Questions tagged [raid5]
The raid5 tag has no summary.
125 questions
2
votes
1
answer
93
views
Reassemble Raid5 Array after disabling TPM
Edit: Both /dev/sdd and /dev/sde are missing super blocks. I assume this cannot be fixed. I am whipping the drives and starting over.
I just finished coping 8TB worth of data to a new raid5 array. I ...
- 21
1
vote
1
answer
80
views
Is software raid5 created by mdadm in debian compatable with openbsd softraid
I have created software raid5 using mdadm in Debian Linux. Now I want to switch to OpenBSD and interested if I will be able to mount my raid5 under new system?
- 19
1
vote
1
answer
103
views
Destroyed file system after adding disks to LVM on RAID5?
Just adding a bit of storage capacity on my Openmediavault storage server went wrong. What should I do to recover? Can you lead me?
This is what I did:
1 /dev/md2 raid5 set created, went well
2 /dev/...
- 37
0
votes
2
answers
70
views
Reassembling RAID 5 when 1 disk has been overwritten
I was having trouble with my Ubuntu system that was running a Raid 5 setup with 4x4Tb drives: /dev/sda[1234]. The OS was installed on /dev/sde.
So I decided it was time to do a clean install of the OS....
- 1
1
vote
0
answers
56
views
Failed Raid5 array with 5 drives - 2 drives removed
Synopsis
Healthy Raid-5 array had 1 drive removed, quickly reinserted and started rebuilding. Then a second drive was removed within 10 minutes. Original drive assignments (sda, sdb etc) have changed ...
- 11
2
votes
1
answer
61
views
"mdadm --grow" is stuck with faulty devices
I am not the first one with a stuck mdadm --grow but I think that mine is a bit different from the others. In my case all devices are faulty and the state says FAILED:
root@linux:~# mdadm --detail /...
- 911
0
votes
1
answer
154
views
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 ...
- 111
2
votes
2
answers
329
views
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 ...
- 359
4
votes
1
answer
364
views
RAID5 - Mark a disk faulty during reshape
Context
I have a software RAID5 array (mdadm) on 3 disks. Last week, one disk started to get reading issue:
# dmesg
ata3.00: exception Emask 0x0 SAct 0x30000001 SErr 0x0 action 0x0
ata3.00: irq_stat ...
- 43
0
votes
3
answers
665
views
How to extend LVM RAID5
This is the first time I'm posting here; usually, I always find someone who has had the same problem as me. But I'm facing an issue with my RAID5 setup using LVM and could really use some help.
...
- 1
0
votes
1
answer
48
views
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 ...
1
vote
1
answer
170
views
Trouble Mounting RAID
I have a RAID array that I cannot seem to mount after a power failure. The mount error says it cannot find the UUID even though it is to UUID reported by mdadm.
mdadm --examine --scan
ARRAY /dev/md/0 ...
- 111
0
votes
2
answers
1k
views
What is the difference between BTRFS RAID1 and BTRFS RAID5 on 3+ devices?
According to "Examining btrfs, Linux’s perpetually half-finished filesystem", BTRFS RAID1 is said to be "guaranteed redundancy—copies of all blocks will be saved on two separate devices&...
- 35.1k
1
vote
0
answers
181
views
LVM on RAID 5: LV does not mount at boot, need fsck
I am using Debian 11.
I have a mdadm RAID 5 array of 5 disks (4 active, 1 spare) used as a PV for a VG in which 2 LVs have been created : one for home, one for backup.
The home LV mounts at every boot,...
- 11
0
votes
0
answers
43
views
Missing usable space on RAID5
I have 3 drives, 4TB each, in a RAID5 setup. Usable space is 7.24 TB, all good & checks out. I use 5.5Tb and it reports 600Gb left. Maths does not checkout. I get an external drive and I move 5....
- 101