a utility to administrate Linux Software RAID devices

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raid mdadm “active,resync” after reboot

I created a raid1 (Intel RST + Ubuntu Server 64Bit). I waited until the mdadm status of the raid changed to "clean". All worked fine. But I noticed that after every reboot, mdadm shows "active,resync ...
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11 views

Cannot mount hardware RAID 5 in 14.10

I just installed Ubuntu 14.10 and I have a hardware RAID 5 array of 3 disks that I cannot figure out how to mount. I have mdadm installed but it doesn't seem to be able to detect the array, however ...
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13 views

How to fix RAID1 array by mdadm with script?

In system works two RAID1-arrays madadm. There is one reserve disk to change faulty disk. I need to write a script which will be monitoring disks and automatically fix degraded array. How do you ...
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18 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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12 views

Move RAID 1 Array to new system

I am rebuilding my Ubuntu home server, but I want to preserve my two disks currently in Linux software RAID 1. My current config is: One 240GB HDD configured as OS Disk (Ubuntu 12.04 LTS) Two 3TB WD ...
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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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16 views

Why do I see permanent disk activity on my software raid partition (/home)

I installed Ubutu 14.04 server with this partitioning: / on an SSD /var and swap on a single SATA drive /home on a software raid1 consisting of 2 SATA drives. I switched all partitions to noatime. ...
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2answers
68 views

Setting up RAID 1 on 14.04 with an existing drive

I have a currently installed Seagate ST3000DM001 (about 90% full) and a new Seagate ST3000DM001 (blank). I would like to setup RAID 1 without losing the data on my currently installed drive. If I ...
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1answer
31 views

Creating a RAID1 Array, “Disk doesn't contain a valid partition table”

I'm trying to create (two) software RAID1 arrays on two identical 4TB non-boot drives. I'm following advice from several forum posts but keep running into trouble. Here's what I've done so far: for ...
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55 views

How to make Intel fake RAID 0 volume appear on boot with Ubuntu 14.04 in a multi-boot environment?

I have a computer with a Gigabyte GA-Z97N-Gaming 5 mainboard, a 256 GB drive for booting and two 3 TB drives meant to use in a RAID 0 setup with both ext4 and NTFS partitions. We are planning running ...
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1answer
51 views

Ubuntu installed /home to visible RAID array, but can't find it on boot

I'm using the Desktop version of Ubuntu 14.04.1. I started up the liveCD, installed mdadm, and created a RAID 1 array on a 3 TB HD. I then restarted, went directly into the installation menu, and ...
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5 views

data distribution after adding additional disk in raid 5

"I had set up raid 5 by equal capacity with 3 hard disks in ubuntu 12.04 and I need to perform scaling.After adding 1 disk,how to monitor the data distribution and possible inputs.Is it possible?"
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36 views

Fresh install of 14.04 server edition doesn't boot

I've installed ubuntu 14.04 server, but on power-up I get the error message "Reboot and Select proper Boot device", even though I've set boot priorities correctly. The server is going to be a NAS. It ...
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1answer
64 views

OVH - Dedi 14.04 Server - Raid Reconfiguration Help for a Total Noob

I am a linux noob and have been saddled with a problem far beyond my abilities. My situation is this: This box: http://www.soyoustart.com/us/offers/bk-24t.xml (6x4TB drives) OVH image based ...
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1answer
24 views

Can't Reboot mdraid

I just created a raid 0 array with the following commands: # Install the necessary packages sudo apt-get install xfsprogs mdadm -y # Create the RAID 0 array. mdadm --create --verbose /dev/md0 ...
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42 views

Create a RAID5 on my Ubuntu Server 12.04

I have an operational Ubuntu Server 12.04 with only one HD (1Tb). I need more capacity and stability, so I bought last week 3 HD(1Tb each) to make a RAID5 and migrate the information of the old HD to ...
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43 views

Extra RAID array keeping disks busy

I have a software RAID-5 with 5 disks (Seagate ST31500341AS). SMART was saying that one was at risk of IMMINENT FAILURE. I replaced it with a new disk, also a 1500GB Seagate. The array wouldn't start ...
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58 views

Degraded mdadm RAID5 array & ARRAY UUIDs mismatch (Ubuntu 14.04.1)

Every reboot on my server results in a halt due to a degraded RAID5 (software) array. The same drive /dev/sdc appears to be dropping out each time. I ignore and boot with a degraded array any ways. ...
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28 views

I lost my raid…(it won't load)

After plugging in an extra drive I lost my raid drives. In the drives GUI it shows all of the raid drives as connected but when I go to start the raid it says: /dev/md/Storage assembled from 1 ...
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27 views

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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14 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
55 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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139 views

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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39 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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54 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
678 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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72 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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54 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
94 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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94 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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22 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
57 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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47 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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83 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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182 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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63 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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21 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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13 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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27 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
55 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
40 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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78 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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214 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
195 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
66 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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133 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
95 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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34 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 ...