RAID 1 is the official name for mirrored disks or volumes

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Raid Configuration lost After For Installing Windows/Formatting Hard Drive on reboot

My boss recently got a tower fujitsu server, I dont know the model because it is written in Chinese. I installed windows server 2012, activated hyper-v and even installed ubuntu as a VM and ...
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30 views

What is the best way to create RAID 1?

I'm looking for a way to create the RAID 1 array without losing my data on CentOS. Here's my situation: I've got a web server running on CentOS. There is one VG partition with few LV volumes. I bought ...
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22 views

how to use Intel RAID 1 on windows 7 boot drive

I have a motherboard with Intel RAID. and 2 new and empty 1T HDD. I want to use 2 HDD as RAID 1 (Mirror) to install Windows 7 pro (C: drive). What is the best or correct way to do it? I have ...
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55 views

Single-bit error on RAID device?

For the first time since I've owned a PC (30 years) I have experienced an undetected, uncorrected single-bit disk error. In a RAID array. The sequence of events was Upload a collection of digital ...
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22 views

How to read data from a Raid 1 drive

I have a Sharecenter NAS with two hard drives in it setup in a Raid 1. One of the drives has failed (making noise) and somehow so has the Sharecenter. I have a SATA-USB thing but my Win8 machine ...
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33 views

P8P67LE Motherboard - SATA MODE RAID; Create RAID 1

As it seems my ASUS P8P67LE motherboard has built-in RAID capability. My OS is previously installed in normal mode and in BIOS setting SATA MODE is set to AHCI (Advance host controller interface) ...
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37 views

RAID 1 scalability [closed]

Assuming I'm in a home environment and I want to keep my data secure, how would I build an expandable custom NAS? I can't afford a real SATA/SAS controller. I'm thinking of a scalable array of RAID 1 ...
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44 views

Usability of solid state drives after long term storage without without power

So, I was recently hired on to a company that has shipped out several 24/7 always on servers.. With solid state drives. I understand that SSD longevity has been improved upon, however to my knowledge ...
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40 views

Multiple disk controller cards and RAID1

I'm creating a btrfs RAID1 array, and I have two SATA3 controllers - one on the motherboard and another in a PCIe slot. For simplicty's sake, let's say I only have two drivers, sda and sdb. Would I ...
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28 views

RAID array failure. False positive?

Background: I have 3 storage units in my PC: an SSD that contains my operating systems a 1TB hard-drive that is about 5 - 6 years old a 1TB hard-drive that is only a few months old The 2 big ...
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56 views

is it okay to mirror/raid1 different hardisk model in freenas

In my freenas system, I have several volumes running, one of them is consist of 2 3TB WD RED with different model (I forgot the serial, but they are different). Both are set up in a single mirror ...
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24 views

Best RAID Solution for dual boot?

I've seen this topic talked about before on this site but with other users using 2 drives for the active partition (booting from the same HDD thats got RAID) however my situation is a bit different. ...
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58 views

Data loss warning rebuilding RAID1 logical drive

I have a Windows 7 Pro server running RAID1 and from the log, it appears that it 'lost' a drive for a few seconds and now thinks that the RAID1 has failed. I assume it needs rebuilding, which I ...
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89 views

Server has Crashed, How to Recover My Data from Raid-1 Configured HDDs?

I was using HP ProLiant ML150 G6 with Windows Server 2008 as File Server. Server is configured with 4x250 GB RAID-1. All of a sudden electricity fluctuates and the server got crashed. Now it turns on, ...
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282 views

Does windows 7 disk manager mirror disk or partitions?

My servers Raid 1 disappeared when I did a bios update, And now in order to get it back I have to format my 2 * 3tb hard drives. Which isnt really a solution for me. So I have desiced to try and make ...
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44 views

Is it possible to build RAID0 or RAID1 using 2 disk when one disk is not cleen?

I'm using win 7.Is it possible to build RAID0 or RAID1 using 2 disk when one is not cleen? I have 2 same hdd disks, one of them cleen and one with data. I want to build RAID0 or RAID1 (on the fly) ...
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149 views

Fedora 20 stopped booting after migrating to RAID array

I have decided to migrate my working Fedora 20 installation onto RAID-1 software array. After this operation, I have a problem with booting my system. Background My machine is MacBook Pro (Early ...
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70 views

RAID 1 without cache protection - ZMCP/backup battery

I'm running RAID 1 on an Adaptec 6405. I'm trying to decide if I need to install the ZMCP on the card to provide Cache protection. Adaptec's ZMCP is the equivalent of a BBU - battery backup for the ...
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575 views

Understanding /proc/mdstat [U_] VS [_U]

My server is set up with raid1. A few nights ago sda fell out completely and data was corrupted. I replaced the drive, cloned the partition table and added the respective arrays. While adding sda3 ...
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1k views

How do I recover data from only a single drive in RAID 1 setup on Synology DS214+ NAS?

I'm doing this so I know how to recover my data in case the NAS itself dies out and I'm only left with just a single drive from the 2nd bay (or from the 1st bay). Setup Synology DS214+ NAS 2x 4TB ...
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118 views

Can't add drive to mdadm RAID1 array

I have a mdadm RAID1 array in a production server. SDA fell out and when trying to re-add SDA3 to MD2 I think it failed. The syslog shows: [28375.974199] sd 1:0:0:0: [sdb] Add. Sense: Unrecovered ...
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btrfs does not show drive as missing

I am trying out btrfs and I noticed some funny behaviour: I have two drives in a raid 1 configuration. sudo btrfs fi show Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f Total devices 2 ...
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extremely long reconnect time to network share

In the past I had used an iOmega and a Seagate Black Armor NAS, both run Linux, both ran perfectly fine until they eventually died. I next switched to an Apple TimeCapsule for both network storage and ...
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172 views

Is Btrfs vulnerable to RAID write hole effect?

If not, does it mean that Btrfs in RAID mode is fully resistant to power failure?
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124 views

Can I convert a RAID1 disk to non-RAID under Windows?

I have a two-bay NAS on RAID1. I'm having problems accessing the NAS, and as a precaution I'd like to save the data elsewhere. I tried plugging one of the drives in my Win7 PC. Windows sees the drive ...
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169 views

RAID1 drive failed; partition missing after reboot

I think I shot myself in the foot here, but let me quickly divulge what's happened: Intel Matrix Storage Manager started reporting that one of the two disks I had in a RAID1 array configuration had ...
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462 views

How to create a software RAID-1 array on Windows 7 not spanning whole disks

I have a brand new PC dual booting out of a single SSD drive (win7+debian). I added a couple of 2T hd I want to use from both Win & Linux. My target is to have two separate RAID-1 arrays on four ...
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51 views

Recovery of RAID1 After converted to AHCI

I recently made a machine for my brother with a 500 GB solid-state for the OS (Win8) and two 1-terabyte hard disks in a mirrored RAID for separate file storage. A few weeks ago having the mirrored ...
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123 views

How to limit bandwidth (file sync) to a specific windows file share (smb - raid1 backup device)?

So I decided that I needed a Raid1 backup device for the home. Mostly to backup documents and media. There will be about 3-4 Windows systems in the household that would sync files to this device. I ...
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209 views

re-add to RAID1 is not possible

On Kubuntu 13.10 I have two hdd: sdb 1TB with two partitions - one in RAID1 and second is simple. Second hdd sda 500GB is whole in RAID1. Once I unpluged second hdd, put there some other hdd ...
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172 views

Repair partition table for disks in a RAID1 array

Here's my problem. I have several arrays. RAID1. I've scanned each drive that's part of an array with gdisk and it reports problems. One array (2 drives) has a damaged GPT partition table and a ...
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What are the risks of running a software RAID 1 array in degraded mode?

I'm replacing my workstation's system drive and would like to in the future be able to easily add a second drive to form a proper (although software) RAID 1 mirror. For the time being, however, I'm ...
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209 views

Super slow SDD write speeds with RAID 1

I have a very new computer system, configured in RAID 1, but was surprised that the write speeds were extremely slow! Here is a snapshot of my computer setup: Motherboard: Asus Z9PE-D8 WS ...
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490 views

How to use Hardware RAID in Ubuntu Server

I have an Adaptec RAID-Controller and created an RAID-1(Mirroring) succesfully. Now I have installed Ubuntu Server 12.04.3. When I type fdisk -l I get this output: bf@fileserver:~$ sudo fdisk -l ...
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63 views

Intel RST accidentally selected wrong drive as system drive — how to fix?

Question / TL;DR If Intel RST has marked a drive other than my RAID set as the system drive, how can I get it so that the RAID set is now seen as the system drive, and catch it up to my drive now? ...
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118 views

Debian/3ware 9500 - RAID Failure?

I swapped the hard disks from my home server into a new case last night (new mobo/CPU/RAM) and transferred its 3ware 9500 PCI-X SATA RAID card with it. The machine has 4 disks configured in 2 RAID1s - ...
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807 views

Have two partitions in RAID1

The answers are unclear wherever I look. I have two 2TB drives for a RAID1 and I want to mirror them while having two partitions on the drives. One partition will be 100GB and contain programs, the ...
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40 views

Ubuntu RAID hardware update

I have a RAID1 (Intel Raid controller), but I have more 2 slots in my server and I'll put there more 2 disks to create another RAID1. I never did it, the only thing I did is simply add standalone ...
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65 views

Is linux LVM a good choice for 2 disks ? [closed]

I am installing ubuntu server 13.04 on a machine. I have 2 devices (hard disks) on it: 2 x 500GB on RAID 1 1 x 1TB I was thinking about setup LVM, but I have no idea about how it works or if it's ...
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975 views

RAID1 w/Intel RST — can I replace failed drive with bigger drive?

The Setup I have 2 x 1TB drives in a RAID1 configuration. One of the hard drives has failed and so my RAID situation is degraded. All data is backed up via Backblaze as well so I'm not worried about ...
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RAID-1 causes far more noise than non-RAID?

After moving two 2 WD 1TB Black drives to a hardware RAID-1 system on my GA-Z87X-UD3H Gigabyte motherboard they started making a lot of noise and rattle. I've tested both of them separately in a ...
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How to undo accidental RAID initalization operation (recover data)? [duplicate]

Summary of the problem: I have two disks re-configured as RAID 1. instead of copying the data to the empty disk, it deleted the data from the non-empty disk. Here's what happened: 1. In the last ...
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103 views

How to undo accidental RAID initalization operation (recover data)? [duplicate]

Summary of the problem: I have two disks re-configured as RAID 1. instead of copying the data to the empty disk, it deleted the data from the non-empty disk. Here's what happened: 1. In the last few ...
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314 views

Installing Fedora 19: only shows one SSD of two

I'm trying to install Fedora 19 on two SSDs (Software RAID 1 if possible). These SSDs were used in another computer before. I deleted the MBR record and the partition table with dd if=/dev/zero ...
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286 views

Running multiple RAID-1 arrays on the same server

Is it possible to run multiple RAID-1's on the same machine? I have the following Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813182251 Would I need to get RAID cards?
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Can a secondary SATA drive under Win 7 Pro software RAID 1 mirror be boot-able with no hassle?

Using Windows 7 Professional software RAID 1 (Mirror) of two identical SATA drives is it possible in the event the primary drive fails that the system may boot off the secondary drive without doing ...
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696 views

D-Link DNS-320 Degraded RAID-1 will not rebuild…? any suggestions?

I'm not sure what caused it but it just keeps looping the rebuild process. Gets to 100% of re-syncing and then starts at 0% again... Just interested in a solution but not finding anything with ...
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382 views

md0 RAID1 can't read superblock

i have a problem with my md0 array, which is an raid1 (2 mirrored USB-Sticks) Mount gives "Can't read superblock" cat /proc/mdstat: Personalities : unused devices: <none> fdisk -l ...
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168 views

Can't format hard drives under RAID-1

I have a Gigabyte GA-EP45 extreme, which contains a "Intel Matrix RAID controller". On lspci outputs as: RAID bus controller: Intel Corporation 82801 SATA Controller [RAID mode] I bought two ...
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242 views

Replacing a disk in RAID1 on a mac 10.8 system

What is the proper and safest way for replacing one of the disks in a RAID 1 array (mirrored) on mountain lion? Both disks are currently OK but one of those drives is much older than the other. ...