Questions tagged [raid-1]

RAID 1 is the official name for mirrored disks or volumes

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Dell Xe2 Win 7 Pro Intel rapid storage technology version 12.6.0.1033 how to change partition sizes without loosing data

I have a dell xe2 with windows 7pro X64 SP1 (Build 7601.24136) installed. it is configured to be RAID 1 with 2 partitions C: configured as 100gb D Partition configured as 1.55 gb formatted NTFS. ...
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Would a small Raid 1 setup suit the need of a home user?

First of all I have read a few discussions about how raid is not a backup option, but let's say I ONLY want to try to protect my Datas from hardware failure. Currently, in my gaming pc, I have a 1 TB ...
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RAID1 default disk capacity is lesser than the disk sizes. Any ideas? Intel RRAID Storage Technology - RAIDfrom Bios

Here the screenshots I think they explains everything The disks are advertised as 1 TB and the real size of the disks are 931.5 GB I have installed Windows Server without RAID setup for ...
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How can I remove RAID 1 on Ubuntu 18.04 server to reclaim storage space?

I have a server with RAID 1 set up, I want more storage by removing RAID 1, but I don't know enough to do this. Please provide commands that will allow me to delete the raid and get 2 disks separately....
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Can I partition a RAID 1 drive to replicate data that is now on multiple drives?

I am getting this Western Digital RAID 1 array (https://smile.amazon.com/gp/product/B074R59TLB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1). Currently I have data spread across three internal ...
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Rebuild RAID with Old HDD in Synology NAS

From a Synology NAS with two bays, one of the HDDs has been removed. The remaining HDD is working fine as remaining part of the degraded RAID 1. Is it possible to re-add the once removed HDD in the ...
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Lenovo Legion 7i not booting after RAID 1 setup

I'm trying to get RAID 1 setup on a new Lenovo Legion 7i laptop using the RAID feature in the BIOS. After I create the RAID 1 volume using Intel Rapid Storage Technology, I add the two disks to the ...
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RAID 1 enabled via Disk Management after setup. Is this a valid RAID 1 mirror of Disk0?

I converted Disk 0 to a Dynamic disk, which was needed before kicking off a RAID 1 Mirror on Disk0 -> Disk1. However, I noticed when I kick this mirror off, it's not the entire drive, but it's just ...
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msi mag x570 tomahawk AMD Raid array gone after BIOS update

I went through and installed newest BIOS (7C84v15), chipset driver and other drivers form MSI website. Because I had problems with my system stability. Upon restarting my PC I noticed that one of my ...
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Unplugging the drives in RAID 1 and boot from USB Linux without using drives

I have three drives in my PC - one SSD with system and two HDDs in RAID 1 for data. For some time I started mining cryptocurrencies a little bit on my PC. Now, I would like to boot my PC just from USB ...
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Convert new hard disk for mirror-ing on existing system

I am trying to make raid1 mirroring on new hard disk, disk1. I deleted partition to make unallocated space, right click on C: -> mirror -> disk1 then I get message "All disks holding ...
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Dual-boot with UEFI/GPT on raid1

The question How to install an EFI bootloader on both disks of a Linux raid1 with Windows dual-boot? Background I have set up Debian on raid1 with GPT and UEFI (boot security disabled). Then I had to ...
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How to read data from a single RAID-1 Harddisk

I had a HP Gen8 Microserver with Windows 7 and two SATA harddisks in a RAID-1 combination. Now this server is broken and I want to read data from one of the hard disks in a normal Windows 10 PC. The ...
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Moving from mirrored dynamic disk to RAID1 storage space

During setup of my gaming PC I created a mirror dynamic disk on the 2 data disks because The Internet suggested it. Now I know this was a bad idea since it de-synchs more often than it should even if ...
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How to get data from RAID1 with Windows PC?

Is it possible to recover RAID 1 data with a Windows PC? My ZYXEL NAS326 died, but both 4TB hard drives are still good. I found this question: Recovering data from RAID1 drive But it is for running on ...
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Why is converting from RAID1 to single in Btrfs an I/O-intensive operation?

I want to replace a device in a RAID1 and converted it temporarily to “single”: btrfs balance start -f -mconvert=single,soft -dconvert=single,soft / This takes very long. I don’t see why, and wonder ...
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How to repair a failed software RAID 1 (mirror) with Windows 10 pro?

I have configured a Dynamic Volume mirror (RAID 1) using two separate drives for data only using Windows 10. At some point, the RAID ran out of sync and never stopped resyncing, so I tried to find a ...
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Intel RST driver downgrade safely?

I have an old z68 system using intel rst, configured with 2 HD in raid 1 and accelerated with an ssd. Through a failed upgrade of win10 from 1903 to 2004, I had to break the raid and acceleration to ...
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Is my RAID Server Configuration working properly?

Can you check my RAID Configuration? I don't know whether it is works or not. Sorry, my knowledge of Linux is low. I don't know how to setup the RAID correctly. But what should I do to make the RAID ...
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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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Is it possible to collapse RAID 1+0 to RAID 10 (single layer) with mdadm?

I've created two RAID 1 arrays and combined them with a RAID 0, and I recently read that mdadm also supports a one-layer-solution for that, is it possible to convert my setup into the one-layer-setup ...
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How to add spare disk to raid1 - Linux debian

I have raid1 with several partitions as shown below in attached image. My question is: How to add a spare disk (sdc) to this raid. I use mdadm tool. Raid1
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Strange missing space on SATA RAID 1 disc in Windows 10

A have windows 10 pro installation(clean install) that was created around 10 month ago(mb ASUS Z87-DELUXE). I didnt notice it in the beginning but the space of one of disc started to disapperaring. My ...
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How do I mirror the boot partition of a Windows 10 version 2004?

I have the following setup: Two identical NVMe disks of about 1TB size Windows 10 Education N version 2004 (latest version as of writing this question as far as I'm aware) A fresh install using UEFI ...
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Stalled RAID 1 -> 6 migration?

I've replaced 2 disks in QNAP TS412 4-bay NAS. The existing 2 disks are RAID 1 and I am attempting to migrate from RAID 1 to RAID 6. Since I started the migration, the NAS has been churning heavily, ...
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Beep while building RAID 1 array

I've built a NAS system using a supermicro superchassis. This chassis has Supermicro CSE-SAS-733TQ backplane supporting 4 hotswap bays. Everything runs OK. I run a fresh debian 10 install. Now I tried ...
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Add a new disk as mirroring (raid 1) to existing disk

I have disk1 with Windows Server OS and all my applications and DB installed and configured. Can I now add a fresh disk (disk2) to this existing disk1 and make it as mirroring disk (raid1) using ...
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Creating a RAID 1 with 4TB hardrives in Windows 10

I have the following set up: Motherboard: Asrock B450M Pro4 1 NVM Samsung 250GB (for OS) 2 identical 4TB Seagate HDH and windows 10 pro My intention is to mount the 2 4TB in a Raid 1 configuration. ...
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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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Can hardware RAID-1 be enabled on an existing Ubuntu 18.04 system?

I have an ASUS Ubuntu 18.04 system running on an M.2 drive as /dev/nvme1n1. I have added an identical M.2 drive and would like to enable hardware RAID-1 (motherboard supports it). The blank M.2 ...
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Is it possible to add aditional disks to LSI RAID1 array?

Just installed a LSI 9750-8i to my old system with Windows 8.1, added two 2TB disks to SAS-0 port, created RAID1 with them, assigned a letter E: and started cloning data to it. Is it possible to add ...
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ReadyNAS RN312 extremely slow on resync

Running a 2 TB RN312 OS 6.10.3 X-raid and it is taking forever to resync a new disk. See below root@nas-D5-DF-E6:~# cat /proc/mdstat Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] ...
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Reshaping RAID-1 to RAID-5 hangs forever

I have a problem with reshaping RAID level 1 to RAID level 5: it's been hanging at 41% for a few days now. Some background (verbose, since I don't know will end up being relevant; apologies). The ...
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CentOS Understanding Failed Software RAID Array

I have received two notifications from our main server today about failed disks in a raid array. This appears to be a software raid setup years before I started at the company by a past staff member. ...
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How does loss of single drive influence 4k random performance of RAID 1 array?

Here is one explanation of the benefits of RAID 1: "As different disks can seek on different data, it [RAID 1] has up to 2x the random read IOPS but the same 1x (or slightly lower, due to ...
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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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Server 2012 RAID 1 drive expansion onto additional RAID 1 disk

I currently have two 500GB HDD set up as RAID 1 on server 2012 via the C100 raid controller. This is disk 0. They are split into C: and D: drives/volumes C: has the OS and program files, D: has ...
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Win 10 boot volume mirror fails: Boot configuration data could not be updated

I'm trying to add a mirror of the C:\ volume in Windows, but Disk Management gives an error: Disk Management The boot configuration data of the system could not be updated. Use bcdedit.exe to update ...
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Linux softraid: Can disk image files mounted via loop device be located on a raid 1?

I want to use a softraid mirror for my new Linux installation (VoidLinux) -- complete mirror of swap and /. Now I also want to mount some directories (e.g. /home) via loop device from a disk image ...
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mdadm RAID underlaying an LVM gone after reboot

The main part of my problem ha been discussed here the other time... ... but I have two special questions that haven't been answered before. The Situation: I upgraded my hardware, installing two new ...
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RAID1 in Linux makes HDD light always on?

I made a RAID1 using two SATA HDD in Ubuntu 19.04 following this guide. It seems to work properly, but once mounted the HDD lights are always on. Is it normal? I only using one half of each disk. ...
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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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Is it possible to run a raid-1 on a 2 hard drive usb device?

I have an Icy Box (https://www.amazon.de/IB-3620U3-Externes-Festplatten-Anschluss-Smart-Lüfter/dp/B00I4E2FYI), which I would like to run a raid 1 system on. But I am curious whether that will ...
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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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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 ...
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143 views

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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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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HDDs don’t work properly with Dell 6/IR Raid Controller

I maintain a Dell PowerEdge T410 (running Windows Server 2019 Essentials) with a SAS 6/IR RAID controller configured with a RAID1 of two Seagate Exos E 7E2 1TB (link to exact specs here) HDDs, which ...
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408 views

Best data security cache settings in windows Intel Rapid Storage Technology for Raid 1 and Raid 0

I have raid 0 - 2 x SSD - used as windows disk raid 1 - 2 x 4 TB storage - used as data backup extremely important I am rather interested in best data security and reliability rather than speed ...

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