0
votes
0answers
14 views

Can I pass disks through Hyper-V to a Linux VM for md RAID on any hardware?

I toyed with the idea in the past few months of virtualizing a workstation machine (with ESXi/Xen/etc), basically having it run some very basic server stuff behind the scenes; this was more of an ...
0
votes
0answers
27 views

Build one logical drive from hdd and ssd drives (with a tweak!)

How is it possible to build one logical drive in linux from two physical drives, hdd + sdd with the below rules: All writes are replicated to both drives (Kind of RAID 1). All reads are only ...
0
votes
0answers
29 views

mdadm raid 6 stuck on rebuilding

I have a raid 6 running consisting of 9 1TB drives. Some time in the last couple of days, one of them became faulty and the raid startet rebuilding. But apparently it is stuck ... This is the raid: ...
0
votes
0answers
37 views

How to set boot disk after disabling mdadm raid 1?

I had two disks in raid 1. The device contained the whole system. Disabled it from a rescue disk with: (there were three partitions) mdadm --stop /dev/md1 mdadm --stop /dev/md2 mdadm --stop /dev/md3 ...
3
votes
0answers
49 views

mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?

My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
1
vote
0answers
27 views

Redundancy: LVM+mdadm or LVM internal RAID

The task is to create LVM storage for virtual machine images. So LVM will be used in any case. There are two ways LVM providing redundancy: block mirroring lvcreate -m 1 --mirrorlog mirrored -n ...
0
votes
0answers
86 views

Hybrid Raid-1 HDD + SSD — Write Intent Bitmap

I am currently running a laptop with 1 HDD and 1SSD. I currently am using mdadm to put some partitions in a raid 1 configuration with --perfer-write set on the HDD. I have this working correctly ...
0
votes
1answer
218 views

Understanding /proc/mdstat [U_] VS [_U]

My server is set up with raid1. A few nights ago sda fell out completely and data was corrupted. I replaced the drive, cloned the partition table and added the respective arrays. While adding sda3 ...
1
vote
0answers
22 views

Is there a safe way to move a partition beneath a linux software RAID5 using mdadm?

Suppose, for example, that you have a RAID5 across multiple disks and you would like to retire the oldest of the disks and replace it with something from this decade. I know I can fail the partition ...
0
votes
1answer
69 views

Recover software RAID

I built a RAID-1 with two hard drives using mdadm. Command used was: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc it went fine, I create partition table and partitions in ...
0
votes
0answers
65 views

Raid drives 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, ...
0
votes
1answer
115 views

Adding sda1 vs. sda to a linux software raid

I'm running a Linux md software RAID 6 on several USB hard-drives. Each drive is partitioned to contain one partition of type fd (linux raid). My RAID is built on these partitions, i.e. it uses sda1, ...
1
vote
1answer
404 views

Assembling an mdadm array with “possibly out of date” disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...
0
votes
0answers
25 views

Madm scan less uuid's than drives

I have a raid6 array with 5 disks(was started with 4 and then added on on-the fly - without rebooting). I have noticed something a bit strange when i was preparing to add a new drive : mdadm ...
1
vote
0answers
38 views

erased md0, md1 and can't recreate them

I previously had a working RAID 1 array. I think as a result of running grub-install /dev/sdb and grub-install /dev/sdc I somehow wiped my computer of md0 and md1. I need to set them up again. When ...
3
votes
1answer
600 views

mdmda raid 1 - spare drive after SATA cable change

Yesterday my hoster changed a SATA cable of one of my hdds, when my server came back up again cat /proc/mdstat showed this Personalities : [raid1] md124 : active raid1 sda1[0] 4193268 blocks ...
1
vote
0answers
108 views

Is `dmsetup remove` safe with respect to contained data?

I have a "lost" SW RAID array as described in this question: http://askubuntu.com/questions/311024/raid1-array-lost-after-upgrade-from-ubuntu-11-10-to-13-04. I have now identified a way to mount one ...
1
vote
1answer
183 views

Documentation for mdadm bad block support

I've read a bit about that mdadm (and the kernel) now have bad block support but I am having a hard time finding any useful documentation on this subject. Is the bad block list for disk X duplicated ...
1
vote
0answers
173 views

Upon reboot, Linux software raid fails to include one device of a RAID1 array

One of my four Linux software raid arrays drops one of its two devices when I reboot my system. The other three arrays work fine. I am running RAID1 on kernel version 2.6.32-5-amd64 (Debian Squeeze). ...
1
vote
2answers
416 views

Convert RAID 1 to RAID 10 in mdadm

In my current Ubuntu server, I have 2x 2TB Western Digital RED hard drives in a RAID 1, using mdadm. I would like to add 2 more 2TB RED drives, and convert it to a RAID 10. I realize I would have to ...
0
votes
2answers
65 views

Writing to a specific drive with software RAID4 on Linux

Edited to reflect conclusions from comments: I want to construct a software RAID-like array with 2 storage devices plus one parity device, where the parity device maintains the XOR of the two other ...
3
votes
2answers
10k views

How do I reactivate my MDADM RAID5 array?

I've just moved house which involved dismantling my server and re-connecting it. Since doing so, one of my MDADM RAID5 arrays is appearing as inactive: root@mserver:/tmp# cat /proc/mdstat ...
2
votes
0answers
464 views

mdadm RAID monitoring no DegradedArray email

So, I have a couple of MDADM RAID arrays and I want to set up monitoring with email notifications for drive failures through sSMTP but I can't seem to get it working. The system in question is a ...
0
votes
1answer
255 views

Adjusting mdadm priority on Ubuntu

I have Ubuntu 12.04 running on my new server, and it is setup to run off of one drive, then 2 drives that are mirrored using mdadm. When streaming files or media from it, it is extremely slow. I was ...
2
votes
1answer
87 views

Why make a partition at all for mdadm/raid?

i have 4 disks, sd[a,b,f,g] of various sizes that I want to 'merge' together. I am using mdadm to achieve this. my question is, what's the difference between -- mdadm --create /dev/md0 ...
1
vote
0answers
420 views

Unable to reassemble md raid on drives pulled from ReadyNas Duo v1

I'm toying with a ReadyNAS device that I've recently acquired. It is a SPARC-based box, and it runs linux. As device is pretty slow, I've pulled one drive out of array, hoping to populate it with ...
2
votes
1answer
1k views

Degraded RAID5 and no md superblock on one of remaining drive

This is actually on a QNAP TS-509 NAS. The RAID is basically a Linux RAID. The NAS was configured with RAID 5 with 5 drives (/md0 with /dev/sd[abcde]3). At some point, /dev/sde failed and drive was ...
1
vote
1answer
187 views

how to boot without assemblying raid arrays (or assembling them correctly)

I had one debian 6 system with two harddisks on raid1 set up via mdadm. built on simple partitions (/dev/sdb3, /dev/sdc3). at least on the old system, everything is tied up via UUIDs. then i inserted ...
0
votes
0answers
48 views

Do a Re-Build During a Re-Shape?

On my Linux software RAID 6 array, I'm currently mid-reshape and 2 drives have been marked as failed. I've swapped them out and added new ones to the array, which are currently marked as spares. The ...
0
votes
1answer
79 views

Linux RAID Re-Shape Stopped

For the past 8 hours my mdadm re-shape process has been stuck. The output is: Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid6 sdo[11] ...
1
vote
0answers
245 views

At what point does RAID 0 stop being fast and just become dangerous? [closed]

I have an interesting RAID setup across 2 harddrives on my home computer. I have /tmp and a mount point(/home/machines) for virtual machines (along with a few other mount points). These partitions I ...
0
votes
1answer
6k views

How can one setup RAID 1 in Linux Mint 13?

I am trying to setup a Linux Mint 13 system using mdadm, with 2 1TB hard drives for a software mirror. I have tried following instructions found for Linux Mint 12, but the instructions fail to mention ...
1
vote
1answer
769 views

Take one disk of external mdadm data raid 1 to travel

I have a mdadm software raid 1 on external disks with media data. For travel I want to take the data with me. I imagine to set the raid and the underlying filesystem in readonly mode and take just ...
1
vote
1answer
3k views

How do I tell mdadm to start using a missing disk in my RAID5 array again?

I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine. When I had it all back ...
0
votes
1answer
946 views

How do I reinitialise a failed RAID 5 drive using terminal on Ubuntu Server

I've currently put together a new system and part of that has been creating a software RAID 5 using 'mdadm' in Ubuntu Server. I successfully got to the point where I create the array using: sudo ...
6
votes
2answers
3k views

mdadm RAID Fast Setup with Empty Drives?

I am recreating some RAID5 disks as RAID6 with mdadm. There is no data on the drives that I care about. Setting up RAID takes a while to setup the shape - I accept that when there there is data that ...
2
votes
2answers
768 views

Can I use an entire drive for as a software raid member?

Can I use /dev/sda and /dev/sdb for my RADI1 configuration? Or do I first have to partition both with a single Linux raid partition?
1
vote
0answers
931 views

mdadm raid5 read error not correctable

I have a software raid5 setup existing of 4 disks. sda, sdb, sdc, sdd Since everything was up and running I wanted to test the array. To do this I pulled the plug on one of the disks (sdd). Everything ...
0
votes
1answer
123 views

How to identify raid1 disks

I would like to know how mdadm identifies physical disks of raid1 . I think it is managed by uuids not device file like /dev/sdc2 /dev/sdd2. But I can`t confirm such information of raid1.
1
vote
4answers
3k views

How do I mount a software RAID1 (mirror) created by windows in Linux using mdadm?

I'm switching my Windows server to Ubuntu and am trying to get my software RAID1 (mirror) that I created in Windows to show up in Ubuntu. I have read that this is possible here using mdadm, but I'm ...
1
vote
1answer
998 views

degraded mdadm RAID5 array

My /dev/md0 array just died last night. I got this email This is an automatically generated mail message from mdadm running on A Fail event had been detected on md device /dev/md0. It ...
1
vote
1answer
637 views

CentOS - mdadm raid1 drive won't mount to default location

I'm running CentOS 5.5, the system, boot, swap, etc. is all on /dev/sda and I have two identical single-partition drives /dev/sdb1 /dev/sdc1 that are configured in RAID1 (using mdadm). It was working ...
9
votes
3answers
16k views

How-to change the name of an MD device (mdadm)

Here is the output from mdadm -Esv: ARRAY /dev/md127 level=raid0 num-devices=2 UUID=d89d9d45:9a420812:c44c77eb:7ee19756 devices=/dev/sdb8,/dev/sda8 This is a v0.90 array. The question is as ...
1
vote
1answer
797 views

Recover Linux software RAID5 array after server upgrade

I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
2
votes
1answer
283 views

Recover from failed recovery of software RAID5 failure

I have the pleasure ;-) to have been handed the task to try to get data off a server that had a RAID5 array problem and a failed attempt to recover it. Background: the computer in question is some ...
6
votes
3answers
4k views

Raid1 with active and spare partition

I am having the following problem with a RAID1 software raid partition on my Ubuntu system (10.04 LTS, 2.6.32-24-server in case it matters). One of my disks (sdb5) reported I/O errors and was ...
1
vote
1answer
1k views

Auto-rebuild RAID6 with MDADM

I have an openSUSE 11.3 Linux computer with 5 disks of 1TB (WD enterprise disks) in it. With mdadm I configured a RAID6 device. Now, after a lot of thorough testing, I've noticed that when the ...
0
votes
1answer
1k views

mdadm device missing

after a reboot my /dev/md0 device was missing. This is a RAID-1 array from two partitions of two harddrives. On each of the harddrives is another partition, which together belong to dev/md1. However, ...
1
vote
1answer
337 views

Paritions “appear” in my raid 1 array after reboot, and the partitions in the array have changed names

I am moving my Ubuntu install to lvm over raid 1. I created the arrays with only 1 disk initially, planning to add the second disk later. I got the files moved and the system booted up succesfully on ...
19
votes
8answers
71k views

How to get an inactive RAID device working again?

After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it. * Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0. # mount ...