Questions tagged [mdadm]
a utility to administrate Linux Software RAID devices
493
questions
-2
votes
0
answers
29
views
I need to create a RAID 1 using mdadm and the boot drive but it will not let me use the boot drive
I want to create a RAID 1 with 3 drives and use one as a spare. I installed Ubuntu on sda, but it won't let me create a RAID using sda and sdb with sdc as a spare drive.
How to create RAID 1 using ...
0
votes
0
answers
26
views
How do I get my RAID array back and mounted after reboot
I had created a raid-1 array for two drives (sde and sdf) using the normal mdadm process and had created it under md1 and mounted it to /mnt/storage. After a reboot md1 no longer exists. My /mnt/plex ...
- 1
0
votes
0
answers
35
views
mdadm RAID10 device ordering not sequential
After a power outage one of the drives in my two RAID10s stopped working and put the arrays into 'degraded' state. The drive had two partitions, one which I think was for a swap raid and the other was ...
- 11
0
votes
1
answer
88
views
Problem with MDADM / ZFS
Just reinstalled Kubuntu version 22 (was trying a 20=>22 LTS support upgrade and it all went badly wrong.)
I'm now encountering problems getting my disk arrays working again. Couldn't remember the ...
0
votes
0
answers
31
views
md RAID spare disk partition has another partition?
I recently had a drive fail in my RAID 5 array with 3 disks and 1 spare. The spare was used automatically. All seems to be working OK.
I then added a new disk as the new spare like this, where sdb was ...
- 861
0
votes
0
answers
30
views
Mixed HDD sized using Raid5 and mdadm
I currently have three 4TB HDDs in a raid 5 array using mdadm on Ubuntu 23.04. I only have 2 HDD open slots left. I am thinking about adding two 18TB HDD to my PC. Then combing the three 4 TB ...
- 70
0
votes
1
answer
35
views
How do I get my original RAID setup running again?
I was trying to upgrade my raid 5 to larger drives. I was following a guide I found at:
https://rabexc.org/posts/mdadm-replace
But I could tell something was wrong before I added the larger drive. ...
0
votes
0
answers
45
views
mdadm check raid1 - does it even make sense?
what does a raid1 check actually do?
I have a simple setup, two drives as mdadm raid1 (Ubuntu 20.04). I run a check and it says everything OK. I changed one byte on one of the physical drives using a ...
- 1
1
vote
0
answers
36
views
Repair a Ubuntu server installation after power fluctuation
I have an ubuntu server that includes a 256GB SSD as the boot device and 3 6TB SATA HDDs as a mdadm software RAID5 array.
While it was up and running we had an electrical service interruption that ...
- 11
0
votes
0
answers
50
views
Reload raid at Ubuntu
I use Ubuntu with one big Mdadm (raid with two big disks) but: I've got new disk with OS (Ubuntu of course). I'm trying to reload my Mdadm. Without success.
# cat /proc/mdstat
Personalities : [raid0] [...
- 1
1
vote
1
answer
117
views
Will gdisk or sgdisk commands delete my data? (mdadm e-mail alert)
I currently try to fix my mdadm /dev/md0 raid5 partition. I was informed via e-mail notification from mdadm e-mail alerts that there is a fail event and a DegradedArray event. I found this as a ...
- 13
0
votes
0
answers
50
views
Repeated corruption issues after expanding Raid6
I have a Raid6 array that has been functioning perfectly well for the past several years, but out of a desire to keep path names organized I expanded the array to include 2 additional devices. While ...
- 1
0
votes
1
answer
148
views
Fresh install of Ubuntu Server - Will raid (MDADM) be detected without losing data?
hoping you can help me. My server's current boot drive appears to be dead. I can't boot. Internally i have four drives. The last three were set up as raid 5 with mdadm. The drive in slot 1 was just a ...
0
votes
0
answers
48
views
Access Windows Software RAID 5?
Moving to Ubuntu, running 22.04.2 LTS. Previously I had Windows 10 installed and created a software RAID 5 (or fake-RAID) following these steps: https://recoverhdd.com/blog/creating-software-raid-in-...
-1
votes
1
answer
73
views
Dual boot PC using Intel RST Raid
Has anyone been successful accessing (read and write) an Intel RST raid array from both Windows and Ubuntu on a dual boot PC? I have a single PC with 6 drives:
Ubuntu O/S (m2)
Windows O/S (SSD)
4 ...
- 70
0
votes
0
answers
291
views
How to install Ubuntu 22.04 Desktop with Raid 0
I have 4 identical SSD hard drives in my dektop and want to install Ubuntu 22.04 on it with a software raid 0.
I know that RAID 0 is not a good idea in terms of data security. But I want to try ...
- 1,875
1
vote
0
answers
694
views
mdadm: error opening /dev/md?*:
I have a Ubuntu 22.04 LTS Jammy Jellyfish system with RAID0 and LVM on 2x 2TB hard.
After rebooting, the server ended up in initramfs:
mdadm: No devices listed in conf file were found.
mdadm: error ...
- 11
1
vote
1
answer
459
views
Unable to add new Disk to MDADM Raid: Failed to write metadata
When I try to add a new disk to mdadm, I am getting back an error:
sudo mdadm --add /dev/md0 /dev/sdd --verbose
mdadm: Failed to write metadata to /dev/sdd
Is this a problem with my setup or ...
- 11
0
votes
0
answers
45
views
Disk failed and other removed of raid
I have "or I had :(" a raid 1 on my ubuntu.I had problems with a disk and I try to format this disk and rebuild the raid, but then, the system stop the rebuild syncronization about 51,2%. I ...
0
votes
0
answers
167
views
mdadm -c does not set the mode and so cannot be first option
I am following the instruction here I am stuck at this line
mdadm –create /dev/md0 –level=1 –metadata=0.9 –raid-devices=2 /dev/sda1 /dev/sda2
I get the following error when I try to run it
mdadm: -c ...
- 121
0
votes
0
answers
45
views
Do I need to create a raid with the iDRAC or better with LVM?
We bought a new DELL Server (PE R7525) with AMD EPYC processors and 7 SSDs (a 1.92Tb storage space).
As I am not familiar with it I would like to ask for advice, before trying it the hard way.
Does ...
- 111
0
votes
0
answers
117
views
Replacing failed drive using mdadm
I have a test server running Ubuntu Server 22.04.
The server boots from a small SSD. When setting it up I used mdadm to create a RAID1 with two 1 TB drives for data. After a few months, one of the ...
- 1
0
votes
0
answers
46
views
Raid 1 sincronization very slow and stop
I have a Raid 1 software in Ubuntu 22.04.1.
One day I saw that I had two raids instead of one:
md0 and md127, and that both had one disk. Then I looked for which of the raid was the main one, turned ...
1
vote
1
answer
3k
views
mdadm: No arrays found in config file or automatically
On a 22.04.1 Ubuntu HP EliteBook 8570w laptop the following message is displayed a number of times when I boot it without an external disk (two partitions, data not system) plugged in:
mdadm: No ...
- 11
0
votes
0
answers
96
views
Are kernel modules (in this case: NVM Express) capable of completely disabling devices in bios on BMC-based systems, so that they seem to be vanished?
I am having an argument with one of our suppliers about a "vanished" NVMe.
Server has two NVMe, running with in raid-1 via mdadm.
syslog:
Nov 20 01:31:21 server kernel: [4638997.424557] md/...
0
votes
0
answers
29
views
MDADM 3TB RAID1 add continous 6TB RAID
I have software RAID1 with SDA + SDB (3TB). I make them via this commnad:
sudo mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sda /dev/sdb
and this mirror RAID working nice.
Now I ...
- 101
0
votes
1
answer
204
views
Is bit rot still a thing?
In short:
I have a NAS which died once and since repairing it I have a secondary backup machine which runs ubuntu.
On the ubuntu machine I used mdadm to create a raid5 storage space.
Is it fine on ...
- 158
0
votes
1
answer
73
views
Is there a way to replace a magic superblock?
Following instructions from the Internet (Without doing research first) I have blanked out the superblock on the incorrect RAID disk. Using this command;
sudo mdadm --zero-superblock /dev/sdd
Now ...
- 1
0
votes
0
answers
32
views
Is it possible to salvage what is left of a Raid array? Raid 0
So we had a 22.04 LTS update go bad on our Zoneminder server and we had a raid array for our video storage setup. All the 1.82 TiB drivers are part of that raid 0.
Picture Showing the different Drive ...
0
votes
0
answers
74
views
Mdadm commands for RAID5 array are doing nothing (Ubuntu Server 22.04)
I upgraded to ubuntu server to 22.04 from 20.04 and since then I have been unable to retrieve my RAID 5 array of 4 6tb drives.
Since trying to get it back up and running, all mdadm commands have been ...
1
vote
0
answers
561
views
How to mount a single hard disk from a former QNAP NAS with a DRBD volume under Ubuntu for data recovery?
Under Ubuntu, how to mount a single disk from a defunct QNAP NAS with a DRBD volume with a software RAID 1, for the purpose of data recovery?
QNAP NAS, which was using software RAID1:
https://www....
- 279
0
votes
0
answers
141
views
Kernel Panics Unable to mount rootfs, HELP
Hej, I need some serious help, I recently updated to 22.04.
I'm not unable to start server with out getting this error.
I upgraded from 18.04 to 20.04 with no issues so am surprised I now got this.
...
- 1
0
votes
1
answer
182
views
What is a "SparesMissing event" of a md RAID 5 array?
I have set up a Ubuntu Server 22.04 installation with a xfs filesystem on a RAID 5 /dev/md0 array. Now I get e-mail notifications from the mdadm monitoring, that a "SparesMissing" event has ...
- 61
1
vote
1
answer
218
views
I cannot boot if mdadm RAID1 array is in FSTAB
Context:
Due to a failed update from 20.04 to a 22.04, I decided to reinstall from zero the 22.04.
All things went fine, but I’m with an unbootable system if I left RAID entry at FSTAB.
I have a 2 ...
2
votes
1
answer
639
views
Ubuntu 22.04 LTS freezes during RAID recheck of multiple RAIDs
I run Ubuntu 22.04 on a machine with three software RAIDs of different size and geometry, with two of them (they are called md5 and md6) very large. Disks are shared between these arrays for certain ...
- 121
-1
votes
1
answer
328
views
How to identify a bad disk in a RAID setup on Linux?
I am observing the below error on dmesg for a RAID Array. How can i go about finding which drive in the RAID is bad
[Fri Aug 26 19:31:13 2022] EXT4-fs warning (device md0): ext4_end_bio:349: I/O error ...
- 21
0
votes
0
answers
283
views
After I installed Ubuntu 22.04 "error processing package mdadm (--configure)"
I upgraded to Ubuntu 22.04LTS from 20.04LTS.
Now it appears that the "mdadm" package is giving me hassles.
Whenever I want to look for upgrades in terminal I get this error message:
Setting ...
- 11
0
votes
1
answer
905
views
Recover data from RAID 1 member
I am trying to recover data from a drive that was part of a RAID1. First a little background.
The RAID1 consisted of 2 disks (/dev/sde and /dev/sdf). It was built ~6 years ago using mdadm. In recent ...
- 101
0
votes
1
answer
951
views
Ubuntu 22.04 server autoinstall software RAID 1
I'm working on an Ubuntu 22.04 Server autoinstall. So far it works great on a single drive.
But the next step is RAID 1... According to the cloud-init docs this is not supported as part of cloud-init ...
- 101
0
votes
0
answers
187
views
Ubuntu server destroyed my raid5 array
I have a machine running Ubuntu server at home with a 4 drive mdadm ext4 raid5 array. It was running 20.04.4 until about 3-4 weeks ago when I upgraded it to 22.04. It was running well until 5 days ...
- 1
0
votes
1
answer
373
views
RAID validation fails during Ubuntu Server 22.04 installation
I've followed Install Ubuntu 20.04 Focal Fossa with RAID 1 on two devices to set up RAID 1 during the installation of Ubuntu Server 22.04, yet installation always fails with a RAID validation error (I ...
0
votes
1
answer
126
views
How do I mount this laptop harddrive using a Live CD?
I have a Windows laptop that went wrong, and I would like to mount the harddrive using a live CD to rescue a couple of files.
I don't know how the drive is formatted or arranged but from my early ...
- 111
0
votes
2
answers
1k
views
Dual Booting Ubuntu 22.04 LTS with Raid 0 grub installation failure
I am fairly new to Ubuntu so bear with me. I recently built a PC and I wanted to run software RAID 0 on my two 1T SSDs; however, I also want to dual boot Ubuntu 22.04 alongside Windows 10. In the ...
0
votes
0
answers
48
views
Assembled two arrays with mdadm with same characteristics in the disks but ended up with slightly different sizes
I'm having problems with the size of the arrays created by mdadm.
First of all, some context. I've recently upgraded from ubuntu server 18.04 to 20.04. I'm running several raid5 arrays and a raid10. ...
0
votes
0
answers
90
views
Help with mounting mdadm array
I recently lost my NAS and am trying to recover the data in my RAID. The disks are fine, its just the NAS hardware that stopped booting and I can't get any support as its discontinued.
I attached the ...
- 1
1
vote
1
answer
196
views
How to determine which physical disk in a RAID needs to be replaced in the event of a failure?
If I have a RAID array configured (using mdadm), what's the best way of making sure I can tell which physical disk to replace in the event that one fails?
cat /proc/mdstat will tell me that (say) /dev/...
- 861
1
vote
0
answers
344
views
Problem dealing with corrupt file and mdadm
I'm running ubuntu server 20.04 with 4x 4TB drives in a RAID5 array using mdadm to provide a non-root, ext4 partition. I have a few rsync scripts to backup key folders and one of them generated an ...
- 31
2
votes
1
answer
3k
views
How can I create mdadm RAID1 without losing data?
I have a 4TB hard drive. I mounted that hard drive in /var, to be able to store and make backups of a production server, and I came up with the idea of creating a RAID 1. For that I requested another ...
- 435
1
vote
0
answers
910
views
mounting EXT4 linux raid1 array with WSL2 on a windows host machine
Two years ago I created a linux/ext4 raid1 array of two 4TB WD Red HDDs to mirror my data. At that time I was using a small ARM64 device, and used mdadm to assemble the array. That small computer was ...
0
votes
0
answers
171
views
Try to read raid 1 (mirror) disk
I have the raid 1 (mirror) disks coming from an enclosure that stopped working.
So I am trying to recover the data putting one disk into a USB adapter.
When I connect the adapter /dev adds item sdb, ...
- 1