All Questions
198
questions
2
votes
1
answer
3k
views
mdadm shows inactive raid0 array instead of degraded raid6 after disk failure
I've been running an Ubuntu 18.04 system with an 8-disk raid 6 array, that crashed while having a faulty disk (I only noticed that there was a faulty disk after the crash). The raid array has survived ...
- 1
0
votes
1
answer
2k
views
Are wipefs -af and mdadm --zero-superblock equivalent for erasing raid metadata?
I saw instructions about how to remove software raid, and some of them contain both instructions: wipefs -af <device> and mdadm --zero-superblock --force <device>.
Is it neccesary to use ...
- 986
0
votes
0
answers
121
views
Two disks MDADM RAID 1 setup running with one disk
I have MDADM RAID 1 with two disks but one failed and will be replaced soon but till this time is it possible to set the raid to active to access my files because now the state is inactive ?
Thank you....
- 1
0
votes
1
answer
576
views
What does delta devices of the mdadm--detail output mean?
Here is an output of mdadm --detail:
$ mdadm -D /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Wed Jun 24 16:41:17 2020
Raid Level : raid5
Array Size : 7809195456 (7447.43 GiB ...
- 272
3
votes
4
answers
10k
views
MDADM reshape really slow
To sum up : My raid reshape with mdadm is really slow.
The complete story : 3 days ago I realized that one of my disks from a raid 5 array was faulty. I removed it and replaced it with a brand new ...
- 335
0
votes
1
answer
388
views
Long-term local offline RAID storage of never-changing data
I have about 20TB of data that will remain unchanged (forever) and I am planning to make offline copies with a little redundancy.
I already have a lot of 2TB drives that I plan on using and I am ...
- 677
1
vote
1
answer
614
views
Can I read from a 2-disk RAID 1 array from a 2-bay external USB disk dock?
I have 2 disks which were the only disks in a Linux RAID 1 array. The RAID information is still readable via mdadm when mounted externally via USB using my 2-bay disk dock. Is there a way I can read ...
- 53
2
votes
0
answers
52
views
Sata 2 vs Cacheless SAS6G JBOD Performance
I have some "old" servers here, using Asus P9D-MH/SAS/10G-DUAL
https://www.asus.com/Commercial-Servers-Workstations/P9DMHSAS10GDUAL/
This board comes with a SAS 6Gbps controller, an LSI SAS2308 ...
- 37
1
vote
2
answers
2k
views
Recovering LVM Raid-5 Array
I have a failed raid-5 array that I can't seem to recover. Basically the story is I had this data in raid 5 and I was using LVM which has built-in raid now. I noticed one of the disks going bad so I ...
- 1
1
vote
0
answers
569
views
Error when trying to reduce number of drives in a Linux RAID array
I’ve got a Synology NAS that I’m trying to reduce a RAID6 array from 12 drives down to 11 drives.
I’ve already reduced the size of the file system and logical volume, but when I try to reduce the ...
- 11
0
votes
0
answers
322
views
Hybrid RAID (SSD+HDD) gives unexpected results
I am doing some experiments with hybrid RAID in Linux.
My test consists of the following:
2x256GB SSD in RAID 0 (/dev/md1)
2x256GB HDD in RAID 0 (/dev/md2)
Then I made md1 and md2 into a RAID 1 (/...
- 13.5k
0
votes
0
answers
1k
views
Creating Raid Disk from Existing Disk
I was going to follow the guide here on arch wiki to convert a single disk to a raid disk using mdadm. The disk in question is a proxmox system disk.
My plan was as follows:
Create the raid disk ...
- 812
1
vote
1
answer
746
views
MDADM reshape 2 disk raid 5 to 4 disk raid6
I have a somewhat non-standard mdadm reshape going on. I have a 2 disk raid5 (clean state) which I want to reshape into a 4 disk raid6. The reason this was created as a 2 disk raid5 instead of a 2 ...
- 476
0
votes
0
answers
721
views
Dual boot Manjaro and Windows without switching to AHCI
I've recently bought a new Lenovo IdeaPad C340 with an M.2 SSD and Windows 10 preinstalled. Now I want to dual-boot it with Manjaro (Awesome WM edition, shouldn't matter through).
The problem: ...
- 111
1
vote
0
answers
480
views
Can I force-mount a raid filesystem beyond repair?
I had a 3-disk RAID5 setup. While migrating carelessly, a disk popped out of the array and then another followed closely.
I therefore cannot legitimately rebuild the array because there is no aligned ...
- 261