Questions tagged [software-raid]
Questions which refer to software RAID implementations.
512 questions
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Create a bootable RAID with ALL drives (4 total) for Rocky Linux using 'mdadm'
I have a HP DL360 Gen 6, and there are 4 drives total.
I would like to bind ALL 4 DRIVES into ONE array using 'mdadm', or at OS load.
How do I go about doing this?
TIA> -rad
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66
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Would it be ok/useful to mirror a SATA HD or SSD with an nvme SSD?
I have a laptop with a 2TB SATA SSD which also has an M.2 NVME slot with currently a 128GB SSD inside. I wondered if it would help to put a 2TB SSD in the NVME slot and mirror both ? The reasoning ...
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47
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self healing btrfs on top of mdadm raid6
Some sources say that btrfs can self heal when used on top of a mdadm RAID 1, 5 or 6. Is that correct?
This is how it suppose to work:
btrfs detects the bit flip with he help of the checksum when ...
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1
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271
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"There is not enough usable space for this operation" when adding mirror to volume in Windows Server
I'm trying to mirror Windows volume between two disks, but it won't let me convert disks to dynamic until I delete Recovery partition.
DISKPART> list disk
Disk ### Status Size Free ...
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1
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79
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RAID 5 failure after multiple drives got disconnected
I've been running a linux software RAID 5 undergoing a reshape(4→6 devices) and multiple drives got disconnected unexpectedly. The drives themselves are perfectly fine but the RAID array is in a state ...
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55
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RAID0 Superblock Lost, but Data (Assumed) Intact; How to Recover?
My computer's Intel RST RAID0 has always been a bit unreliable and would often have trouble booting (first two attempts would fail, third one would succeed), but recently I accidentally touched the ...
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18
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Moving RAID1 of ServeRAID M5014 to mdadm
We have an old server, which installed a RAID card ServerRAID M5014 (LSI megaraid compatible), running RAID1 with 2 hard disks. Recently this server was broken, and we found a new server to operate ...
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103
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Ubuntu Server Cannot start dirty degraded array
I have a HP Microserver at home for personal use (hosting music, pictures, videos that can be accessed from any device in the house) running Ubuntu server with a software RAID. Issues started last ...
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Windows storage spaces not showing drives [duplicate]
I am trying to create a Raid 5; it should be trivial.
Three Toshiba 2TB external drives through a USB Hub, one SSD external.
The OS is Windows 11 Home.
Storage spaces show only the SSD when try to ...
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1
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34
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Migrating to a bigger hard drive with RAID
I have my desktop computer with a software RAID 1 that I have built few years ago. It was created with the Intel Rapid Storage Technology software. It is working ok, but space is running out.
The RAID ...
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One software (mdadm) RAID array from 2 separate controllers?
I have a motherboard with two sets of four(4) SATA ports. One set of four(4) is part of the Intel Z270 Chipset. The other set is on an ASMedia chip.
I need a RAID5 array with at least five(5) HDD's ...
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1
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What are potential dangers of spanning ZFS RAIDZ over different size disks?
I am redesigning my homelab servers from scratch, and I want to give ZFS a try after some experimentation I've done in a VM.
I know there is a limitation - disks in vdevs must all have the same size (...
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228
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Move an existing software RAID 1 from one PC to another
I have PC with W10 installed on a separate disk and 2 other hard disks configured as software RAID 1(disks mirrored).
I need to move the two hard disks configured as software RAID 1 to another Windows ...
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3
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879
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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 ...
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75
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Migrating between BTRFS Profiles and mdadm RAID
I am planning to set up a home NAS. I plan to start it with two identical disks in something similar to RAID-1, but Iʼm thinking about how to make sure I leave my options open for growing it later.
...
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73
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2 Disks Suddenly Showing as Spares on Raid 5 Array
I have a raid5 array in a Seagate Blackarmor 440 nas that suddenly started showing disks 1 and 4 as "failed". I moved all of the drives over to a Ubuntu box and tried to assemble the array ...
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52
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Restoring a veracrypt volume
I had a great idea at one point, creating an asus motherboard raid 0, where i ultimately installed windows too (yes i know). One of the M.2 ssds, started failing and i had to reinstall everything.
...
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136
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How to recover RAID 1 array from a single device during reshape?
I have one disk that is in raid 4 reshaping from a previous raid 1. According to examine mode by mdadm, the disk is marked as a spare in a raid 4 array of 3 disks. I was hoping to recover data on it ...
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1
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72
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Getting rid of "Current pending sector" in Microsoft dynamic drive member without resynching to another disk and erasing it
I've got an issue with drive - current "current pending sectors" count is equal 15. I think that it might be only a result of a broken SATA cable, which I've got rid of today.
Long story ...
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Why are random writes to an MD RAID 10 extremely slow (12.5 MB/sec)?
I've just run a fio test against a 6-disk level 10 MD RAID of SATA 2 drives (WDC_WD5003AZEX; 500 GB each) on an OpenSuSE 15.4 machine powered by an Intel(R) Xeon(R) CPU E3-1231 v3 @ 3.40GHz and ...
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Recover a RAID5 logical volume with two failed devices
before bashing me I assure you I know a RAID5 devices can survive only one drive failure. So... why am I asking this?
I had two disks disconnected simultaneously from my machine, so raid failed. Also ...
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1
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710
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How to wait for mdadm RAID1 resync process to fully complete?
I currently have a logic to wait for the resync process to finish by looking at /sys/block/mdXXX/md/raid_state to be clean and assume that the resync has finished. However, I don't think this is ...
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How do I eliminate file write latency spikes on mdadm raid0?
High Level Problem Summary
We are working on an application that requires high throughput to RAID0 for extended periods of time. There are up to 8 independent 5 GB/s data streams being written to ...
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3
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Creating Mirror (RAID 1) on Windows 10 causes not enough disk space error
I have 2 disks (disk 1 and 2), both are exactly 2794.52 GB.
Disk 2 is formatted and contains important data,
Disk 1 is unallocated.
Note that I cannot back up my data and format Disk 2 due to the ...
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1
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1
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367
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Windows Storage Spaces 2-Way Mirror behavior in case of a faulty drive
Assuming a simple, fully-provisioned two-way mirror Storage Spaces setup on Windows 10/11, how does it behave when one of the drives gets faulty:
One of the drives cannot read some sectors, and SMART'...
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1
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1
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478
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Is it safe to use Windows 11 Mirror Storage Spaces with BitLocker Auto-Unlock
There have been reports from a few years back (albeit both about Windows 10, not 11) regarding some issues / incompatibilities that lead to data loss / corruption of using Windows Storage Spaces where ...
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208
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Best way to use Windows' RAID 1 to have an hot backup
I'm looking for a way to direct Win10 Pro RAID system to direct the reads to the fast drive in the mirror
I'm on Windows 10 PRO and have regular (but not too frequent) backups of my system.
The system ...
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1
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Could someone, anyone, help me rebuild my RAID 10 array please?
A little background information just to help (hopefully)... I was doing a backup from my Synology box over the weekend and all was going very well up until Sunday morning when I've tried to re-connect ...
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Cannot understand disk architecture on Synology NAS RS3412RPxs : is /dev/sdkb3 a physical or logical disk?
I have the following synology RS3412RPxs NAS :
$ uname -u
synology_bromolow_rs3412rpxs
$
with the following MD-RAID array rebuilding /dev/sdkb3 on the RX1211rp-1 extension unit :
$ sudo mdadm -D /...
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Assemble raid6 array from spares only
This question is related to Managing raid6 device with pacemaker, but nothing in the question linked is relevant to this question, except the fact that Pacemaker is involved.
For the purpose of this ...
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1
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119
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Managing raid6 device with pacemaker
I am setting up 4 hosts, each exporting one local storage device over iscsi with target. Every other hosts imports it such that each host has concurrent access to all 4 each storage devices. I built a ...
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0
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977
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Ubuntu Server mdam device disappeared after reboot
I have a server (Ubuntu 22.04 LTS) running a software RAID 1 with mdadm, consisting of 2 WD Red disks. After booting the server, a Windows client couldn’t find the Samba share. I logged into the ...
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2
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Does multi storage pools make sense to avoid more damage from a bad disk?
I am a beginner of NAS(and its hardwares), and I get some basic knowledge about RAID from Synology's guidebook. There are many tutorials taught me how to use my hard drive devices to create the ...
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1
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1k
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Re-adding disk to md raid fails
I have a problem with a Linux software raid and don't know what are the next steps to overcome this.
It's a Raid 1 of several partitions. After an unclean shutdown the raid started unclean degraded ...
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1
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239
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Setting up External Storage for Micro Server
Need advice on a relatively cheap and stable way to set up external drives with an Optiplex micro. I upgraded my old homelab server (i5 with ZFS RAID 1 over SATA) to an Optiplex 5060 micro. Optiplex ...
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256
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Where can I see Intel® Virtual RAID on CPU logs on Windows Server 2019 and check if there is any error on any Raid 1 disks?
I have the below system and i noticed that it is repairing the raid right now.
I want to be sure that there is no bad sectors on any of the raid disk but I don't know how can I do that
Here all the ...
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261
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How to deal with LVM RAID mismatches – are there benign causes?
I employ LVM with raid1 volumes both at home and at work. One of the disks in my home server has been starting to report S.M.A.R.T. selftest read failures. Looking for ways to investigate the severity ...
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2
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1k
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Expand or shrink striped array in Windows?
I plan to replace 2 of my HDDs (let's call them A & B, they're not in RAID) with 2 larger HDDs (C & D) in software RAID 0 (Striped volume in Windows). The one problem I have is that my case ...
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How much space does a Linux software RAID1 REALLY occupy on its component devices?
A precise answer to this question is important when shrinking the array and its components.
As an example, I have a RAID1 /dev/md0 set up on two partitions, /dev/sda1 and /dev/sdb1.
Both fdisk and /...
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Determine why drive was removed from software RAID array and rebuild safely
I have a fairly large Linux software raid6 array, with 16 devices. Recently I noticed that a drive appears to have failed out of the array:
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [...
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2
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How to identify physical disks in Linux RAID
Is there a way of reliably being able to tell which physical drive in a RAID relates to the software device name given to it by the OS?
I have a RAID5 array of consumer-grade USB disks (and one spare) ...
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1
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157
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How to use a very slow HD with a fast HD as if it were just one
My problem is quite specific:
I need to run an application that has 500 GB but I have two HDs: a fast 200 GB and a very very slow 2TB.
The 2TB HD is external USB and was mounted over the network (NFS) ...
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1
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823
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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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189
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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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2
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4k
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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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0
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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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0
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1
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210
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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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