Questions tagged [mdadm]

a utility to administrate Linux Software RAID devices

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How can I remove RAID 1 on Ubuntu 18.04 server to reclaim storage space?

I have a server with raid1 set up, I want more memory by removing raid1 but I don't know enough to do this. Please provide commands that will allow me to delete the raid and get 2 disks separately. ...
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os-prober not finding windows on intel softraid

Background: I have a Desktop with the following drive configuration: Ubuntu 20.04 on single SSD Windows 10 on a Intel RST Raid across 2 SSDs OS's are installed in UEFI mode Problem: OS prober does ...
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mdadm RAID 0 array Devices are busy - Ubuntu 20.04

Trying to setup a mdadm RAID array but I cannot create the array. I am using command: sudo mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1p1 When I use this it ...
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Deleting files from /mnt/md0 Frees Space Unexpectedly

When I delete large files from /mnt/md0, space appears to be freed from nvme0n1 because df- h shows that the usage for the filesystem moutned on / decreases significantly. Is my md0 array set up or ...
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Can a linux raid array be cloned?

I have my system all set up on a pair of older NVMe drives and I have a new pair of PCIe 4.0 drives coming in today. My motherboard will support all four drives. Is there a way to clone the arrays, ...
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Ubuntu server install and existing RAID partitions

Ubuntu server installation with FakeRaid I use a FakeRaid on my Ubuntu system at home. This a RAID-0 containing my Steam Library and other games. My problem is that when I install Ubuntu server (base ...
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MDADM - Looking for assurance I added a drive correctly

I had a 3 disk raid 0 using mdadm and I just tried to add a disk to the array to enable me to expand the space. The command was accepted however it then reported back that there were 5 disks in the ...
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Samba crashes during multiple file transfer; need to restart samba to resume transfer. Win10 - Ubuntu 20.04.2 - Samba 4.11.6

Fresh install of Ubuntu 20.04.2 LTS + Samba 4.11.6 on an old HP PROLIANT MICROSERVER G1610T GEN8 which had run flawlessly for 6 years on Ubuntu 15.xx. This w.e. I tried to upgrade to Ubuntu 20.xx but ...
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Raid array is initiated but I'm unable to mount it

I have a NAS device (Synology Diskstation) with 2 HD mounted as Raid 1. I removed one drive from the NAS, installed it in an external USB HD case and I'm trying to mount it on my linux machine. I ...
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Is there a problem with my Ubuntu RAID array

I have an Ubuntu 18.04 server with two 1Tb drives in a software RAID1 array, configured during the OS installation process. I wanted the check the health of the array and disks this evening and am not ...
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HDD error or system hardware failure on aging home server?

I have ubuntu 20.04 desktop machine that I'm using as a home media server. I have the system installed on an SSD. There is also a Raid 5 mdadm array with 3 4TB seagate Iron Wolf Pro drives that are ...
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52 views

What's going on with mdadm --examine here?

I'm trying to figure out why my PCIe attached nvme drives don't seem to be being recognized properly and assembling into the RAID as I expected. Doing some trouble shooting and looking around this ...
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What is the best way to set up a RAID 0 for an Ubuntu-based linux install (AHCI / mdadm)?

I'm trying to install an Ubuntu-based linux on a RAID 0, consisting of 2 NVMe drives. I'm getting quite confused with the information available online, some sources say only AHCI support trim command, ...
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How to migrate from mdadm (RAID 1) from 2 HDD's to 2 SDD's

I would like to migrate a Dell PowerEdge R210 II from two HDD's (running RAID 1 via mdadm) to two SSD's of slightly larger size (512GB vs 500GB). The system currently boots using BIOS (not UEFI) ...
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Lost UUID on RAID devices after reboot

I'm looking for a bit of help trying to figure out why I can not reassemble a RAID after reboot. I have tried: sudo mdadm --assemble --scan My previous /etc/mdadm/mdadm.conf is as follows. The RAID ...
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Can an ex-RAID 1 drive (mdadm) be mounted normally?

I currently have a one-disk ext4 NAS using Ubuntu Server 18.04 on my LAN to which I am considering attaching another identical disk in RAID 1 using mdadm. But I am wondering if, following a catastophe ...
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Raid 0 in Ubuntu desktop with mdadm

I am a newbie in configuring a storage system, so please feel free to state the obvious in your reply. Currently i am running Ubuntu 20.04.2 and I have a single 500Go SSD and I want to add another ...
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Read RAID array from partitions within ISO files and disks

How can I assemble a RAID5 array using mdadm, if my disks are actually partitions, and some of them are image files, rather than actual disks? I'm using Ubuntu 18.04 I have an old RAID 5 array that I ...
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mdadm raid5 recovery after filesystem corrupt

TL,DR; I might've messed up huge, I need someone's help who knows mdadm better than I. I can provide any sort of data, but this crazy long story will get you up to par, if you care to read it. I'...
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!! Solved !! Why does mdadm --create start recovery

!! Solved !! Hi there i'm trying to create a md software RAID5. First some info Distributor ID: Ubuntu Description: Ubuntu 20.10 Release: 20.10 Codename: groovy mdadm - v4.1 - 2018-10-01 The ...
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mdadm raid 5 pairity check control / new behaviors in Ubuntu 20.04

It looks like there's been some changes in when mdadm does parity checks and how it is controlled. It used to start the first Sunday of the month at about 1AM and was started by a cron entry. Now it ...
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Intel RAID 1 md124 and md126 not visible after reinstall

MB: ASUS X99-E-10G WS I previously had Ubuntu installed with mdadm installed on it, and I had an Intel RAID 1 set up with two Seagate ST8000DM0004's. The drives in this raid showed up in Ubuntu and ...
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174 views

Linux raid autodetect (fd) or Linux RAID (ee)

Ubuntu 20.04 up to date. I'm trying to setup a raid with 8TB disks and I'm following this guide using fdisk https://www.linuxbabe.com/linux-server/linux-software-raid-1-setup I can't change partition ...
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MegaRaid LSI raid to mdadm

My MegaRaid controller died and I'm trying to use md to mount the raid, but can't seem to figure it out. sudo mdadm --detail --scan returns: ARRAY /dev/md/ddf0 metadata=ddf UUID=2acf6bbb:f1f23ebd:...
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166 views

“The backup GPT table is not on the end of the device.” error on a new RAID

I created this new mirror on Intel RST enabled motherboard via Intel controller setup, available during POST. It appears as /dev/md126. Subsequently I created partition and fs on top of the array: ...
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Help Replacing Disk in Raid Array

Before forming this question, as a disclaimer, I am no expert user, but I am also no novice. Some of the advice I am given may be easily understood, and some others (especially those who use excessive ...
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19 views

Problems with raid 5

I'm having a problem with an array. It was originally based on 3 identical disks, then I add a new one but something was wrong. So now I've an inactive raid: root@nas:/home/al# cat /proc/mdstat ...
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mdadm raid6 INACTIVE

Two days ago, RAID6 told me, that one of the drives is faulty. Not a problem. Took the new one, replaced, started rebuilding. After like 15min. or so, everything crashed. MDADM showed that 3 drives ...
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RAID 1 Disks are Both Blank

I have Ubuntu Server running on a Raspberry Pi 4 with 2 2TB hard disks that were in a RAID 1 array. After powering down the server to move some cables and replace one of the adapters, my RAID array ...
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104 views

Permanently deleting an mdadm array created during OS installation

I have an Ubuntu 20.04.1 server with 6 NVMe SSDs that were configured as raid10 mdadm array md0. In order to troubleshoot my Graphite filesystem corruption problem, I'm trying to use ZFS instead of ...
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ls: reading directory '.': Input/output error

The computer was working fine until this morning I found out the hdd (two 4TB disk in RAID0 made with mdadm) had Input/output error. Upon lsing the directory, I was met with: ls: reading directory '.':...
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177 views

mdadm checking RAID 5 array after each restart

system info: Ubuntu 20.04 Software raid 5 (added 3rd HDD and converted from raid 1). FS is Ext4 over LUKS. I saw a system slowdown after a restart, so I checked the array status via proc/mdstat, and ...
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What's causing my “No space for directory leaf checksum” error?

I have a new Ubuntu 20.04 HPE DL360 Gen10 server to replace an old 16.04 HPE DL360 Gen9 server for running Graphite and Grafana. The old server had a 2 TB hardware RAID10 (4 x 1 TB SSDs) ext4 ...
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52 views

Can I partition a RAID 5 storage?

My aim is to setup RAID 5 on three x 10 TB hard disks that I have. My OS - Ubuntu 18.04 is already installed on a different SSD separate from these drives. My question is, Can I partition the combined ...
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How to show mounted mdadm RAID0 in nautilus?

Under Ubuntu 20.04, I have created a RAID0 with 5 drives. It is mounted, I changed owner to myself so I can write into it, and when I reboot I can access it from the terminal. Yet, it does not show ...
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Previous drives that were part of RAID1 (md0) are not able to mount/read

I'm running Ubuntu 20.04.1 LTS. I have 2 drives that were mirrored in a RAID1 setup, then I moved my main Ubuntu drive and 2 mirrored drives into a newer computer (HP Z230) with faster CPU and more ...
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After Reboot Ubuntu 20.04 - RAID10 goes INACTIVE

I installed RAID 10 on a fresh Ubuntu 20.04 By the Following commands: 1. mdadm --examine /dev/sdc /dev/sdd /dev/sde /dev/sdf 2. parted /dev/sdc x. select /dev/sdd x. select /dev/sde x. select /dev/...
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Moved main HD and 2 RAID1 Drives into new computer… created problems!

First off, I'm really not great at code or anything, I honestly fumbled my way through this original Ubuntu build. I've got an Ubuntu 20.04.1 LTS setup, originally I was using an old HP 6005 SFF (mind ...
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I Seem to have lost all RAID data after moving RAID to new ubuntu 20.04 machine

Overview I had a working raid1 array (2x2TB) in and ubuntu/mate 18.04 machine I have moved it several time with no problems I moved the raid array into a new machine running ubuntu 20.04 (this machine ...
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I think I killed my raid0 setup

I had a raid0 (two hard drives) set up for my nas but after taking it apart (changing case and power supply) the raid0 (md0) is not being detected) but yet both drives are as separate entities. I was ...
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230 views

How to change RAID 1 to RAID 0 on a server

I have bought a dedicated server from OVH and it has two disks, but I can only use one disk since (seems like) the other one is to mirror the data of the first. I have searched tutorials on how to ...
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RAID Ubuntu storage help

and thanks in advance for any help. New to linux obviously. My goal here was to create a NVR server for cameras and use a relatively cheap software to manage them. Also will use this as the Monitor ...
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Can mdadm actually cause problems to the disks that are members of a Raid 0 array?

I have read many warnings about the dangers of Raid 0 arrays and how a possible failure of one of the disks will lead to a total loss of data. That's totally understandable. I've also read though that ...
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115 views

mdadm RAID benchmark with `fio` fast but Gnome Disks extremely slow

I've got a software RAID5 array consisting of four 8TB disks assembled using mdadm. When I try to measure write performance using fio with the command fio --name TEST --eta-newline=5s --filename=fio-...
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111 views

How to find disk serial on raid1 system on Ubuntu 18.04

I have a remote server with SSD RAID1 disks. I do not find the serial of the disk with error. Any help here? Thanx! I have this error message: A DegradedArray event had been detected on md device /dev/...
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Can I combine physical drives into a single volume for use as part of a RAID?

I have a home media server that currently has 4 4TB drives in a Raid5 using mdadm. This gives me 12TB of space currently and it has almost run out. I want to add more space but would like to use ...
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139 views

How to safely create software RAID 1 in Ubuntu Server 20.04

a week ago installed Ubuntu Server 20.04 on laptop as dev server and decided to enable software RAID1 on it. Already put the second hdd into it and decided before going to break something to try this ...
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Unable to configure RAID 0 on my ubuntu machine

I am new to the RAID concept, sorry if this is a redundant question. lsblk output: sda 8:0 0 931.5G 0 disk ├─sda1 8:1 0 220.6G 0 part ├─sda2 8:2 0 19.1G 0 part / └─sda3 8:3 ...
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Ubuntu 20 5.4.0-40-generic STUCK on updating Kernel

I'm running Ubuntu 20 We ran apt-get upgrade and its stuck on Upgrading kernel: Setting up linux-firmware (1.187.3) ... update-initramfs: Generating /boot/initrd.img-5.4.0-40-generic This is "ps ...
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Ubuntu 16.04.6 LTS - MD Volume Not Found after update to 4.4.0-190-generic kernel

I just upgraded the kernel from Ubuntu 16.04.6 LTS, kernel 4.4.0-189-generic to Ubuntu 16.04.6 LTS, kernel 4.4.0-190-generic and now I cannot boot as my software raid (MD) volume is not found. I did ...

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