a utility to administrate Linux Software RAID devices

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MDADM issue with 14.04LTS after deleting RAID10

I am currently running 14.04 LTS on 1 HDD with a RAID 10 array used for storage. After a drive scare I decided to back up my array to an external HDD (done) create a new RAID1 array for the OS that I ...
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39 views

How to enable degraded RAID1 boot in 16.04LTS?

In previous ubuntu versions, adding BOOT_DEGRADED=true to /etc/initramfs-tools/conf.d/mdadm allowed the system to automatically boot when the root filesystem is on a degraded array. This no longer ...
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30 views

How do you install Ubuntu on an Intel RST Raid?

I am attempting to install Ubuntu 16.04 to dual boot with Windows 10 on my new PC. I am using an MSI Z170A motherboard and two 512GB M.2 drives. My goal is to RAID0 both drives, and split the single ...
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7 views

prevent hardisk with mdadm to mount on windows 10

I want to use windows 10 and ubuntu on my PC. I have a mdadm raid 1 storage in my ubuntu installation. If i install windows 10, will the hardisk with mdadm mounted on windows ? can i prevent that ?
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1answer
30 views

Lubuntu 14.04LTS fails to boot after updates - GRUB issue

I have been running Lubuntu 14.04 LTS for more than a year without (significant) issues. I postponed rebooting after a few updates recently (probably about 2-3 weeks) and when I finally had the time ...
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17 views

Downgrade package like mdadm after do-release-upgrade possible?

I'd like to downgrade mdadm after the do-release-upgrade from 14.04 to 15.04 and immediately to 16.04, because my RAID1 doesn't behave as wanted, the package maintainer seems to go a completely ...
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54 views

mdadm package broken, but cannot purge and reinstall

My mdadm package is not fully installed and now when I run apt-get upgrade I see the following error message: Setting up mdadm (3.3-2ubuntu7.1) ... dpkg: error processing package mdadm (--configure): ...
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52 views

How did mdadm change from 14.04 to 16.04

I was using mdadm to spawn multiple copies and also backups of a degraded mdadm Raid1 "array", off which I ran my system. After do-release-upgrade to 16.04 (and even just halfway to 15.04 IIRC) this ...
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33 views

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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25 views

Correcting crashing/grub issues with partially failed install

I had issues completing grub installation on an mdadm system with 16.04, and managed to hack it to boot. However now the system intermittently crashes and continually tries and fails to install grub-...
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30 views

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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27 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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1answer
117 views

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

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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56 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 mdadm....
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206 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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1answer
75 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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78 views

Intel fakeraid using dmraid instead of mdadm during install 14.04. Why?

When I installed 14.04 it detected my intel fakeraid and asked if I wanted to use mdadm. I selected yes and did guided partitioning the entire drive with LVM. it didn't boot correctly. It ended up ...
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27 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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36 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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1answer
73 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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37 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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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 currently-...
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26 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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23 views

SoftRAID array not visible to apps on boot?

My / is located on a single SSD, but I also have a softraid for my apps, games, etc. Most notably, both my Steam library and my Dropbox folder are located on the raid array. Whenever I boot my system,...
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35 views

Ubuntu MaaS 1.9 RAID1 boot from degraded

MaaS 1.9 came out with a new feature of creating raid arrays with mdadm. I would like to use this to create redundant boot disks of a server which has no hardware raid. MaaS only allows one boot ...
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44 views

Auto-mount flashcache'd drive (RAID array) on startup

I have recently created a RAID5 array with mdadm and cached it through SSD using flashcache. Everything works great, however I cannot make the drive to be mounted on system's startup: Every time a get ...
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43 views

Cannot create RAID5 Ubuntu Server 14.04

I'm trying to configure RAID5. I know this question has been asked before but I have been stuck on this for 3 days. Input: sudo mdadm --create /dev/mdo --level=5 --raid-devices=3 /dev/sdb1 /dev/sdc1 ...
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2answers
29 views

RAID5 disappears after reboot

I am struggling with setting up RAID5 for my workstation running Ubuntu. Having read a plenty of guides and tutorials I managed to: create a RAID5 array from 3 disks in Intel RST ROM Utility setup ...
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1answer
57 views

Recovering a healthy RAID disk from an Ubuntu server: mdadm no recogniseable superblock

I've had a series of different issues with recovering a RAID disk, ending with the error reported in the subject. Please skip the long story to come to the conclusions if you want. Long story: I ...
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1answer
70 views

mounting raid1 root partition after mdadm: create group disk not found

i seem to have this problem: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1335642 though #4 is not working for me i can boot live system and with mdadmn --assemble --scan i was able to ...
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67 views

mdadm: partition is not a block device

I was trying to create a RAID 1 partition by running the command mdadm --create /dev/md0 --verbose --metadata=0.9 --raid-devices=2 --level=raid1 --run /dev/sdc1 missing. But mdadm's response was: ...
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10 views

mdadm raid superblocks gone after a power cycle and moving the array ?

Our RAID superblock issue has many of the same details as this We have not been so lucky to see the raid again to recover data and start over . What complicates our issue is this is a 24 disk ...
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1answer
58 views

How to restore mdadm raid 1 from one HDD

I had 2 HDD's as /dev/md0 where was simple RAID1(mirror) with one partition. First it was created /dev/md0 and then there was created Filesystem. Now I have only one HDD from this RAID and i want ...
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51 views

How do I create a software raid on non system drives in Ubuntu 14.04?

The OS is installed on a standalone SSD, but I have 3x 1TB drives I want to configure in a RAID 5 for docs, applications, games, etc. How do I do this? I've searched Google but the only results I ...
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31 views

Cannot boot into Ubuntu, software Raid setup, cannot find boot partition (e.g. /dev/sdXX)

really hoping someone will be able to help me out. As a disclaimer, I've previously posted this question on the Ubuntu forums, but had no joy. I've tried to check if it was okay to also post it here, ...
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28 views

mdadm raid1 not recognized if the HDs are put in another bay

I have created a RAID1 2TBx2 using mdadm in Ubuntu. The two drives are in an external bay (Icy Box IB-120StU3-Wh Dual Bay Docking Station) connected via USB to the laptop. Everything works fine. ...
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49 views

GRUB could not be installed on softraid (mdadm on 14.04.03 server)

I ve got some problems with installing latest 14.04.3 The bug is described here. After using mdadm to create software raid5 (3 HDD) partition, the GRUB refuses to install. Updating the update-grub ...
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2answers
101 views

Can I transfer my mdadm Software raid to a new system in case of hardware failure?

I have minimal experience with mdadm and software RAID, but I have a Dell Poweredge T110 II with two separate RAID 0 arrays, a total of two drives each array. I'm anxious that the software setup won'...
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1answer
20 views

Ubuntu 14.04 fails to recognize FakeRaid volume

I'm trying to setup Ubuntu 14.04 AMD64 on a new machine based on an Asus Z10PE-D8 motherboard with Intel FakeRaid. The boot drive is an SSD with dual boot Windows 7 and Linux. I also have two ...
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63 views

Failure to mount raid array after upgrade to 15.10

I need help fixing my RAID arrays. here is what happened: I previously used ubuntu 14.04 with an SDD for the system and two identical 1TB drives as RAID1 array. Each drive is partitioned in two ...
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36 views

Migrating from dmraid to mdadm

I have a problem that a 6.9TB RAID5(FakeRaid) logical volume is shown as 3.2TB in Ubuntu. Some study on the web and I found that this may be because dmraid is being used while mdadm has better support ...
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44 views

Raid 5 Array will not start and one drive failing SMART test

First of all please forgive my noobieness but I will try to provide as much info as complete as possible. I had recently experienced a power outage that resulted in my Raid 5 Array from starting. ...
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66 views

After Installation Ubuntu Server 14.04 Show Blank Screen and can't Login (Problem with Raid)

I have a home server with below specification: - Asus Z87-C motherboard - 2 Internal Network Card (One On board and One PCI) - 2 X HDD 1TB (RAID1-Mirror through motherboard solution - Not Software ...
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23 views

Ubuntu 14.04.3 LTS - RAID 5 volume vs capacity discrepancies

I currently have a RAID 5 setup on an Ubuntu 14.14 RAID setup includes (3) 2TB disks. The RAID /dev/md127 is showing 4.0 TB in size. Which would be correct I believe on a RAID 5 setup with 6.0 TB in ...
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27 views

Setting up a RAID 1 NAS with a seperate OS HDD?

So I'm a solid ubuntu-amateur with only a year of experience or so hoping to put together an ubuntu-samba file server and looking to learn more. I have seen a couple tutorials however the tutorials ...
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31 views

MDADM Superblock can't be read - raid 1 mirror

I have a ubuntu linux box, with a raid mirror, 2x3TB using mdadm It's not the system disk, but a raid 1 mirror that contains my files. After power cut, restarted and now getting "can't read ...
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1answer
122 views

Building a light weight home server/NAS. Question on RAID and filesystems

I'm planning a build that will be using Ubuntu Server 14.04. I have been trying to learn as much as possible and practice in virtualbox before actually installing any hardware. I am really enjoying ...
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2answers
131 views

How to Install Ubuntu Desktop on RAID 1

I am having to rebuild my Ubuntu MYTHTV system (RAID 1) on new hardware due to power supply failure taking out major components (originally built on Feisty). I understood that RAID support was being ...
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1answer
19 views

Kubuntu one SSD of mdadm and Nvidia drivers fail to load at same time

My problem seemed to start during a manual update although I don't know if that was coincidence or causal. About 20% of the way through downloading the update, it just stopped. I left that window ...
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47 views

RAID array somehow has extra drive, how to remove using mdadm?

I have a simple RAID 1 array as follows: sda (2TB total: partition1: 15GB partition2 1.8TB) sdb (2TB total: partition1: 15GB partition2 1.8TB) md0 = RAID1 15GB md1 = RAID1 1.8TB Somehow, md0 ...