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Questions tagged [mdadm]

A linux utility used to manage software RAID devices.

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Software MDADM RAID 5 - Inactive MD0 showing

I have Linux (Crunchbang 8.10) set up with 3x1TB Hard drives set up as software RAID5. It has recently suddenly stopped working. cat /proc/mdstat shows the following: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]…
iali
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Linux raid with a flaky usb drives (bus?)

I have a raid with two USB drives in a mirroring setup. It works pretty well, but the USB bus is pretty flaky and about once a week, for reasons unknown to me (apparently nothing relevant in the logs) a drive will disappear and come back on a…
jettero
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ubuntu raid problem - different arrays configured, defferent mounted

I've just finished setting up my new ubuntu server 10.4 machine, with 2x500 GB SATA disks - which I intended to configure in raid1; specifically, that's what I did during the instalation process: partitions: disk 1 - sda: sda1 - 500mb primary sda2…
donwito
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mdadm raid1 fails to resync

I'm trying to solve this problem I'm having with an mdadm raid1. I have an ubuntu 9.04 server running on a software 2-drive raid1 with mdadm. Yesterday, one of the drives failed, and so I replaced it with a brand new drive of the same size. I…
0x6A75616E
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mdadm cron job sends email that cron has run

I've got an Ubuntu 8.04 server using mdadm to create several RAID1 arrays. I created /etc/cron.hourly/mdadm as follows: #! /bin/sh set -e mdadm --monitor /dev/md0 /dev/md3 /dev/md4 --oneshot (Yes, the array numbers are not sequential, and I'm not…
Andrew
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raid 5 creation (using mdadm) lots of read/writes on creation: is this normal?

I created a software raid 5 disk using: mdadm -C /dev/md2 -l5 -n4 /dev/sd[i-l] at the same time I'm using dstat to see io-activity: dstat -c -d -D total,sda1,md2,sdi,sdj,sdk,sdl -l -m -n and notice that disks sd[i-k] are all read from and sdl is…
Gbrits
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Mdadm Raid5 kicking non-fresh drive from array

I set up a mdadm raid5 with 3 drives initially: sdc1, sdd1, sde1. They array creation was successful without issues. Later I decided to extend the array using one more drive. After proper partitioning, I added the device sdf1 to the array and…
ricardo3889
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mdadm copy superblock from drive to drive

i have an RAID5 consisting of 7 HDDS. One Drive is only partially accessable anymore. Unfortunatly i used the create command which resetted the superblocks of the 6 healthy drives. is there a way to access a superblock backup, save it to a file and…
JJSCH
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setup Raid1 on running system

I have 2 disk sda and sdb with several partition. I have to make a raid1 of the running system. I managed to setup raid1 with md0 on root but there are 2 more partition which are mounted on /home and /var which i cannot add to raid. Below are the…
codelearner1029
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Reassign drive index number of mdadm software raid devices

My RAID 1 array has two disks as stated by # mdadm --detail /dev/md0 ... ... ... Number Major Minor RaidDevice State 5 8 32 0 active sync /dev/sdc 4 8 16 1 active sync …
razor7
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Convert MDADM RAID disk to non-raid disk

I have an existing RAID1 disk that is my boot & root drive locally. I want to convert this disk to a non-RAID disk and allow boot & root to be mounted without mdadm. What is the best way to do this?! I am having a tough time getting this…
Derek Edwards
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Cancel `md --grow` operation

I added drives to an md RAID5 array, and quickly realized that I forgot to create a partition as is best practice (something I’ve also learned from bitter experience). How can I cancel this operation and re-add them? Right now I froze the rebuild.…
Aleksandr Dubinsky
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/dev/md0 - wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error

I recently had issues with a raid filesystem I created and had some bad luck. I started creating a raid0 one one disk with the intent to expend it afterwards. I had data on two drives and had only one spare to migrate from an ntfs windows to linux…
noje89
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Temporary disconnect of HDD in RAID 0 array

I have a blade server on Rocky Linux 8 with 5 18TB WD Gold HDDs in a software RAID0 built with mdadm. I will accept all the lectures on this and change my ways if you all can help. I needed coffee while I was investigating what appeared to be an…
alchemist
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Why is existing RAID1 boot array not working in new PC

This question maybe related to this: https://askubuntu.com/questions/1347710/disappeared-raid-1-array-after-replacing-motherboard I created a software RAID1 array with 2 SSDs on an HP Z800 and configured it as my boot device. Everything worked.…
Ben
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