All Questions
53
questions with no upvoted or accepted answers
6
votes
1
answer
504
views
mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?
My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
- 191
4
votes
0
answers
3k
views
How to prevent an mdadm array check from consuming excessive system resources?
Once a month I've been doing
echo check > /sys/block/md2/md/sync_action
in order to force a software raid consistency check. The problem is this is a 7.2T RAID 5. The consistency check takes ...
- 181
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/+...
- 715
3
votes
0
answers
3k
views
Synology DiskStation: How to stop/interrupt a running reshape (RAID5 -> RAID6)
The short of it: I have a running reshape from RAID5 with 5 disks to RAID6 with 6 disks which needs to be stopped, so I can power off the system. I do not care if the reshape needs to start fresh once ...
- 86
3
votes
0
answers
255
views
Linux Software RAID - Migrate from disk device to a partition
I have two 8TB disks configured as RAID1 using mdadm on Ubuntu 18.04 server. They way I created software RAID was on the whole device - /dev/sdb and /dev/sdc - instead of the partition such as /dev/...
- 31
3
votes
0
answers
185
views
Metadata of the assambled raid inconsistent with the metadata of the individual drives?
We have a raid 10 with two failed drives, with one drive from each set still functional.
When booting into rescue system the metadata seems to be fine and consistent with the expected state.
The ...
- 31
3
votes
1
answer
249
views
SSD failed, mdadm thinks the RAID0 array is fine
I have a RAID0 array created using mdadm in Debian. sdf is the drive that died.
$ cat /proc/mdstat
md4 : active raid0 sdf1[1] sde1[0]
468859904 blocks super 1.2 512k chunks
$ mdadm --misc --...
- 161
2
votes
0
answers
145
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
2
votes
0
answers
446
views
Mayhem with partitions and GPT: mdadm RAID overwritten by Windows partition - possible to fix partition table?
dear Community,
I’m writing as I may have wrecked my system up.
I launched disk manager in Windows; as one of my disks was not recognized, and as Windows kindly suggested me to initialize the-said ...
- 21
2
votes
0
answers
266
views
Raid6 mdadm reshape operation interrupted - now cannot mount or examine
Edit: Once the reshape finished the drive became fully accessible again.
I had a power failure while a raid6 array was being reshaped, and now certain operations cannot be run against it, including ...
- 279
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
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 ...
- 21
2
votes
0
answers
2k
views
Recovering a Synology Raid 0 from Ubuntu (Healthy drives)
I am trying to remount a Synology raid 0 with 3x2GB drives. As far as I know, the drives are in healthy condition.
I simply don't have enough space to do a full image of these before I proceed, so I ...
- 21
2
votes
0
answers
949
views
RAID5 fails while recovering (mdadm): Any chance to resync?
My RAID5 is going to die because, while restoring a failed HDD, on another HDD read errors occurred and a restore is impossible. I just want to know whether it's possible to restore only a part of ...
- 21
2
votes
0
answers
421
views
Dual boot Win8/Linux on Asus Zenbook UX301 keeping intel imsm RAID0
I have Asus Zenbook UX301 with Win8 preinstalled. I would like to have a Linux installed in dual-boot configuration. However, Windows is using the notebook 2 SSDs as intel RAID0 (rom-based RAID, ...
- 121
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 /...
- 121
2
votes
0
answers
3k
views
mdadm: hot remove failed
My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /):
...
- 123
2
votes
2
answers
1k
views
Recover Linux software RAID5 array after server upgrade
I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
- 121
2
votes
1
answer
229
views
Gentoo Linux -> Ubuntu: Can I Preserve My LVM/RAID Devices, Or Do I Need To Reformat?
I've got a Gentoo box that I'm interested in switching over to an Ubuntu box.
I currently have the partitions laid out using a mixture of RAID (mdadm) and LVM2, as specified in this document [1].
...
- 2,964
1
vote
1
answer
297
views
Clean up left-over around a RAID5 coming from a QNAP NAS
I just moved a 12TB RAID5 (4 disks of 4TB) from my QNAP NAS into my Linux Server (/dev/md0), and I noticed that there are three "left-over" partitions on each disk (/dev/sd*1, /dev/sd*2, /...
- 31
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
1
vote
1
answer
623
views
Way to monitor progress of RAID10 rebuilding disks, when RAID does not show in /proc/mdstat?
I have an inactive RAID 10, and the output of mdadm --assemble --scan -v |& tail -17 is:
mdadm: /dev/sdn1 is identified as a member of /dev/md/10, slot 5.
mdadm: /dev/sdk1 is identified as a ...
- 1,163
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.
# ...
- 845
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
1
vote
0
answers
23
views
Remounting imperfect RAID 6 after clean install
I am running a small laboratory server (intermediate logins and data storage). It has 5 physical drives: one (sda) for /, and 4-drive RAID 6 (sd[b-e]) for /home. Due to a hardware fault, I had to ...
1
vote
0
answers
373
views
reassemble mdadm raid6 with 3 of 5 disks showing possibly out of date?
Not sure what happened but my raid 6 serving as xfs storage stopped to work
First I checked SMART of all devices but non of them showed an error.
cat /proc/mdstat
Personalities : [raid6] [raid5] [...
- 111
1
vote
0
answers
543
views
One RAID1 missing after reboot
I'm using Open Media Vault 3 that is based on Debian 8.
I already have a RAID1 of 2x4TB WD Caviar Red, and now I'm tring to build a RAID1 with two Seagate Ironwolf 6TB.
Whe I build it anything is ...
- 21
1
vote
1
answer
558
views
Can't find RAID1 after reboot
I have Debian8 with Open Media Vault on it.
I'm tring to build a RAID1 with two Seagate Ironwolf 6TB.
I can build the RAID1, create an ext4 partition on it and use it without a problem.
The problem ...
- 21
1
vote
0
answers
1k
views
mdadm partiton not large enough to join array
I've used Linux on and off for the last many years, mainly as dual boot or as Virtual Machines, but when I decided to build a Dev Laptop I though I'd bite the bullet and put Linux on as the base OS.
...
1
vote
0
answers
77
views
Is there a safe way to move a partition beneath a linux software RAID5 using mdadm?
Suppose, for example, that you have a RAID5 across multiple disks and you would like to retire the oldest of the disks and replace it with something from this decade. I know I can fail the partition ...
- 372
1
vote
0
answers
707
views
mdadm: faulty Array, how to get recover as much as possible?
I have a RAID5 with 4 Disks in my PC. All of them were healthy (and the RAID itself) until before.
I tried to install windows 8.1 which automatically creates this "SystemReserved"-Partition. The ...
- 11
1
vote
0
answers
715
views
Create a mdadm raid mirror of an existing lvm
Hello I'm trying to figure out how I can create a pretty strange mdadm mirror of my lvm.
I have 4 disks, (sda,b,c,d).
Each disk has 2 partitions:
1Gb - physical volume
500mb - Swap
My system lvm ...
- 197
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
0
votes
0
answers
16
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
54
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
513
views
Linux Software Raid Rebuild on machine failure
I have a debian home server that has a 4 disk software RAID 5 array. My OS runs only on a normal nvme SSD. I know thats not secure, but it is a home server, so I didn't really care when I installed it ...
0
votes
1
answer
223
views
How to reshape a 2-disk RAID1 into a 2-disk RAID5 using mdadm?
According to How to remove a drive from a non-standard 2-drive RAID 5 array?, "with mdadm, a 2 drive RAID 5 is binary identical to a RAID1". If that is so, what's the mdadm command line for ...
- 105
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
0
votes
0
answers
4k
views
wrong fs type, bad option, bad superblock on /dev/mdXY
If I use a expensive commercial software I can read the data but I did not buy it because it is too expensive for me.
Since I have the conviction that I do not reformat the hard drive again and I can ...
- 281
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 (/...
- 123
0
votes
0
answers
434
views
Why MDADM remove one of my Raid1 disk randomly?
I have a rapsberry pi 2 with 2 HDD connected to it thanks to a SATA-USB adapter. They are Raid1 mounted with MDADM.
The problem is that one of the two disks is randomly removed and marked as "Faulty"....
- 11
0
votes
0
answers
116
views
Computer crashed, raid array in trouble
I arrived home today to find my home server was off (not idea why). Turned it back on again and the raid array was failing to mount.
/proc/mdstat shows:
Personalities :
md0 : inactive sdh[7](S) sdc[...
- 1
0
votes
0
answers
48
views
Fedora change disk then install error and which solution is faster?
I use fedora and mdadm(2hdd create to raid1), but if I change one disk then on fedora install program not work have error message. I use "sfdisk -d /dev/sda | sfdisk /dev/sdb" create sdb of ...
- 1
0
votes
1
answer
219
views
How do i prevent lilo from doing a disk scan?
I have gentoo installed using root on LVM on RAID5. I made a mistake when I set up lilo but the initrd created by genkernel caught it and allowed me to type in the correct root partition. I have ...
- 372
0
votes
1
answer
42
views
Error RAID1 but can't seem to find where the error is?
I'm having trouble figuring out where the problem is.
I'm seeing my two drives... I removed a failed drive and installed an empty one. Thought I added it to the raid and it said it was rebuilding.
...
0
votes
1
answer
262
views
Linux soft RAID5 array with mismatched events won't assemble
The last three nights, one of my USB controllers has gone offline in the middle of the night, knocking 4 of my 8 disks offline. The first two times, I was able to get it working again with mdadm -A /...
0
votes
1
answer
91
views
Recovering software raid
I have a 3-disk software raid 5. Two disk appear to have failed at the same time; their number of Events is the same, while other third disk's is higher. I have copied all three disks into new ...
- 103
0
votes
1
answer
2k
views
I reinstalled ubuntu and now I don't see my RAID drive
I originally had a Ubuntu 12.04 system with RAID5 array that I built using mdadm.
Due to issues with graphics drivers, the 12.04 system crashed and I had to reinstall the operating system. After ...
- 270
0
votes
0
answers
511
views
Hybrid Raid-1 HDD + SSD -- Write Intent Bitmap
I am currently running a laptop with 1 HDD and 1SSD.
I currently am using mdadm to put some partitions in a raid 1 configuration with --perfer-write set on the HDD. I have this working correctly ...
- 229
0
votes
1
answer
164
views
How to create physical and logical volumes on system reboot
My system is set up so that I take four devices, create a RAID 10 array out of them, create a physical volume, a volume group, and then three logical volumes, and lastly I create filesystems out of ...
- 141