All Questions
198
questions
2
votes
1
answer
4k
views
Mounting a raid1 device - no suitable drives found
I'm having some problems with my disks; long story.. but right now I'm trying to mount a device that was part of a 2-disk raid1. For that, I tried to assemble it into a new array, but...
% mdadm -Av /...
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- 1
1
vote
0
answers
50
views
New NAS: Enhancing MDADM against long-term bitrot and random errors [closed]
For the last 15 years I was running MDADM(Raid6)+EXT4 under Ubuntu Server on smaller arrays <25Tb. Typically, all my arrays grow over the years, so I was starting with 4-5 drives and ending around ...
- 48
0
votes
1
answer
46
views
resize2fs wont grow an mdadm array (raid6, lvm, ext4)
I've decided to grow my raid6 array:
- from: 7x 2TB drives (giving usable space of ~9TB in ext4/raid6)
- to: 7x 4TB drives (giving usable space of ~18TB in ext4/raid6)
I have replaced all seven ...
- 18.2k
2
votes
0
answers
110
views
Mounting External Intel Raid Device on Linux Failing, No Suitable Superblock and Read Past End
I have a hard-disk from a dead machine that I'm trying to mount on my Linux machine. For reference, I'm using Fedora 39 and mdadm v4.2. First, I tried just mounting it, correctly showing it's a RAID ...
- 221
0
votes
0
answers
64
views
Degraded four-drive RAID 5 with missing superblock on single drive
I'll start with the question: Based on the following information, is there a mdadm command I can make in the readyNAS to reassemble all four drives in the raid 5 in a working state where I can pull ...
- 1
6
votes
4
answers
4k
views
Linux software RAID robustness for RAID1 vs other RAID levels
I have a RAID5 array running and now also a raid1 that I set up yesterday. Since RAID5 calculates parity it should be able to catch silent data corruption on one disk. However for RAID1 the disks are ...
- 1,967
0
votes
0
answers
16
views
USB disk on a VBox on RAID was repartitioned
I have an Ubuntu on a VBox on Windows 10 Pro. The Ubuntu had a Raid 1+0 with 2 external USB disks. Suddenly, when I restarted the server, both disks got repartitioned with these: PARTLABEL="...
- 334
2
votes
1
answer
180
views
How to recover a RAID 5 after deleting the partition table and fstab?
I have a RAID5 set up for my storage drives on my Nixos 23.11 machine. I followed this guide to set up the RAID (and I followed it very closely).
I have just reinstalled Linux on my boot drive (...
- 41
0
votes
0
answers
15
views
Using mdadm to perform no-downtime backupd
I have a server running Ubuntu 23.10. It contains several RAID 1 arrays created using mdadm. One of these holds the virtual machine disk images of my web-servers. Currently, to backup these images, I ...
- 1
0
votes
0
answers
53
views
Unable to access data on Intel "fake RAID" after failed Ubuntu update
Recently I did an update of my Ubuntu, it seems to work at first but after restart it shows:
kernell ofset relocation range kernel panic not syncing: VFS
I try to use different older kernel from Grub ...
- 101
0
votes
1
answer
253
views
mdadm grow fails with "mdadm: Cannot add bitmap while array is resyncing or reshaping etc."
We have a RAID-1 setup. We changed the old 1TB disks for 3.7TB disks. The disk changes worked without a problem, the disks are in sync. We did have to change the partition type from MBR to GPT, but ...
- 17
0
votes
1
answer
151
views
UEFI Intel RST RAID issue, can it be solved with MDADM?
I had two disks running on RAID0 on a Gigabyte GA-X38-DQ6. They contained a Windows installation, although not used at all as I was running linux from another SSD disk.
They were running on the Intel ...
32
votes
11
answers
61k
views
Simple mdadm RAID 1 not activating spare
I had created two 2TB HDD partitions (/dev/sdb1 and /dev/sdc1) in a RAID 1 array called /dev/md0 using mdadm on Ubuntu 12.04 LTS Precise Pangolin.
The command sudo mdadm --detail /dev/md0 used to ...
- 101
2
votes
1
answer
317
views
Read data from a raid1 disk, superblocks erased
I have a disk that used to be inside my qnap NAS (it was in raid1 with another disk, which I still have). The NAS died and I mounted the disk on my ubuntu machine using mdadm to create the raid array ...
- 560
1
vote
1
answer
3k
views
mdadm device missing
After a reboot my /dev/md0 device was missing. This is a RAID-1 array from two partitions of two harddrives. On each of the harddrives is another partition, which together belong to dev/md1. However, ...
- 56k