Questions tagged [software-raid]
Questions which refer to software RAID implementations.
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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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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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Wildly varying throughput
I did some test with various raid setups. For all of them, I created everything (e.g. volume group, logical volumes, etc) with default values, no modifications.
I am having trouble understanding
LVM ...
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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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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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Is it possible to recover a 4-disk MD RAID 6 when there are no remaining superblocks
My system rebooted this morning and every disk in my RAID6 was suddenly blank. I have made a series of mistakes that made everything worse. I do not have backups as I cannot afford the hardware needed ...
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mdadm.conf not applied to RAID 1 volume Ubuntu
I run a server under Ubuntu 22.04 LTS, on which I have a RAID 1 volume which I re-installed from a previous server installation (on Ubuntu 20.04).
Here is the interesting part of my mdadm.conf
ARRAY ...
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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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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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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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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:
stiltzkin:~/ $ cat /proc/mdstat
Personalities : [raid6] [...
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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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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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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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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 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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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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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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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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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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