All Questions
198
questions
1
vote
2
answers
2k
views
How to migrate mdadm RAID10 with 4 disks to RAID5?
I have a software RAID10 based on Linux’ mdadm under Debian Buster. Originally I found RAID10 had best performance. But I need more space and accept to trade some write performance for +50% space.
# ...
- 208
1
vote
2
answers
2k
views
mdadm - Raid 1 arrays do not assemble after reboot
I rebooted my server after creating 3 raid 1 arrays with mdadm, and after rebooting, systemd was spitting out errors about the raid devices timing out when trying to assemble them at boot.
I was given ...
- 2,984
-1
votes
2
answers
490
views
Unwanted, surprise device mapping causing problems with linux raid
Original title: Unwanted, surprise LVM disk mapping causing problems with linux raid
I've done linux raid on ubuntu for almost a decade but never messed with LVM although I'm vaguely aware it exists.
...
- 131
0
votes
1
answer
649
views
MDADM array rebuilding after every reboot
I have just grown my RAID-1 mirror in to a RAID-5.
After adding a 3rd disk, the array rebuilt successfully, but after restarting the array was showing as inactive, and the new disk (sde) had lost all ...
7
votes
1
answer
21k
views
Converting LVM/EXT4 to ZFS without losing data
I have a home media server with 2 x 3TB drives in it. Its currently set up using mdraid (1), LVM and EXT4. The setup was done using the ncurses Ubuntu Server installer.
Goal
Convert the setup to use ...
0
votes
2
answers
3k
views
How to restore my RAID5 after mistakenly failing one of the drives?
I have a RAID5 on Xubuntu 20.04, created with mdadm. I failed one of the three drives by mistake. The array is still working, but I get errors or responses I do not understand from my attempts to ...
- 11
1
vote
1
answer
937
views
CentOS 6 LVM RAID5, unable to activate VG / LV. "device-mapper: reload ioctl on (253:119) failed: Input/output error"
I've found myself in a complex Linux LVM-RAID5 / device-mapper problem after one temporary device failure, and one bad block encountered during that time. The logical volume can now not be activated ...
- 11
3
votes
0
answers
746
views
MD RAID 6 with XFS Periodic Kernel Panic -- Possible Kernel Bug?
This now appears to be a bug with the combination of MD and XFS after finding similar kernel panic reports elsewhere. A bug report with Ubuntu has been filed here ( https://bugs.launchpad.net/ubuntu/+...
- 101
2
votes
1
answer
2k
views
"ext4lazyinit" running since 6 days on a new RAID5 array
I know there are a lot of "ext4lazyinit" topics. But they are all about 4-6TB HDD, and poster stating that it has in the end been completed after a few hours.
On my side i have a newly ...
1
vote
2
answers
4k
views
mdadm one disk sometimes is missing after reboot
On a debian system my home directory is on a raid1 md array. After creation it worked fine for some time, but once the second drive disappeared from the array.
# cat /proc/mdstat
Personalities : [...
CommunityBot
- 1
5
votes
4
answers
15k
views
New mdadm RAID vanish after reboot
I have problems with mdadm after reboot, I can't reassemble /dev/md0 .
I work on debian wheezy.
I have done the following steps::
sudo mdadm --create --verbose /dev/md0 --level=6 --raid-devices=4 /...
32
votes
6
answers
29k
views
Does RAID1 increase performance with Linux mdadm?
I have a cheap 2-bay NAS with a 2TB HDD. To be robust against disk failure, I'm thinking of buying a second 2TB HDD and putting it in RAID1 with Linux mdadm. The file system is ext4.
Will this ...
- 101
0
votes
0
answers
173
views
Raid 10 gone - how to rebuild / find informations
Because of another task, i had to disconnect all the raid hdd's from my pc.
Shutdown -> disconnect hdd's -> boot -> shutdown -> connect hdd's -> boot -> raid completely lost.
mdadm --...
- 101
1
vote
0
answers
219
views
Is it possible to create a RAID from only partial disk?
We have a dual boot system where we install firmare on two partitions, additionally we have a data partition. We have two disks on the system and I wonder if we can create a raid for the data ...
- 121
0
votes
1
answer
185
views
raid 4 3 disks + 2 parity disks
I have a raid 0 with 3 disks and I want to be able to lose some disks without losing data.
I'm using mdadm and I already started to grow my config
Current config:
Personalities : [raid0] [linear] [...
- 465k