.04 (from 6TB to 15TB). It was setup as a virtual disk (PERC H730 RAID ...