a utility to administrate Linux Software RAID devices

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1
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2answers
805 views

Recover Orphaned RAID 0 from Silicon Image controller with Linux Software RAID?

I had an old XP machine in Raid0, 2 x 120gb drives on a Sil3112 controller. The drives are intact (afaik) but the motherboard or P4 is toast. Id love to recover precious photos from the drive or dump ...
0
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1answer
400 views

Mdadm RAID 5 failed, 1 drive bad 1 good 2 working

Sorry if the title was a little confusing but I wanted to show a little info. So I went to turn my pc on and ended up with the nice screen of having a failed array. /dev/sdb1 and /dev/sde1 are within ...
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2answers
3k views

Ubuntu 13.10 software raid

I had already Ubuntu OS installed on my desktop PC, where the software RAID 5 is configured ( 3 partitions /, swap and home ). This system was upgraded from the 11.04 till 13.04, it was quite messy, ...
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2answers
937 views

mdadm automount

I have a system running ubuntu 13.10, booting from a 50GB SSD. Attached to the motherboard are also three 2TB disks. configured into a 4TB RAID array. After ubuntu boots, I can mount the RAD volume ...
0
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1answer
75 views

How to install software to OS on other disk?

Have installed 13.10 on a RAID1 array following this guide: http://www.michielovertoom.com/linux/ubuntu-software-raid/ Everything went fine, except for the last step where I'm supposed to install ...
2
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1answer
337 views

Raid 5 mdadm --grow drops performance, no increase in disk size

I've set up a Raid 5 system at home for the first time. I've added 3 disks into the pc, and parted them all in 1 partition of 8G, and 1 partition of the remaining 492G then I made 2 raid volumes with ...
0
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1answer
650 views

recovering raid5 (mdraid) after clean OS install (Ubuntu Server 12.04)

======== After having to reinstall the OS I am having trouble accessing data stored on a RAID5 group built on 8 HDDs using mdraid. Advice much appreciated! I have a DIY home NAS server built on ...
1
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1answer
163 views

Raid drives are missing filesystem

I recently had to do some troubleshooting with a RAID 5 on Ubuntu Server (a software raid). I ended up removing everything and start from scratch with 2 new drives. So I took out 2 out of 4 drives, ...
6
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1answer
8k views

How can I create a RAID array with >2TB disks?

I would like to know the correct way to set up a software RAID array on an existing server. I have two brand new 3TB disks to use for the array. Specifically, I want to set up a 3TB RAID 1 array, ...
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3answers
4k views

Software Raid0 doesn't mount successfully in fstab

I have created a Raid0 and it works as I expect it. The the array file is created at /dev/md0. I want this to be mounted automatically by adding this line at the end of the /etc/fstab file : /dev/md0 ...
0
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1answer
142 views

ATA failure on a RAID5 array

I've been getting some RAID5 failures for some time when under heavy load. I've always been able to force reassemble the array after a reboot, and the Event count between the dropped disks and the ...
1
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1answer
2k views

How to install ubuntu on a raid 5 array using mdadm

I want to install Ubuntu 13.04 (not server), I have 4 empty hard drives (/dev/sda, /dev/sdb, /dev/sdc, /dev/sdd), each 150 gb and /sdd is 160 gb and I have a Live USB. I want to install Ubuntu on a ...
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0answers
647 views

Raid Issues Cannot Boot and Getting Superblock Errors

I am getting the errors below. How do I get the RAID array fixed. I'd like to get it mounted via the live cd that im booted into as well. Just so I can backup a few items. My setup boots from the RAID ...
1
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1answer
2k views

RAID 5 Inactive at boot - error: found two disks with the index 1 for RAID md/0

My OS is Ubuntu 12.04.2 LTS with this kernel: 3.2.0-49-generic #75-Ubuntu SMP Tue Jun 18 17:39:32 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux I have a raid 5 array composed of 3 hard drives and suddenly, ...
1
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1answer
2k views

How do I migrate to a RAID10 array without losing data

I am running Ubuntu 12.04LTS, OS is installed on a small SSD so that should not be an issue when modifying the RAID array(s). I currently have four 2TB WD Caviar Green drives that I would like get ...
0
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1answer
82 views

MDADM - Degrading when copying files to share

We have a Ubuntu 12.04 LTS server which is configured with a 2 disk software 1 RAID (mdadm). The disks are 3TB and partitioned with a 1MB GPT partition and with the remaining assigned to the RAID. ...
2
votes
1answer
3k views

How to grow RAID 1 following disk upgrade?

I have successfuly replaced 2 x 320GB disks with 2 x 1TB and re-synched /dev/md0 & /dev/md1. "sudo mdadm --grow /dev/md0 --size=max" results in error "mdadm: component size of /dev/md0 unchanged ...
0
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1answer
1k views

How can I set up FakeRAID/SoftRAID using mdadm without losing data?

There is RAID0 of 2 drives connected through Silicon Image 3132 SATA SoftRAID controller. Under Windows it was partitioned as one dynamic GPT-disk having 4 TB NTFS volume. There is a lot of music and ...
1
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1answer
870 views

RAID1 array lost after upgrade from Ubuntu 11.10 to 13.04

I had a working Ubuntu 11.10 with / on an SSD (/dev/sdc) and /home on a software RAID1 array that resided on two partitions on /dev/sda and /dev/sdb (identical drives), respectively. This was set up ...
4
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1answer
365 views

Upgrade to 12.04LTS dumps to busybox on boot

I just upgraded my server from 10.04LTS to 12.04 LTS using the server upgrade process documented here: https://help.ubuntu.com/community/PreciseUpgrades. On boot, I am now dumped to the busybox shell ...
2
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0answers
107 views

RAID 5 array mdadm add command no response

On ubuntu server, I have a software RAID 5 array, four 2TB drives. One of the drives died, I sent it in and got a replacement. I put the replacement in my server, used an sfdisk command to set the ...
7
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1answer
10k views

How to re-add accidentally removed hard drive in RAID5

I have a NAS on Ubuntu Server with 4 2TB hard drives in RAID 5. A couple of weeks ago, one of the hard drives died, but my RAID was working, although degraded. Luckily it was still under warranty and ...
0
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1answer
255 views

Need to reboot twice when Ubuntu 12.04.1 mdadm RAID1 degraded

I'm testing mdadm RAID1. I'm using two HDD. Created / (/dev/md0 with /dev/sda1 and /dev/sdb1) and swap (/dev/md1 with /dev/sda5 and /dev/sdb5) After OS installed. I removed one HDD and reboot the ...
0
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1answer
2k views

RAID array: cannot access files on one partition, getting Input/output error

I'm hitting an access error with part of a raid array and need help in troubleshooting this. History: Several raid partitions live on 4 disks. Four days ago some ticking noises were heard from the ...
2
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0answers
70 views

I grew an array with mdadm but I can't see the progress?

Today I added a 5th drive in my array, I did the following: mdadm --add /dev/md0 /dev/sdf1 My drive was added as a spare, I then did: mdadm --grow /dev/md0 --raid-devices=5 But when I want to ...
2
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0answers
792 views

how long should it take to create a raid 10 with 4 3TB disks?

I am trying to create a raid 10 with four 3TB disks on ubuntu 12.10 with mdadm. I was wondering how long should it take to create the raid. Right now when I look at /proc/mdstat it is showing 19107 ...
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0answers
591 views

Is there a fix for md raid failure on 12.04

I've got a system that ran cleanly on Ubuntu 10.04 LTS. Upgrading to 12.04 LTS / 12.04.1 LTS / 12.04.2 LTS has been unpleasant and unsuccessful. Install goes cleanly and I have installed as follows: ...
5
votes
1answer
2k views

MD + LUKS + LVM will not cleanly shutdown

My setup is currently raid1 + luks on each md partition and lvm on top to stripe between the arrays. There is only one volume group with one logical volume currently. sdc ...
3
votes
4answers
4k views

Convert running system to RAID 5

I have a machine with 3 identical disks. I performed a clean installation of ubuntu 12.10 on one disk. How can I convert the running system to boot off a (software) raid5 comprised of all three disks ...
2
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3answers
720 views

Problem with LVM over mdadm with NTFS. Is it possible?

I am a bit of a linux newbie, and i have come across an error that i dont really know how to troubleshoot. my idea is to cram 6TiB drives into a box, make three sets of raid1, then stretch a logical ...
1
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1answer
437 views

RAID (mdadm) - Flags necessary?

As I understand it, it's best practice to set the drive flags as "raid" before adding them to a mdadm raid array. Okay fine, but I also heard people say that they didn't do this and mdadm worked fine. ...
4
votes
1answer
8k views

Can I cache an mdadm raid with an ssd?

I have a 1TB array set up in raid 1 using mdadm on Ubuntu 8, to store mission-critical files. I'd like to speed up read/write, especially for large files by caching to an SSD. Is this possible? Does ...
6
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2answers
7k views

RAID (mdadm) - What happens if drives are mismatched in size?

Question 1 - Before you answer with "it just takes the smaller disk", hear me out quick. My 3TB WD Reds come out to be 3001 GB in size. Let's say I set up a mirror via mdadm for sdb1 and sdc1 which ...
0
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1answer
482 views

RAID (mdadm) - File system relevant prior to building the array?

In the event I want to set up a RAID 1 mirror utilizing mdadm, is it needed to have a file system on the drives first? Reason I ask is my desktop which has RAID 1 (built from the alternate install CD) ...
8
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1answer
46k views

Software raid - mdadm - re-find my array

Description Today I plugged in another hard drive and unplugged my raid drives to ensure when I wiped the drive, I would not accidentally pick the wrong drives. Now that I have re-plugged in my ...
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1answer
3k views

Ubuntu 12.04 hangs on boot, won't mount mdadm array

I have two problems that I believe are related. One has been happening for years through multiple versions of Ubuntu (at least from 11.10 to 12.04), the other is new since I update the kernel. First ...
1
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1answer
3k views

How do I fix “mdadm: /dev/sdc1 not large enough to join array” for three identical discs?

After uppgrading to Ubuntu 12.04 LTS in my server grub started to complain and give errors about my raid array, everything still seems to be working but it is a bit unnerving to have grub giving ...
0
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2answers
2k views

Would Mdadm be faster than fake raid adapter?

I just bought myself 2 x 3tb wd red drives and a startech 4 port raid card . Unfortunately, I have a very, very strong suspicion that this is a 'fake-raid' card as it is not from any of the main ...
1
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1answer
8k views

How to make GRUB2 detect and boot Ubuntu on a RAID 1?

grub 2 is unable to detect /dev/md1 which is a raid 1 drive on my computer. When I press c in grub menu and run ls I get a list of all the drives but don't see md1 for booting Ubuntu which is on ...
3
votes
2answers
3k views

New computer, same RAID. MDADM won't assemble

Ubuntu 12.04 64. Hardware failure (motherboard) led me to build a new machine, and I took the opportunity to do a fresh install of Ubuntu (first one was a learning experience). I moved the raid disks ...
3
votes
1answer
993 views

RAID 5 reassemble stating wrong homehost?

So I went from a degraded RAID, to a dissasembled RAID, to now trying to reassemble it. Im getting a weird message when trying to --assemble the RAID. I have 6 drives, so /dev/sd[a-f]1. When trying to ...
0
votes
1answer
224 views

Ubuntu 10.2 to Ubuntu 12.04 LTS migration with mdadm (software RAID)

I am very hesitant to push the "Upgrade" button that I see in my Software Updates program. The reason for this is the fact that my server is configured as Backup server with software raid. Is there ...
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0answers
2k views

Recovering from RAID5 with 2 failed drives, only one of them really dead

I have (had?) a RAID5 with 3 devices. One of them died, and after some days I experienced that the RAID stopped at all. However, I could restart it without experiencing any problems, but it stopped ...
2
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3answers
19k views

How can I create one logical volume over two disks using LVM?

Hi. I've got a working Ubuntu 12.04 server, which is going to serve as media server. I've added two disks of size 3TB to put my data on, and I wish to combine these as one 6TB logical volume which I ...
0
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2answers
6k views

Add two new HDD in Raid 1

I just made a fresh install of Ubuntu 12.10 on a new SSD (/dev/sda). Now I would like to add two 1TB drives (/dev/sdb /dev/sdc) in RAID 1 but I'm pretty clueless on how to do it. This is what I came ...
2
votes
2answers
6k views

Ubuntu Server 12.04, MDADM device number suddenly changes?

I'm facing a really annoying bug, I have set up a Software RAID1 with mdadm, and the setup went just ok with this results /dev/md/lucas.mgscreativa.com.ar:0 I have also configured mdadm.conf ...
16
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4answers
27k views

Why is my RAID /dev/md1 showing up as /dev/md126? Is mdadm.conf being ignored?

I created a RAID with: sudo mdadm --create --verbose /dev/md1 --level=mirror --raid-devices=2 /dev/sdb1 /dev/sdc1 sudo mdadm --create --verbose /dev/md2 --level=mirror --raid-devices=2 /dev/sdb2 ...
3
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2answers
7k views

Removing mdadm array and converting to regular disks while preserving data

I have a 6 disk (2TB each) mdadm RAID 5 volume created in Ubuntu 12.04 Server. However, I'm moving to a different solution and want to "unraid" my disks but keep the data. Only 50% is in use. From ...
2
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1answer
3k views

mdadm fails after 10.04 -> 12.04 upgrade

I just upgraded my Ubuntu server (in the role of NAS) from 10.04 to 12.04. Since both are LTS versions I didn't expect any issues and... didn't make any backups. My bad. After upgrade, the server ...
3
votes
1answer
264 views

OS drive failure and RAID5 mdadm question

I'm fairly new to Ubuntu but I was able to setup my server with RAID5. The OS resides on a separate drive and there are 3 drives in my array. The problem is that I had to reinstall my OS on a new ...