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Questions tagged [software-raid]

Questions which refer to software RAID implementations.

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Questions about external SSD software RAID?

I currently have two 2.5" 4TB SSDs. My plan is to get an external Thunderbolt enclosure with a minimum of 4 bays and no hardware RAID (e.g. OWC Thunderbay Mini), and buy two more 4TB SSDs to make ...
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I want to collect system information using bat file

I hope you all are doing well. Help me please. I want to collect system information using bat file like: List of Software OS information System Hardware details. I had some code which collects the ...
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Create a bootable RAID 1 in Windows 10/11?

I have two NVME 2TB PCIe X 4 and I am using an AMD 5950X. How do I create a RAID so that it’s bootable for a Windows 10/11 install?
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Should ZFS RAID-Z2 theoretical maximum be 256+2 drives?

For RAID 6 in wiki, the extra priority check bit Q is calculated by shifting of bits. https://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_6 Suppose we would like to distribute our data over n {\...
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How do I reassemble a RAID1 array which was created in OMV5(open media vault) on raspbian buster - RAID config has completely disappeared after update

How do I reassemble a RAID1 array which was created in OMV5(open media vault) on raspbian buster? I have 2 disks /dev/sda/ and /dev/sdb/ which have the following partitions, which look intact pi@...
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mdadm RAID5: can't read superblock on /dev/md127

Today, when I wanted to replace a failed HDD on my mdadm-RAID5, the RAID stopped working at all. sudo mount /dev/md/md127 /media/ mount: /media: can't read superblock on /dev/md127 Checking the ...
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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 --...
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How Do I replace a RAID 5 Disk?

RAID 5 (3 disks) failure on workstation which now boots to emergency shell. I replaced the hard disk (/dev/sdb) but can't restart the array and mdadm shows odd configuration as follows: mdadm --...
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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 ...
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Improve mdadm RAID5 with SSD Cache

I have the following Setup: 3x 3 TB SATA HDD With software raid connected to a RAID5 On top of this LVM for snapshots (backup) And on top of LVM EXT4 formatted. Actually around 400GB is used. I have ...
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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] [...
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My Software RAID 5 has 4 3TB HDDs, now two of them have bad sectors. What is a good way to replace them?

I run mdadm on Ubuntu 18.04 to build a RAID 5 array of 4 3TB drives several years ago. The machine was not running for years. Yesterday I powered it on and found two of the disks have a bunch of bad ...
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MDADM RAID1 failure but how to tell which disk has gone bad?

I have been running an MDADM RAID1 mirror for a few years. Yesterday, I got an alert from madam saying it has degraded and then found this: # cat /proc/mdstat Personalities : [linear] [multipath] [...
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How do I access a Windows 10 Storage Spaces from another Windows 10 install?

BACKGROUND So a while ago (maybe 3 weeks ago) I decided to divide my NVMe in half to duel boot Windows and Linux. In the process I somehow deleted my Windows boot partitions or something. I honestly ...
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Can Clonezilla work with Windows striped volume?

Let's assume I have striped volume in Windows 11 (two disks). Will Clonezilla be able to create and later restore images of both disks, so Windows will still recognize them properly as striped volume?
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Mount ddrescue'd mdraid member image (with devicemapper snapshot overlay)

My Xpenology (Synology NAS SW on normal PC HW) started complaining of bad sectors on my single-disk raid1 backup disk. I restarted from a SystemRescue USB stick and ddrescue'd what I could of the ...
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What exactly is Parity Consistency Check that Synology NAS runs when a new disk is added and why does it normally take a long time to complete?

What exactly is "Parity Consistency Check" that Synology NAS runs when a new disk is added and why does it normally take a long time to complete? Why does the process takes a long time? (can ...
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Is there a way to install Windows onto Dynamic disks?

I like using the Dynamic disks with striping in Windows and was wondering if I could install from a Windows ISO onto a set of striped dynamic disks. So far in my testing, that's not possible. I get ...
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mdadm - cant read superblock - can I zero the superblocks without erasing data and recreate a raid?

Today I had to fix a Server Fan by disassembling and rebuild it. After booting the server I had the problem that all disks where not at the same location they have been yesterday. So the system ...
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Software RAID10 done via Windows 10 - would it remain after system re-installation?

Configuration: 4x1TB HDDs added into a storage space in Windows10 with 2-way mirroring, resulting in 2TB storage (so, I believe, "software-RAID10"): screenshot of the setup The question is - ...
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Recoverability of Windows 10 storage pool (Software RAID 5)

I'm currently looking into RAID 5 for my growing data for my home PC and some things are still unclear to me. I currently have each of my drives backed up by an additional "backup" drive and ...
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Hard disk spin-up on demand only under linux

I have a PC where the system (Debian 11) resides on an SSD. As an addition to this I would like to set up two hard drives as a RAID (level 1). Because I would use the RAID only for occasional backups ...
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Rebuilding an inactive RAID5

I have a 7 x 14TB RAID5 in my workstation with Centos 7. Last week one of the drives was marked as faulty by SMART (/dev/sde). I used mdadm to mark this drive as faulty and to remove it from the array ...
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Create RAID 1 on Windows 10

Usually I work with RAID controllers however in this case this is not possible so I need to use the "Windows software raid" (or some other kind of software raid for that matter). If I have ...
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What kind of raid I have?

I have the raid option on bios and I got Intel chipset SATA/PCIe RST premium and Microsoft Storage Spaces controllers under storage controllers on device manager but both my disks on basic mode. Is ...
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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 ...
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How long should RAID 10 syncing stay at 'recovery = 99.9%'?

After replacing a faulty disk in a (CentOS 7) RAID 10, the syncing is at the following stage for quite some time now; it has had this state for more than a day: md10 : active raid10 sdp1[9] sdo1[8](S)...
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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 ...
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mdadm: RAID gone after reboot, partitions gone, service masked

Some weeks ago I set up a software RAID 1 with mdadm, consisting of two 2TB WD Red HDDs, as a backup medium (Debian Stable). Everything works, I hooked up everything for it to come up after a reboot, ...
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¿Does a RAID array persist through multiple OS installations?

As title said; i'd like to know if a Windows-made software RAID array will persist a new installation, if I could read that RAID with another Windows partition or installation and if other OS could ...
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Is bad memory an issue for Windows Server Software Raid 5 resync?

So, I have a setup at home where I run a Windows server 2019 running a Software Raid 5 setup running over 5 disks created through disk manager. Since this is a home system, I haven't really found ...
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Replace a Raid 0 Disk (Software Raid/Windows)

I would like to know if it is possible, to replace a Disk in a Windows Software Raid 0. (e.g. clone the disk to another one inside the OS) I have seen another post where this question was asked, but ...
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Is it possible to clone a single disk from a Windows striped array ("RAID-0")?

I know it's different for 'actual' RAID arrays, but I was wondering if maybe Windows striping / software RAID may be different, since all the striping happens within Windows and not a dedicated ...
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Is Intel ESRT2 Software-RAID?

I have 2 options for configuring RAID at the UEFI level. Intel ESRT 2 and Intel VROC which is the successor to Intel RST (rapid start). I know Intel RST and thus VROC (which is present on non server ...
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How to completely scrub an raid disk?

I have started working on raid devices related project. And I would like to be able to test my changes easily. The problem is whenever I need to create or remove a new raid device, I have to go ...
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Recreate hardware RAID 1 out of fully-mirrored disks without data loss in software RAID 1

I have two identical hard disk drives with identical data. They were a former hardware RAID 1 on a MSI H97M-E35 mainboard with an Intel H81 Express chipset and were used as data drives (not as system ...
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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 ...
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Machine crashes with AHCI controller unavailable! and not using Asmedia Controller

I have an Machine that crashes periodically. When I recreated the issue I found that the machine fails with the error AHCI controller unavailable! (full errors in the screenshot). I have an AMD Ryzen ...
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linux raid5 with 7 disks have readerror without readerror of one of the drives

i have a mysterious problem: i install a raid5 array with 7 1,5 TB disks in one of my server for some years under kernel 2.6.x with metadata 0.9 and have no problems. in the last weeks, i update this ...
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What would happen if a RAID 1 contained 2 different file versions?

Let's say a hardware RAID 1 controller with disks A and B was taken offline, and a file present on both disks was altered on disk B (all within an offline state). When the RAID controller is turned ...
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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 ...
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Disable warning from mdadm for “degraded” RAID1 with missing drive

I recently had a server outage due to a failed drive. Because of that I set up the server with a new SSD in RAID1 this time but until I managed to get another SSD drive the mdadm-based RAID1 runs with ...
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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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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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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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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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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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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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