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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Can I combine raid1 and dup BTRFS profiles?
In essence I want to have two mirror devices but also two copies of the data on each device.
Will something like this work and behave as I expect?
btrfs balance start convert=raid1,dup,soft /mnt/sdxn/
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mdadm --monitor --program option not working
I am trying to make mdadm call into a simple bash script which writes a message in the kernel log in case of a state change.
I am running on a VM (qemu). The VM is running debian 12.5, and kernel ...
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mdadm: Cannot get array info for /dev/md127
i have one problem.
I created RAID1 with two discs, then i simulated failure of one of the discs. It was sdb1.
I restared the VM with one disc working in RAID array.
Then i added new fresh disc to add ...
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How to merge two directories with failover?
Lets say I have two devices:
/dev/sda1 mounted to / (system partition)
/dev/sdb1 mounted to /media/data (data partition, usb device may be unplugged)
I want to merge/overlay/raid two directories ...
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Troubleshooting RAID1 unbootable disks after CMOS reset
I've been running a RAID1 setup using two Samsung 970 EVO 500GB NVMEs on an Asus Z390 Maximus XI Formula motherboard for the last two years. This is my home server running Ubuntu 22.04 and I chose ...
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Recovering a RAID6
We experienced a power outage last Thursday morning. Luckily the OMV server is on battery backup, so I was able to shut the server down. Once power was restored, I restarted the server and the RAID ...
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Remove a disk from a Raid1 array and use it as cold backup?
My RAID1 array is currently running with 3 disks (2x6TB and 1x3TB). I want to remove the smaller disk and wonder if it makes sense to put it in the safe as cold backup. The idea is to be able to mount ...
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Mdadm array is inactive, how to fix?
I have a RAID5 array configured with MDADM in Ubuntu 24.04 LTS. The array consists of five 8TB drives, and there have been no changes to it recently.
Today I noticed that the array is not accessible.
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btrfs data integrity checksum under mdadm raid
I found several places suggesting to use btrfs under mdraid (mdadm) or LVM Raid. But nobody expands on how that works when you have data checksum issues!
My main concern of not using btrfs native raid,...
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Will my system be any faster or slower with this LVM mirroring scheme?
I usually boot my system from a single 250G M.2 NVMe SSD (PCIe 3.0 x4). I also have a 240G SATA SSD and a 640G SATA 7200rpm HDD that I currently use for ad hoc backup. The latter will be replaced with ...
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Failed to umount directory from my RAID1 device (device busy)
I have a system that has 1x SSD and 2x 4TB HDD working under software RAID1. (I'm currently upgrading from Linux Mint 20 to 22, another topic regarding that issue)
On my RAID1 I have LUKS encrypted ...
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Rebuilding RAID1 with Luks after system reinstall
My current Linux Mint 20.3 is soon running out of support, so I figured it's time to install a fresh Linux Mint 22. Currently I have mdadm running two 4TB drives on RAID1 with LUKS. It's been very ...
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Accidentally Partially Removed RAID 1 Mount Point. Is My RAID Okay?
I accidentally ran sudo rm -r on my RAID 1 mount point. I immediately realized my error, panicked, and hit CTRL+C to cancel. Some damage was already done. The lost+found directory and some of my data ...
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How can I remove raid from my system? [duplicate]
I want to remove raid from my system as I am low on storage and I want to recover the second disk.
How can I recover the second disk, I tried but to no avail, here is my current state :
root@miirabox ~...
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Busy Disks and Mystery Removed Devices
I was a fool and built this mdadm raid5 targeting the device names. Yes, the ones that get randomly assigned at boot. It lasted a few months but is now in a quite odd state, with mdadm --detail ...
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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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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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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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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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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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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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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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raid 5 mdadm replace with read errors
I have a software RAID 5 with 3 disks.
For a few days, sda has been giving errors, and today the new disk arrived.
I launched mdadm --replace and the process started correctly, but due to read errors ...
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Accidentally used fdisk on mdadm RAID1 array, can I recover my data?
I installed a new disk today and was prepping it, before realizing that I'd done my "prep" work on an existing RAID1 array!! I'd LOVE to be able to recovered if possible.
My array was ...
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Why are raid modules always loaded?
This is driving me seriously crazy:
$ doas lsmod | fgrep raid | fgrep ' 0'
raid10 73728 0
raid456 192512 0
raid1 57344 0
raid0 24576 ...
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