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Questions tagged [software-raid]

RAID solution handled by the operating system.

1
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1answer
30 views

Centos 7.6 RAID5 physical system will not boot after single drive failure

Hello, I recently built a Centos 7.6 server with 4 identical 500GB drives, using the Anaconda installer from a local Centos 7.6 DVD. The BIOS settings give me EFI rather than bios boot. Using "...
0
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1answer
34 views

Reconnecting secondary DRBD node

I have set up test DRBD installation succesfully, with switching, synchronization etc working correctly. But I also wanted to test the reliatbility of the setup, so I gave it a good "trashing" like ...
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0answers
5 views

Failed GPU passthrough using Unraid 6.6.6 [migrated]

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 ...
7
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3answers
615 views

Amazon AWS Ephemeral disks and RAID1

Some AWS instances have "ephemeral disks" attached, which are much faster than EBS. But ephemeral disks will be blank and uninitialised when your instance is stopped and started. The data on disk ...
1
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1answer
22 views

Tests with smartctl vs smartd

I am looking into setting up smartmontools. I'd like to control when the tests run. I was thinking of running: /usr/sbin/smartctl --test=short /dev/sdX (every week) /usr/sbin/smartctl --test=long /...
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1answer
25 views

transfer raid 0 array from freenas to windows

I have three disks in raid 0 with some data on it (not mission critical). This pool was created on a freenas installation and I was wondering if there is a way to re-mount the same raid 0 array in ...
1
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1answer
110 views

Reasons to run a software RAID in a linux server running in VMWare

I discovered that one of our servers runs in a VMWware virtual machine and it has a software RAID. The admin is not reachable during the next days. I think a software-raid in a VM does not make ...
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0answers
48 views

Software RAID missing after replacing motherboard - how to restore?

I had a perfectly good software raid (md0) on my Linux Mint 19 installation. I replaced the motherboard, using the exact same drives as before. However, now the RAID doesn't exist and won't assemble....
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1answer
49 views

Something looks wrong in this Linux RAID

This Ubuntu Server 16.04 machine has these disks: sudo fdisk -l Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): ...
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0answers
17 views

RAID : Why does out of sync happens?

I have a system running Software RAID 10 with 4 drives (only one partition is using RAID from those disks). The system, which is running Ubuntu 14.04, was unable to boot. Troubleshooting the problem, ...
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0answers
33 views

Delete RAID 1 partition and grow another

I want to remove a software RAID 1 partition (md0) and grow the (md2) partition with the empty space without loosing md2 data. I was searching around but I'm not sure which is the better way to ...
0
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1answer
94 views

SnapRaid scrub shows tons of data errors on parity drive

I am new to SnapRaid and wonder what is wrong when all scrub runs look like this: ... Data error in parity 'parity' at position '11242042', diff bits 1048371/2097152 Data error in parity 'parity' at ...
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0answers
70 views

ZFS Faulted Pool Corrupted Data, resilver completed, incorrect paths, io error

I recently encountered a disk failure, for which I got a replacement disk, and successfully replaced the disk as well as completed the resilvering process. I was able to use the raidz2 without issues ...
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0answers
30 views

How to force raid1 mirror to stripe on read

I use RAID1 - mirror long time. I have beleaved yet, that RAID1 does stripping on read operation for improve the speed. While migrating form 160GB disk to 3TB mirror, I started the file copy, ...
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1answer
53 views

When you format a RAID array using mdadm do you lose all data on the primary hard drive?

I'm trying to create a software RAID array using my computer, which has 200 GB free space, a 1 TB USB external hard drive, and a 2 TB USB external hard drive using mdadm. These directions instruct ...
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1answer
100 views

Raid 5 the hard disks on Hetzner

Hi ordered a server from Hetzner and added a 500GB SSD to the server. Ran the installerimage and Im not sure Software Raid is working on all three Hard Drives of mine. How can I add Soft Raid to the ...
16
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4answers
2k views

Low-end hardware RAID vs Software RAID [closed]

I want to build a low-end 6TB RAID 1 archive, on an old pc. MB: Intel d2500hn 64bit CPU: Intel Atom D2500 RAM: 4GB DDR3 533 MHz PSU: Chinese 500W NO GPU 1x Ethernet 1Gbps 2x SATA2 ports 1x PCI port ...
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3answers
54 views

Difference between software and hardware RAID 10 if the server suddenly shut down

today I have a question that I can not answer. Our servers are dual power and battery. The operating system never crashes. (thanks linux) Now, I wonder what happens if the server suddenly shuts down?...
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0answers
28 views

How to setup bootable RAID 0 on remote server

I have a remote server with 2 identical 500Gb SSD, sda and sdb. A rescue mode is also available from the cloud provider's interface. How to get Debian installed on a bootable RAID 0? I understand I ...
1
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0answers
13 views

Removing failed Raid0 volume from CentOSv6 boot sequence

I need help. To date the majority of my Linux 'software RAID' use has been done via the Graphical Installer. Now, one of the drives comprising my RAID-0 volume has failed and at boot, the system ...
0
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4answers
75 views

Raid 1 with 3 disks of different sizes

I'm new to this site. I am currently configuring a server, which has these ssd disks: 1X1TB SSD NVme 2X512GB SSD NVMe Now I would like to create a raid 1 between these disks, in which I would always ...
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1answer
46 views

(Why) Does lvmraid6 need 5 drives?

I'm investigating using LVMRAID instead of MD+LVM. In my case, I'm looking at a RAID6. As expected, the docs say you need N+1 devices for RAID5, and a minimum of 3 drives. The docs say for RAID 6 ...
1
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1answer
57 views

Software RAID 1 Failure

I have a software RAID 1 setup on CentOS 6.9 with two HDDs (SDA & SDB). SDB's smart self-test began throwing errors this week: Device: /dev/sdb [SAT], Self-Test Log error count increased from 0 ...
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1answer
229 views

Poor write performance of software RAID10 array of 8 SSD drives

I have server with Supermicro X10DRW-i motherboard and RAID10 array of 8 KINGSTON SKC400S SSDs; OS is CentOS 6 # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdj3[9](S) ...
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0answers
6 views

SW Raids 50 - global hotspare

Is it possible to set-up global hotspare the same way HW Raid controllers has them, so for all Raid pools? Iam having SW raid storage with 7 raid0 over 3x4 raid5 pools. Other storage is managed by HW ...
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1answer
165 views

Windows Server 2012/2016 simulated RAID6 in software with 4 disks

Does anyone know how to emulate RAID6 in software on Windows server using 4 disks? The solution must provide for the failure of any two disks (like RAID-6 in Linux). Thank you, Joe
0
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1answer
64 views

if motherboard fails, SSD on Raid array can be used in another

I have two Servers of different motherboard but same CPU architecture and lithography. I have setup raid 1 in both Server with 2 SSDs in each. Server 2 is for backup and snapshot purpose. If server ...
0
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0answers
39 views

Messy RAID Array creation Needs Clean-up

I'd like some help to understand problems I am currently experiencing with a RAID 1 Array, created from Intel RSTe and managed with mdadm. Overall RAID 1 Configuration Both /dev/sda and /dev/sdb are ...
1
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0answers
73 views

Debian software raid 50

I was given task to build large SW RAID 50 array on debian 9. Since now i was using mainly HW controllers to do so, which managed a lot of by them selfs. I have few question now I managed to build ...
0
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2answers
29 views

Reading hardware-raided disks with software raid

I have a computer with 2 disks on it in RAID 0. Unfortunately this PC just died yesterday and I need to get a VM out of the disk to transplant it in another computer, but I'm not sure if the raid ...
2
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2answers
88 views

chkdsk - ok to run on a Softare RAID1 (Intel RST)?

I am running automated backups on a Windows Server 2016 since a couple of days. We are backing up the System as well as an entire Volume which contains the Server Folders. This Volume is a Software ...
2
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1answer
43 views

How to migrate from mdadm to storage spaces?

I have: Debian linux server 4 TB 3x(2TB drives) mdamd raid5 with EXT4 filesystem. I want to upgrade it to: Windows server 2016 with storage spaces - 6TB(2 x 6TB drives in mirror) NTFS. What ...
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2answers
496 views

Hetzner's installimage script, RAID1 hard drives + SSD

I just purchased a server from Hetzner, with two 4TB hard drives and one 1TB SSD. I want to setup the two hard drives (/dev/sda & /dev/sdb) in RAID1 and install the OS on them, and have the SSD (/...
0
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1answer
241 views

Btrfs with different sized drives and parity

I want to upgrade my NAS to 8x 4TB + 4x 2TB drives and wonder if Btrfs can deal with drives of different sizes and still provide reduncancy. If one drive fails I do not want to loose my data! So does ...
0
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1answer
26 views

Will I lose data on the disk if I add it to a RAID array on a PERC 6/i?

I am trying to figure out if I can move disks from a Linux software RAID to a hardware RAID on PERC 6/i - and preserve the existing data on the disks. Is it possible to preserve the existing data?
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3answers
434 views

Disabling ext4 write barriers when using an external journal

I'm currently experimenting with different ways of improving write speeds to a fairly large, rotating disk-based, software-raid (mdadm) array on Debian using fast NVMe devices. I found that using a ...
1
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1answer
210 views

How to recover data - from Software RAID1 - MBR is lost on both drives

I'm trying to recover raid1 array, both disks are NVMe flash drives. I did really stupid thing in the end of long and bad day - erased first 512 bytes of each NVMe drive - the intention was to ...
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1answer
131 views

Recover RAID 1 after unclean unmount

I have two drives in my desktop in RAID 1. My computer locked up on me yesterday, so I used SysRq REISUB for a "safe" restart. When the machine booted back up, I realized there was no data on my RAID ...
2
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1answer
61 views

Windows OS reinstall on Mirrored disks. Old disks are “pack is not online” [closed]

I was having issues with a Windows Server 2012 system, and decided to re-do it. It had two each of SSD and HDD with both being mirrored sets. After a fresh install on one SSD, Showing up in "Disk ...
2
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2answers
492 views

Why does my supposedly hardware-based RAID appear as a “fake raid”

I have a low-end server for a SOHO set-up: a Gen8 HP Microserver. It has a built-in Dynamic Smart Array B120i (RAID) Controller. When booting the server up before any OS was installed I was able to ...
8
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2answers
147 views

Storage server - Swapping SAS HBA card for a different model

TL;DR Server's original SAS HBA (PCIe card) does not support transparent passthrough, which is desired, as I want the OS to manage the disks (ZFS). At my company, we have an Intel SSR212MC2 server (...
0
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0answers
62 views

Recover data from a Linux software RAID1

I get a new customer with a failed old server (it does not boot anymore because of a failed CPU). Unfortunately the customer does not have a backup and I am trying to recover data from the hard ...
0
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1answer
341 views

software raids and kvm

I have 4 drives for data storage, that i want to arrange in a software raid 10 (hardware raid is no option). I was asked to set all things up in a vm, so it is easier to change the hardware, if it is ...
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0answers
67 views

md RAID1 / ext4fs corrupting during nightly SMART self-test

I'm having this strange issue where my root-mount filesystem is terminally corrupted and auto remounted read-only seconds after a nightly S.M.A.R.T. short test begins. The filesystem is ext4 on top of ...
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0answers
181 views

RAID 10 + bcache + LVM

I'm planning to setup a new RAID 10 array using Linux mdadm with bcache and LVM. The way I think about it is that first I create the RAID 10 array then I use the array as a backing device for bcache ...
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0answers
19 views

Recovering software raid after a hardware raid array was created on the disks

I had a server with 4 x 500GB SSDs in a software RAID10 array. I moved these drives to a new machine that had an HP P410i Hardware RAID controller. I didn't want to use the hardware raid controller, ...
0
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0answers
28 views

failed to add member /dev/sdh to md array /dev/md/127_0: > mdnominate failed for /dev/sdh, what could be possible wrong with this sata disk?

failed to add member /dev/sdh to md array /dev/md/127_0: > mdnominate failed for /dev/sdh, what could be possible wrong with this sata disk ? whereas with another smiliar hardware having the same ...
1
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1answer
74 views

Teaming a drive in multiple RAID groups [closed]

I've setup a home RAID for a friend in the past from a heap of old and new 2T and 3T drives. seems very much like what BeyondRAID does. I made a 7 member RAID5 group of the 2T volumes and the first ...
0
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1answer
57 views

Is it possible to extract Raid Controller configuration index from on to another?

We have a Fujitsu server with this specific RAID Controller (FUJITSU PRAID EP400i / EP420i). We want to export the configuration of that RAID Controller to a new one, so in case that RAID controller ...
0
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1answer
243 views

Incredibly slow transfer rates to/from vm

Recently I set up a software raid on Ubuntu (which is on an SSD) using Webmin which worked fine and is also fast. I left some space on the SSD on which I installed a Windows 8.1 Pro vm using virt-...