Questions tagged [software-raid]
Questions which refer to software RAID implementations.
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How do I tell mdadm to start using a missing disk in my RAID5 array again?
I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine.
When I had it all back ...
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Parity errors after verify with Intel RST
I have Intel RST RAID 1 running on a Windows 7 machine. I have it set to do a verify and repair every week. I frequently notice parity errors, some weeks over 100 for a 1 TB RAID 1 array. I've ...
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3
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RAID 5 with SSDs; how many and what class of SSDs to use?
I have a 850 EVO 250gb as win/programs/games disk and I am thinking buying more SSDs to go with RAID 5 in order to gain more speed. I know the pros and cons of RAID 5.
The question is:
5 cheap 120gb ...
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1
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Sharing an Intel RST between Windows and Linux
I have an Intel z68 motherboard, which makes use of Intel Rapid Storage Technology (RST) -- Version 10.5. If possible, I'd like to split my RAID 1+0 RST drive equally between a Linux and Windows ...
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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 ...
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Windows 10 - RAID5 - Intel RAID or Storage Spaces?
Which method should I use to RAID5 my 3 drives?
At the moment I started out with Intel's RAID but it seems super slow. Steam can barely download with 10M/s speeds and the array sometimes have ...
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Restore linux partition table of one raid0 drive after accidentally installing windows over it
How the problem arrose:
So I made a very stupid mistake yesterday. I installed windows 10 on the wrong harddrive (I didn't expect the installation to start right after choosing the drive). After ...
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Unable to re-assemble RAID1 using mdadm -- failed to run array, invalid argument
I'm trying to assemble a RAID1 array using mdadm. I'd like to be able to debug this error, but I'm not sure where the error actually is, other than "Invalid Argument".
Here's the main log. I can't ...
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chkdsk on a mirrored drive
I am running Windows 7 and have two 1TB hard drives mirrored using disk management. (The mirrored drives are not the system disk.)
I am getting NTFS Error events that say "The file system structure ...
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Windows 8.1 Storage Spaces Pool deletion
I am trying to delete my RAID 0 storage pool and it seems that maybe the storage spaces utility doesn't recognize the pool being there. According to these screenshots (and others I have found that are ...
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mdadm.conf: mdadm -E --scan *vs* mdadm -D --scan, which is correct to use?
I have two questions:
It's not clear which flag to use when generating mdadm.conf.
I've seen people and documentation use
mdadm -E --scan
I've also seen mdadm -D --scan.
Which is correct to use?
...
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Building a RAID5 out of multiple drives
I have 2x 12TB drives and then these three additional drives: 2TB, 3TB, 3TB
I want to create a RAID5 with as much capacity as I can. So, I was wondering if it'd be possible to use the three small ...
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How to activate disk that was originally in Windows RAID 1
I took HDD from a computer that was running RAID 1. I have inserted that drive into another computer expecting it to be immediately recognized. It is not recognized, and Windows can't activate it.
...
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Intel Matrix Storage Manager vs Linux Software RAID
The chipset I'm using supports the Intel RSTe technology. It means that I have two options for RAID setup:
Ordinary linux software RAID, using mdadm command.
RSTe (either by the BIOS or, again, using ...
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What are the options for simple file or data redundancy on a custom NAS?
I'm asking this for the sake of clarity as I'm in the process of building a home NAS and going crazy trying to decide how to set it up.
What options are there for no hassle file/data rendundancy to ...
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Can't add unallocated 2nd drive to C:\ in either striped or spanned volume
I was playing with getting rid of my BIOS RAID 0 and using AHCI. This would destroy the RAID 0 meaning I'd have to create a software RAID with Windows.
After converting to AHCI and doing a clean ...
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mdadm re-added a removed disk to my RAID1 and skipped re-sycning it, what went wrong?
I ran into what is a true mystery to me today, and would love if someone could give me an idea of how what happened is even possible.
We had physically removed a disk from our software RAID1 (Ubuntu ...
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1
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Drawbacks of small ZFS pools versus large
We are redesigning out current ZFS file server. It currently only has one pool of over 70TB.
I see this is a problem since, if there are enough disk failures within the pool to make it non-...
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Is linux software raid recoverable if independent OS drive fails?
From my understanding RAID controllers are responsible for managing reads / writes to and from RAID arrays since data for certain configurations (5 and 10 come to mind) can be sharded across multiple ...
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Raid Spare Spin Down
I have a software RAID 5 array (mdadm under Debian Linux) that has been up for the better part of a decade and has seen it's fair share of drive failures. I've always been leery about setting up a "...
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Programmatically check Linux RAID array (MD)
I would like to programmatically check if Linux RAID arrays are broken.
For a RAID-1 (mirror) array, I am using this simple method which was worked for several years, with good results:
cat /proc/...
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1
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Adding a new hard drive to RAID1 software RAID fails
I've got a Mac Pro 1.1 running macOS Server 10.6.8 that I want to use as a RAID-Server. I use Disk Utility to run a RAID1 set with two 500GB hard drives.
Now adding a third 500GB hard drive to the ...
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df is not listing one RAID device (RAID1) on Ubuntu 18.04. fdisk -l lists both
I had installed two RAID1 drives on Ubuntu 18.04 and had verified that if any one drive is taken out, the system booted and then after the second drive was added, it resynced.
That was some months ...
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How to safely configure/use SW RAID 5 with Raspberry PI 4b / DietPi without data loss?
This question is also to clarify if I have a decent bug here, software or hardware. My aim is to set up a SW-RAID-5 to my Raspberry PI 4b system using a USB3.0 HUB with 3 4 TB Western Digital hard ...
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Reduce loadtime in games merging two folders across ramdisk and local disk
I've found a program to emulate a drive in my memory, RAMDrive.
RAMDrive creates a drive (G:) on my computer, which allows me to have super fast read/write on that drive.
Now I was thinking I could ...
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Would it be advisable to have 2 raid-1 (mirror) using just 2 physical drives compared to just 1 raid-1 on 2 physical drives?
I'm using 2-bay drive Synology (implies I'm using linux mdadm software based RAID system).
The motivation for doing so is to lessen the time rebuild RAID-1 array after it goes degraded. I currently ...
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Why Raid 1 don't improve read performance like Raid 0?
It should be able to read the data across the 2 disks like with Raid 0 right?
but when I look at benchmark it looks like only one drive is used to read the data.
https://raid.wiki.kernel.org/index....
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mdadm UUID lost after reboot
Here is the problem. I part all disks into 4 partitions.
Use all disk partition one to create raid1(md0). However, after reboot some of the raid members lost, the raid is degraded. Use blkid to check ...
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Dualboot Windows 10 and Linux on software RAID with common devices
I'm interested in improving the reliability and availability of the operating systems on my workstation as part of an upgrade being planned soon to my hardware. I tried to find a question like this on ...
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Can a mdadm software RAID 1 drive be accessed independent of the other drive in the array?
I'm doing research for a project I'm starting, so I cannot provide configuration here. Say I have a software RAID 1 array configured between two drives with mdadm.
If I write data to the array and ...
CommunityBot
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Does RAID 1 improve random read latency?
Specifically, in the cases of mdraid and Intel Rapid Storage.
If so, is it done by "racing" the disks, or is only the "less busy" disk that's queried?
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Moved disks to new computer, RAID won't re-assemble
I bought a new computer with a NVME ssd.I moved all the old disks over, but I couldn't get it to boot the old disks, so I tried just installing kubuntu on to the new machine's NVME.
After installing ...
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mdadm RAID 6 drive failed over, then some of my data disappeared
Background
For 7 years now I've had a personal file/media server running Fedora (initially 21, currently 30). The main storage array comprises 3TB drives in an mdadm RAID6 (originally, RAID5). Over ...
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How do I diagnose a bottleneck in an Intel Atom based Ubuntu server?
I have a small media server at home which has software RAID and a gigabit link to the rest of my network.
For some reason though, I only get ~10MB/s transfers when copying to/from the server.
I use ...
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Windows 7 software RAID 1 hard disk reactivation taking a very long time, how normal is it and what can I do?
I had an HDD start failing in my RAID 1 array recently (two 2 TB HDDs, no operating systems installed on the RAID). The failing drive had to be replaced, but during debugging of another issue (which ...
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Failed GPU passthrough using Unraid 6.6.6
A while ago, I have build a new Ryzen setup. I am currently experimenting with Unraid 6.6.6 and trying to setup my daily Ubuntu VM with a passed through GTX 1060 from Inno3D. Unfortunately, I get ...
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mdadm can't reasamble raid 05
English is not my first language, so sorry in advance for any grammar errors.
A partner configured a raid 5 of raids 0 with mdadm (I did not wanted to put the data on any thing that was not one of ...
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I added 5 drives to mdadm raid array, then I noticed 3 had partitions on them already. What is going to happen?
I have a 15 drive raid6 array using MDADM on ubuntu linux 18.04.2 server. I installed 5 more drives and added them to the raid array, and it started reshaping. However, after that I noticed that three ...
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Software RAID 0 under Window 7 on 2 HDD only (including system drive) - is it possible
I have two hard drives in my notebook. I cannot add third drive.
Is there a possibility to somehow set up software RAID 0 (striped) under Windows 7? My notebook does not support hardware RAID 0.
I ...
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Server 2016 Storage Spaces and NumberOfColumns
I think we all know about the NumberOfColumns issues:
https://blogs.technet.microsoft.com/tip_of_the_day/2015/03/17/tip-of-the-day-numberofcolumns/
That said, let's pretend to plan the following (at ...
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raid 1 badly detected as raid 0 when one drive is missing
I'm learning raids, so maybe this is some basic question, but it's not covered anywhere...
When I create raid 1, update /etc/mdadm/mdadm.conf as[1], run update-initramfs -u, I can reboot and mount it....
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btrfs ontop of mdadm raid - calculating stripes for corrupt sectors for use with raid6check
I've got a setup with btrfs running on top of mdadm raid6 as btrfs's RAID5/6 code isn't stable yet. I figured this way I'd get the benefits of snapshotting and checksumming with a few extra hoops to ...
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Linux RAID1 disk not booting in new PC - Gave up waiting for root device
I had a Debian linux PC with two hard disks using raid1. Used is as DHCP and firewall. The raid1 consisted of two partitions, md0 as swap, md1 for / .
The motherboard in that PC stopped working, and ...
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RAID 5 Windows 10
Rev 1. - Provided Screenshot for Further Clarification.
When I convert my storage drive from a basic to a dynamic disk in Windows 10, using diskpart.exe, there is one partition but no volume to go ...
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how can I add SSD as RAID 1 cache?
I have 2x 3TB hard drive setup as software RAID 1. sometimes, it was painfully slow.
How can I add an SSD as its cache? is it possible?
Note : the RAID was where the debian linux inside booted from....
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Convert RAID 1 to RAID 10 in mdadm
In my current Ubuntu server, I have 2x 2TB Western Digital RED hard drives in a RAID 1, using mdadm. I would like to add 2 more 2TB RED drives, and convert it to a RAID 10. I realize I would have to ...
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Create JBOD or RAID 0 on a Windows Drive
Is it possible to create a JBOD or RAID 0 using an empty drive, and a drive that contains windows? I don't have a very computer literate family, and teaching them to put their stuff on the D: rather ...
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614
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File system corrupt after re-adding software RAID 1 member after test. Why?
A colleague and me set up a software RAID 1 with mdadm consisting of two physical disks, with two partitions on the virtual device. The set up went fine, and booting directly from one of the RAID ...
CommunityBot
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Mdadm raid5 - Cannot assemble mbr metadata
I have a problem. I found similar threads all over the internet, but I thought it might be better if I ask one specific with this configuration. There is a ubuntu 18 machine with 5x 4tb. I think it is ...
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M.2 Drives not appearing after reset of Windows 10 machine
I recently, mistakenly uninstalled a driver which forced me to completely reset my machine. I have a Dell Precision Tower 5810 running Windows 10. I have a standard internal hard drive as the C: drive....
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