a utility to administrate Linux Software RAID devices

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format/build raid 5 with one 4k drive, three 512b

I have 4 WD 1TB drives which I want to 4x1TB Raid5. I am not sure what course of action to take next. How do I configure my 4th drive (sde) to align with the rest? Will this affect performance? I ...
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10 views

Installation with FakeRaid

I have a problem while installing Ubuntu on my laptop. Actually, Windows 8 is installed with a raid0 managed by the Intel Rapid Storage Technology. At first, I tried to install without delete this ...
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8 views

How to select the number of mirrors in a raid10 with mdadm

i know ho to create a raid10 with mdadm but i don't know what is the parameter for select the number of copies. I have 6 hard drives. Using the default values it will make only a copy of 3 hard ...
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1answer
35 views

Drive failure in Raid1. Can't replace

I have a software raid1 and mdadm emailed me that a drive failed. Following steps I found online, I marked as failed and removed the drive from the raid. I replaced the drive with an exact make and ...
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+50

14.04 - Replaced drive in Software RAID 1 - How to make bootable?

I have an Ubuntu 14.04 x64 server with 2 500GB drives (sda and sdb) in a software RAID 1. I just had to replace sdb. Adding it back to the array with mdadm and resyncing was a snap. The problem I'm ...
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17 views

RAID 0 Superblock recovery?

Cool, I have a Synology Diskstation 212j, with 2x3TB drives in RAID 0 (I know, I know, I was very naive; never had a drive failure before). About a month back the volume crashed, I recovered the ...
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30 views

64 Bit Xubuntu on Full Software Raid 0 Using Mini.Iso

What I am asking is doable but the thing is I forgot how to do it since the last time I did. I recently upgraded my Ram to 8Gb from 2Gb. I am using an Asus Maximus Extreme with an intel core 2 duo ...
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1answer
145 views

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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45 views

Raid Won't Mount After Reboot

I'm building a new Ubuntu 14.04 server with RAID. I partitioned the operating system and swap partition on a small harddrive and have the RAID strictly for files. After adding a new disc to the RAID, ...
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53 views

My (older) computer has become unbootable except for ubuntu minimal CD - RAID mdadm

I really hope someone can help me out here because my computer has become unbootable, and it holds a RAID-5 data disk Array (mdadm ) which I need to recover. No OS will boot, nor USB, nor DVD, nor ...
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1answer
63 views

Ubuntu with system on mdadm, broken grub, won't boot

My old disc started failing so I decided to change it. While moving data to a new disk, seeing how big it is, I though it would be a good decision to split the disk and add some insurance with RAID1 ...
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51 views

problems with creating a raid 5 array

when ever I try creating a RAID setup with the disck utility it gives me the following error: Error creating RAID array: Error spawning command-line `mdadm --create /dev/md127 --run --chunk 512 ...
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1answer
20 views

How to remove fakeraid

I had a RAID 1 setup using by bios. Ubuntu was installed on the RAID array. I want to move to a software RAID 5 using mdadm with 3 disks. I have deactivated the RAID 1 in the bios, copied the ...
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1answer
43 views

RAID10 write speed decreased to normal SSD speed after rebuilding the array

OS: Ubuntu 14.04 LTS Software Raid10: 4x120Gb Intel 530 SSDs Server: HP ProLiant DL160 G6 FS: md0: ext4/ md1:swap Test is made on fresh new install, before making any change to some package or ...
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33 views

RAID 0 recovery from lacie NAS

I am in desperate need of some assistance by the more experienced users out there! I am trying to rebuild a RAID0 that is composed of two 2TB Hard drives. These come out of a LaCie Ethernet BigDisk ...
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36 views

2-disk RAID array missing one disk. fdisk sees them both. Missing disk is “non-fresh”. What to do?

I have two physical 500 GB hard disks in my Ubuntu 12.04.4 PC and they are supposed to be in a 2-disk RAID array. However, mdadm -D /dev/md0 is reporting that /dev/sda seems to be inoperative, even ...
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90 views

mdadm /dev/md0 fails to load on boot

I am running mythbuntu 14.04 with a raid 6 setup using 10 hds. Every time I boot my system, mdadm fails to load. I have to run the following commands to get access to the system: All commands run ...
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48 views

Stuck setting up RAID 1

I've tried switching to linux many times before and each time came up to a problem and ended up giving up. This time I hope things are different. I have a home server: P8Z77, 1xSSD (with Ubuntu 14.04 ...
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19 views

Add disk and use software raid

I have a lvm partition on a disk, and another, identical drive with no data on it. Would it be possible to set up these two drives in RAID 1 using mdadm, with the same lvm data on top? Perhaps by ...
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12 views

Raid: how to address the error on “--remove”?

I first stop the raid array, % mdadm --stop /dev/md127 mdadm: stopped /dev/md127 then do a check, % mdadm --detail --scan ... the array is no longer shown. then I do remove % mdadm --remove ...
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21 views

How to rebuild mdraid metadata?

I somehow hot swapping a failed hard drive on Ubuntu 14.04 LTS Server running mdraid RAID1 array without marking the failed drive to fail and remove it via mdadm. I successfully add another drive on ...
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1answer
40 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
33 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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61 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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152 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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1answer
119 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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27 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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1answer
55 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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104 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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2answers
85 views

Valid SSH command to create a RAID5? [closed]

Valid SSH Commands for creating and rebuilding RAID5 with 4 drives: To create a RAID5 with 4 hard drives: mdadm --create /dev/md1 --level=5 --raid-devices=4 /dev/hd[abcd]5 To rebuild a RAID5 with 4 ...
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27 views

Will sas or sata controller play with onboard sata controller using MDADM Raid 6

I currently have a linux mdadm Raid 6 setup on a supermicro server board using a total of 6 ssd drives. I would like to add more. If I buy one of the available PCIe sas or sata controllers to expand ...
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416 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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217 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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1answer
6k 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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18 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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147 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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194 views

“Device not found or ignored” when creating physical volume with bcache

I'm attempting to create an LVM volume on a bcache device, but getting "device not found or recognized", despite lsblk clearly showing the device, and bcache state showing "clean". OS is Ubuntu 13.10 ...
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1k 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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1answer
66 views

No more Diskspace after disk change, mdadm / Raid6

I had a Raid6 with 2TB disks, and have now replace all of them with 4TB disks. I pulled them out one at the time, after installing the new 4TB disk I added to /dev/md2 mdadm --manage /dev/md2 --add ...
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1answer
99 views

Need help properly setting up raid5 (align then mount)

Trying to ¨start over¨ and following this guide: http://dennisfleurbaaij.blogspot.com/2013/01/setting-up-linux-mdadm-raid-array-with.html I used fdisk and mdadm to create a raid 5, and I believe I ...
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97 views

mdadm array disappeared

I was moving my mdadm array from my old machine to a new one. As the new one was not able to see it, I tried to put it back, but I seem to have lost all superblocks. Only 1 drive has a partition. ...
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1answer
242 views

Software RAID 5 Disk Failure

I'm going to need some expert help - free beer/coffee to anyone who get's me on my way! My System I'm running Ubuntu 11.10 with a 3 disk software RAID 5 configuration, with 3TB hard drives, in ext4 ...
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32 views

I've made a bit of a mess with my hd and raid setup

I'm using ubuntu 12.04.4 Server and this is my current setup: My hard disks: wax@petra:~$ sudo fdisk -l /dev/sda Disk /dev/sda: 1500.3 GB, 1500301910016 bytes 255 testine, 63 settori/tracce, 182401 ...
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33 views

Mdadm Raid 5 Issues

Not really sure where to start. Pretty new to both raid and ubuntu so sorry in advance for any dumb questions. well here we go. Been having some raid troubles lately, I got a raid5 array with 6 ...
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35 views

Cleanly shutdown on read-only root partition - cant sudo

My /dev/sda dropped out for some reason on my server box (12.04.4). This made Ubuntu remount it as RO which is fine but now I cannot shutdown the system cleanly. Is there any way to deal with this? ...
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39 views

mdadm large memory consumption

I'm building mdadm RAID 6 (8 WD Red 3 Tb) on Ubuntu 13.10 x64 server with ext4 file system. When I download torrent on the array, server RAM is filled for maximum cap (8 GB). Memory becomes free when ...
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37 views

All data gone from healthy raid5 array

I have an issue with my Raid 5 array that is puzzling me. The PC crashed yesterday and after a reboot my raid 5 array was empty. cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [linear] ...
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1answer
116 views

Bash script fault creating mdadm array

I am working on a script to create md1 array, first to check if the array exist if not it will create it. I get command as command mdadm not found and a few others. The script wont run. ...
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1answer
70 views

How to check if last command succeeded and make that command auto accept prompts?

I am working a script to create a raid5 array. The question is how to put the command in a if (to see if the command succeeded), and when the script ask to continue creating array it will auto say ...
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1answer
228 views

Bash script to check if mdadm is installed if not it will install it

Working on a bash script which first will check if mdadm is installed, if not it will install it. This is my script but it's not working correctly. Hope someone can help me. if [ "$mdadm" = "mdadm" ...