Questions tagged [raid]
RAID - Redundant Array of Independent Disks. A Storage technology to provide redundancy and performance, to reduce I/O bottlenecks involved in using multiple disks for large storage.
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mdadm RAID5 array became "active, FAILED" and now no longer mounts
Today my RAID5 array status from mdadm --detail /dev/md0 became active, FAILED (I have mobile notifications setup)
Most of the files were present but some were missing. This happened before and I ...
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join files/devices in linear mode together in a linux system
In order to test joining 3 files linearly on my Linux system, I do:
fallocate -l 100M file1.image
fallocate -l 150M file2.image
fallocate -l 50M file3.image
and then I run losetup:
losetup /dev/...
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How do you look into sdb1 and sdc1 to make sure data is mirrored in RAID1 using mdadm?
I've spent hours fighting mdadm to the point I had to reinstall linux and do more fighting, mostly because of write-protected issues on the drives somehow (I still don't explain it), and also ...
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mdadm RAID1 array only shows 1 drive in /proc/mdstat but --examine shows both drives as "Active" — is the array actually fine? Or has a drive failed?
I received a warning during bootup that a hard drive has failed.
My first thought was it's probably one of the two older HDDs I have configured as a software RAID1 array.
So as soon as the boot ...
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Server restarts when I run the mdadm --create command
I am not an educated computer guy, so please be gentle with me :)
I have a server I use to run plex with sonarr and radarr. I am trying to create a raid array on it. I have 10x 12TB drives and I want ...
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Does RAID always read/write an entire chunk?
Many resources on the internet contain conflicting information regarding read/write logic for RAID chunks.
This answer contains the following (seemingly conflicting) pieces of information:
A 512 KB ...
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MD Raid / LVM / BTRFS advice for homemade NAS
Context:
I'm looking to build a homemade NAS to get more flexibility (especially on the capability to add more drive) than commercial solution.
My system will start with 3 SATA SSD drive or NVME (sda, ...
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Raid 0+1 Failure Cases VS. Raid 1+0
I have heard that RAID 1+0 is more fault-reliant than RAID 0+1, because a secondary drive failure is more likely to cause data loss in RAID 0+1 than RAID 1+0.
In the above image, if "Disk 1"...
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How can I resolve this error: "mdadm: Cannot open /dev/sd*: Device or resource busy" when adding a replacement drive to RAID5?
I have a RAID5 with 4 drives, looks like this:
[root@g1016637 ~]# mdadm -D /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Wed Mar 8 16:35:25 2023
Raid Level : raid5
...
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lvm details of dm-integrity
I've added integrity checksum to my root LVM volume using lvconvert command:
~# lvconvert --raidintegrity y --raidintegritymode bitmap ...
Is there a CLI syntax to get info/details related to dm-...
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Unable to add drive to raid
I have a 3 RAID arrays on my Linux server.
root@master:~# lsblk -b
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 21474836480 0 loop
loop1 7:1 ...
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Unable to remount 5TB Hard Drive from JBOD
Unable to remount 5TB Hard Drive
Problem Description
I am using a Debian 12 Server with a RAID controller. The harddrives are all set up with their own Virtual drive in RAID0 JBOD. (so 8 Drives, each ...
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Deciding between raidz1, raidz2 and mdraid6 for JBOD Array
Have a new Linux server with a dual SAS attached 60 bay JBOD filled with 20TB (18.2 TiB) disks. I am definitely running ZFS but trying to figure out whether to use small raidz1's, bigger raidz2, or ...
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What is the problem with this hard drive? (drive errors)
I'm having trouble with a hard drive that is (supposed to be) a part of a RAID5.
Here's is the smart log:
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.15.0-107-generic] (local build)
Copyright (C) ...
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How can I find UUID for RAID array after reconnecting disks?
I set up a RAID-5 array with my disks plugged into a hub. Then I removed the hub from the setup and plugged my disks directly into the computer.
Having done so, I still see my raid device md0 appear ...
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