Questions tagged [raid]

RAID stands for redundant array of independent disks, and allows for disks to be linked in various ways. Common RAID setups in Ubuntu are a hardware RAID, FakeRAID and software RAID.

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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 ...
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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/...
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Size of filesystem doesn't match up with multiple SSDs

I have a new box with two 512GB NVMe SSDs. The output of lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 61.9M 1 loop /snap/core20/1434 loop1 7:1 0 67.8M ...
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Install Ubuntu 22.04 desktop with Software RAID(1) -> LUKS -> LVM on machine with UEFI

I try made a super-duper hiper-secure configuration with: Software RAID(1) -> LUKS -> LVM To do this I have 2 physical SSD drive (Crucial MX500). I'll following along instructions available here:...
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Raid Level 1 md1 mounted to root has less memory than md2. I want to give root (md1) more storage(free space). Is this possible or necessary?

Raid Level 1 md1 mounted to root has less memory than md2. I want to give root (md1) more storage(free space). Is this possible or necessary, to expand the size of md1 in order to get more memory ...
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System boots to initramfs after upgrade from 21.10 to 22.04

I upgraded to jammy and now I have problems. I have two 500G SSDs (sda/sdb) in RAID1 mirror in ASUS BIOS ("promise" RAID, I suspect) and sdc is a physical LSI RAID controller. It's a UEFI ...
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Create Cinder Backend with MicroStack

Not sure if this is the correct place to be positing this, but here it goes… I am new to both OpenStack and MicroStack. I have my first MicroStack cluster initialized and running but was a little ...
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Erase logical volume and use freed space to enlarge existing volume on RAID

I am working remotely in command line and need to remove old unused volume and use this freed space to enlarge the volume holding /home. I am not sure of the terminology so see relevant lsblk below. ...
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Raid0 array destroyed because of one HDD not reconized

sorry for my bad english ! I've done a big mistake, i use f3probe --destructive not on my sd card but on a disk in a raid0 array, . now i can't mount the array, because no partition table are found on ...
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How to setup mdadm RAID1 with in use disks correctly

According to this Guide, I am trying to set up a Raid 1 retrospectively under Ubuntu Server. Only after the steps: mount /dev/md1 /mnt mkdir /mnt/boot mount /dev/md0 /mnt/boot and one lsblk with ...
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How create mdadm RAID1 without lossing data

I have a 4TB hard drive, I mounted that hard drive in /var, to be able to store and make backups of the production server, and I came up with the idea of creating a RAID 1, for that I requested ...
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Cannot Detect RAID_1 Failed Drive From Live USB

I'm new to the server world, so I don't quite understand how it works. I have Dell PowerEdge R730, it has RAID_1 configuration, and out of nowhere both of the drives failed. Im trying ro recover the ...
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Ubuntu Server install on RAID0

Trying to setup RAID0 on a server 20.04. I have 2 new NVME drives and the ubuntu installer is only showing 1 drive as multipath. If I use shell and run lsblk then I see both drives. The desktop ...
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Recovering folder deleted sudenly / recovering ssd raid 0+1 hp

Server HP G9 - DL 360 **Ram :**256 GB Ram SSD : 4 SSD 500Gig Samsung EVO (All Samsung ssd hard is configured to Raid 0+1) https://www.samsung.com/uk/support/model/MZ-76E500B/EU/ **Sas :**1 TB Sas HP ...
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How to find out what type of RAID was used and possibly mounting the drive

I found a hard drive that I used in a file server years ago using Ubuntu with Samba. I would like to see if anything on the drive is recoverable. There were 2 drives and one got wiped. I don't ...
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Putting /home in a different drive than root drive

I have SSD, and HDD, on a new computer that I am preparing installing Ubutu 20.04 on. Because the SSD, and HDD, will be RAIDed, and both will be natively encrypted, I am doing a manual install. I have ...
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BIOS raid restoration (after mdadm raid)?

I upgraded Ubuntu and RAID array disappeared. I tried to assemble RAID0 with mdadm in Ubuntu terminal. (Sadly,) I ended up running the below: sudo mdadm --create --verbose /dev/md0 --level=0 --raid-...
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Ubuntu Root on ZFS

These questions are in regard to this article: https://openzfs.github.io/openzfs-docs/Getting%20Started/Ubuntu/Ubuntu%2020.04%20Root%20on%20ZFS.html I intend to follow those instructions using an ...
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Raid0 disappeared after ubuntu upgrade. How to recover it?

I may need a lot of help here.. After upgrading ubuntu from 16.04 ->18.04 ->20.04, my raid0 array disappeared. I wish to reassemble the raid array. While working on this, I might have committed ...
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mdadm RAID array stop and restart

I've 24 disks connected from a target to my Ubuntu . I've created a RAID 6 array from above 24 disks. Now to stop the array and restart it , I'm following below steps: mdadm --stop device mdadm --...
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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 ...
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Missing md2 partition in raid

today I restarted my machine and it is not booting, so I launched a recovery image and ran lsblk and this is the output: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 3G ...
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Installing with Dual boot, raid 0, 3 drives

I’ve searched but don’t see my issue covered which is a variation of the dual boot Ubuntu install issues many seem to have. The way I see it, mine should be more straight forward but that doesn’t seem ...
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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, ...
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Create an active backup / Mirror of a windows drive on a Ubuntu Sotware Raid

I have a 8TB drive on Windows that I use for data storage. I also have a 8TB Raid 1 on an Ubuntu machine (Home bare-metal). Id ideally like to have Ubuntu (or Windows) actively backup what is on the ...
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Ubuntu 20.04 install error possibly related to RAID

Trying to install Ubuntu server 20.04.04 on a remote server. I don't have on site access so the installer is mounted from a USB stick and the install is happening over SSH. I made a custom install ...
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Ubuntu 20.04.3 on Dell R-620 with PERC H710 RAID controller installation reports error: attempt read-write outside of disk `hd0`

I am trying to optimize the reliability, HD usage efficiency, and HD performance of a fresh install of Ubuntu 20.04.3 LTS on a Dell R-620 which has six 2 TB HD in a RAID-5 drive created and managed by ...
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How to use dd to clone single drive to raid1?

Running dd if=/dev/sda of=/dev/md126 is taking some time so it seems like it's working but I am not sure what else may need to be done after to make the system bootable. When trying to mount /dev/...
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How do I rebuild/reconnect encrypted RAID array on new computer?

I am looking for help to have a previously built/functioning 2 HDD RAID1 array (encrypted with LUKS and containing two partitions) mount/decrypt at boot on a new rig. I'm having trouble finding ...
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ZFS Harddrive Errors - Degraded Pool

I know there are some similar questions out there, but there is too much that is new to me to want continue sorting through my trouble shooting a problem alone. I have new disks. They have less than ...
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How to fix broken OS installation in a RAID 0 array?

I had Ubuntu server 16.04 installed to run a media server in my house in a RAID 0 array (3 hdd). After upgrading to Ubuntu 20.04 many problems occured in the OS and some ofthe features I installed ...
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Ubuntu Server 20.04 RAID 5 disk space

I have installed Ubuntu Server 20.04.3 on a HP Rack server with Raid 5. The hardware raid pgm indicates 1.1tb of space. Ubuntu DF command reports only 98gb. Filesystem Size ...
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Do I need to set up raid to install ubuntu server 20.04

I have an old desk power Edge sc1430 that I'm trying to install the server software onto. But it does not see any of my discs when doing block probing. However if I go into the terminal I can see all ...
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Install Ubuntu 20.04.3 in RAID0 on two SSDs

I’m trying to install Ubuntu Server 20.04.3 on 2 X Samsung Pro 980 2TB in RAID0. I have YouTubed and googled a lot but simply can’t make it work. Option A: When I create the partitions: /, SWAP and ...
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Permission Problem with RAID1 device

I'm experiencing some trouble with an home server (Ubuntu 20.04.3) that I have put on. My configuration: 1 Software RAID1 (mdadm) that is mounted via fstab to /media/altocasa/NetDisk1 I have also ...
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Creating mdadm RAID1 boot/OS and RAID6 storage arrays with shared hot spares in Ubuntu 20.04

I'd like to install ubuntu server 20.04 with a few SSDs in a RAID1 for the boot/OS drive, and a handful more SSDs in RAID6 for storage, then finally have 2 hot spare SSDs which would be able to be ...
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Ubuntu 20.04 preseed - Allow interactive drive configuration

I am trying to modify and existing preseed file that a predecessor created to allow the drive configuration utility to be used to create a raid volume for the root directory. Either that or i need to ...
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Adding Storage space to RAID1 setup

Currently I have an Ubuntu 18.04.6 LTS server with 2 6TB HDs setup in RAID1 like so: ~$ cat /proc/mdstat Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] md0 : ...
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How much swap when striping accross two disks and hibernating

When a computer has two hard drives it might make sense to have two swap partitions, one on each disk - thus the swap is automatically stripped and thus much faster than otherwise. When configuring a ...
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Installed ubuntu on Windows 11 RAID 1, can't boot, it goes into BIOS

I've RAID 1 on Windows, it's intel RST. I installed ubuntu on it in dual boot mode. Installation went through but system doesn't boot into any OS and it keeps going into BIOS. I'm assuming boot record ...
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How to remount a RAID 0 after a fresh install?

My server that holds all my music, tv shows, etc. stopped booting and after failing to get it running myself, I took it to a place and they reinstalled ubuntu on a different drive. I have 2 other ...
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Does that look right? (Raid 1) How do I proceed?

So I did a raid 1 (with 2 HDDs) in the installation of ubuntu server to save my pictures etc on. How shall I proceed? Can I mount by doing a command like sudo mount /dev/md0 (or do i have to mount /...
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RAID designation - how to use "name" istead of "md"?

Using "mdadm" to create RAID I specify "mdxx". For unknown reasons it changed to "qt-desktop:xx". That is legal , but how do I use it ? sudo mount /dev/sdf27 /md/qt-...
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Why mdadm RAID does **NOT** boost reading performance?

I add 2 NVMe SSDs(Samsung 980 Pro) into my PC as tablespace of postgresql, while the OS boots from another SATA SSD(Samsung 860 EVO) as before. These 2 nvme m.2 SSDs have a basic performace about ...
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RAID array says "critical medium error" but smartctl says disk is healthy - what to do next?

I have a RAID-1 array of SSDs (Samsung 970 EVO Plus), and errors are showing up in /var/log/syslog, but smartctl reports that the drive is healthy. I've done a bunch of diagnosis (below) and I'm ...
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How to drop raid1 and combine two disks to one

Goal In the remote server, it comes with 2 x 2TB disk with RAID-1, however, I have already filled the disk with data and I would like to remove the RAID-1 scheme and make it ~4TB in single mountpoint ...
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How do I properly install GRUB on a RAID 0 created with mdadm?

How do I properly install GRUB on a mdadm RAID 0? I try to install grub and it doesnt properly install, like /etc/default/grub is missing.
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How to mount /tmp to another directory to increase memory

My /tmp directory is now at capacity and I want to increase the available memory: df -h /tmp Filesystem Size Used Avail Use% Mounted on /dev/nvme0n1p3 59G 54G 2.1G 97% / To try and do ...
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Install Ubuntu 20.04 Focal Fossa with RAID 1 on two devices no UEFI [Solved]

The methods seen on this forum DO NOT WORK for me. They talk about create swap partitions that are no longer needed. BTW I have a solution which I will immediately answer but welcome others.
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ZFS - New pool doesn't survive reboot

I'm in the process of "replacing" my mdadm raid5 array with a raidz2 array with ZFS on my Ubuntu 20.04 home server. But for some reason, after each reboot my zpool and datasets can't be ...
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