RAID 1 is the official name for mirrored disks or volumes

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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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1answer
510 views

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 non-...
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38 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 ...
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1answer
528 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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1answer
397 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 of=/...
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627 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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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 D-Link....
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814 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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412 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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694 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. ...
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189 views

Is `dmsetup remove` safe with respect to contained data?

I have a "lost" SW RAID array as described in this question: http://askubuntu.com/questions/311024/raid1-array-lost-after-upgrade-from-ubuntu-11-10-to-13-04. I have now identified a way to mount one ...
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335 views

Upon reboot, Linux software raid fails to include one device of a RAID1 array

One of my four Linux software raid arrays drops one of its two devices when I reboot my system. The other three arrays work fine. I am running RAID1 on kernel version 2.6.32-5-amd64 (Debian Squeeze). ...
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1answer
124 views

How to image a degraded RAID array

On boot in Windows 2003 I have a message "Raid Array Degraded". When I use F10 to go into the RAID utility I see this screen : After passing through that screen the machine got stuck on reboot so I ...
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1answer
132 views

How can I delete soft/motherboard RAID 1 from a different computer?

I have a drive. It was part of a RAID 1 mirror on a motherboard-based raid controller (nVidia controller on an ASUS A8N-SLI Deluxe), which, if I understand correctly, is considered to be "soft" raid, ...
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How do I safely move a Windows 7 software RAID 1 volume to a new PC?

I have 2 identical drives in an old PC running as a mirror RAID (RAID1) using the Windows 7 software RAID. These drives are data-only drives and are not being used to boot an operating system. How do ...
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284 views

check physical contents of hard disk connected in software Raid 1 / Windows 7

I have two 500GB hard disks configured in raid 1 (mirroring) on Windows 7. It is being labelled as 'Healthy' in Windows. As you know, these are accessed as one partition of 500GB. Is there any tool ...
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1answer
282 views

RAID 1 with ThinkPad T530

A friend of mine has a T530 (I think he bought it last year) and I checked the spec it seems to support RAID 1 (mirroring). He currently has one hard disk running and is considering RAID 1 and is also ...
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1answer
519 views

Adjusting mdadm priority on Ubuntu

I have Ubuntu 12.04 running on my new server, and it is setup to run off of one drive, then 2 drives that are mirrored using mdadm. When streaming files or media from it, it is extremely slow. I was ...
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2answers
1k views

Intel Matrix Storage / Raid 1 / Asus P5Q-Pro

I have configured two 1TB Western Digital Green Hard drive into Raid 1 Array via my motherboard BIOS last month. Everything works fine and all data are copied to array and system works properly. few ...
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Why is Ubuntu 12.10 listing three disks in my RAID 1?

For the same computer that I tried fixing Windows XP on, though the installation was successful, it kept blue screening so I've decided to switch to Ubuntu. The problem is that Ubuntu is also having ...
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811 views

Windows 8 keeps deleting files from RAID drive

I have an ASRock Z77 Extreme4 motherboard with Windows 8 (not Pro). Brand-new computer, built from new parts. I use a 600GB drive (10,000RPM) as boot drive (let's call it HD1) and 2 3TB drives in a ...
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523 views

Hard Drive Slow down.. where do I start?

I just built my first PC less than a month ago. I have a SSD drive with my Windows Operating System on it, and I have two Western Digital Caviar Black 2TB 3.5" 7200RPM Internal Hard Drives (...
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120 views

Can I extend RAID 1 on Debian Squeeze?

I have Debian Squeeze in a RAID 1 on 2 physical 2 TB disks. Is it possible in the future to add two physical disks and extend the RAID 1?
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Cannot read NAS drives formatted for Linux

I have two hard drives (mirrored) in a QNAP TS-209 Pro II NAS box that won't mount properly. They are formatted for Linux (EXT3 file system) and the problem appears to be with the NAS, not the drives ...
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326 views

How to properly change directory structure/mount points for directory?

After several attempts to formalize my problem, I think, I finally managed to do it. What I have: mount -l ... /dev/md123 on / type ext3 (rw,noatime,errors=continue,user_xattr,acl,barrier=0,...
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608 views

Disk space and performance with Raid 0 and Raid 1 [duplicate]

I am buying a desktop from Dell, they have an option 2 x 500GB 7200 RPM 2.5" SATA Hard Drive with Raid 0. I Googled about Raid 0 and found that it provides best performance. But I am confused about ...
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Continious mirroring of the whole notebook hard drive into a file on the exernal usb hard drive in Ubuntu Linux

What I need to have continious mirroring of the whole notebook hard drive into a file on the exernal usb hard drive. Sometimes the external drive could be unplugged. I'm running Ubuntu Linux.
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Windows 7 and software RAID 1 for system [closed]

So I have been using Linux software raid for ages, unfortunately now I need to install Windows 7 on a notebook and since the machine has two disks I was wondering how do I setup software Raid in ...
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257 views

Is it possible to create a RAID 1 array for ubuntu and install xp on a non-RAID part of the drive?

I was wondering if it is possible to setup a hardware RAID 1 array on 2x1TB drives for the installation of Ubuntu 12.04 whilst leaving some space free outside of the RAID array to install Windows XP ...
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Use Intel Rapid Storage Technology with a secondary PCIe RAID card

I have Intel's RST on motherboard using RAID1 (2x2TB) and a boot drive. Trying to add another RAID1 (2x3TB) has failed since RST is limited to 2.2TB for RAID1. Now I've bought another RAID card in ...
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681 views

Cloning Ubuntu mdadm RAID1

I would like to clone a pair of RAID1 drives created with mdadm. I've tried Clonezilla, but there's no native support for mdadm, so it resorts to using dd which is incredibly slow. I've looked for ...
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Are there any good software-based RAID 1 mirroring alternatives to Windows 7 Computer Management?

I only have Windows 7 Home Premium, not Professional, so the mirroring option isn't available in Computer Management. Are there any good alternatives? It's possible RAID 1 is overkill for what I'm ...
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1answer
963 views

Two NAS devices or use a RAID-1 [closed]

I hope this is the right place to post this question. I've been searching for a while, to find an answer to this. I'm trying to find out what is a better approach for our household. Buy two NAS ...
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How to recover deleted files on Iomega NAS ix2-200 CloudEdition - Linux based system with Raid1 and JBOD

I deleted some video files by mistake on my Iomega NAS ix2-200 StorCenter Cloud Edition. Linux based system with Raid1 and JBOD I stopped writing any action on the StorCenter. How can I recover these ...
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How to create a mirror (raid-1) of an already setup and running ubuntu 12.04 system?

I have a fully setup ubuntu 12.04 installed on a single drive and formatting it just to setup raid-1 is not an option Unlike other answers like this one: Ubuntu 12.04 - Add RAID 1 Array on existing ...
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Putting two physical hard drives in a single 2.5" bay?

My crazy brain came up with this ridiculous idea. "Why can't I have a single 2.5" drive device that actually contains two independent hard drives? I want RAID 1 data mirroring and the security of ...
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Why does an Intel RST RAID 1 array write faster with write-back cache disabled?

I have two HDDs (5900 RPM) in RAID 1 (mirror). I know, I know, it's painfully slow. I'm currently in the process of replacing them with faster drives, hence this question while I'm testing things. ...
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3answers
357 views

How to set up 2 RAID 1 HDDs? [closed]

I have a home-server (or I want to set one up) with one SSD as system disk and two HDD's for the data. Now the HDD's are new so they don't have any partition. What would be the best way to partiton it ...
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148 views

Add new partition under raid-1 array

I have small /tmp partition, and I want to create new partition with size 10 GB than current one, I have two hard disk on raid-1 array # mdadm --query --detail /dev/md0 /dev/md0: Version : 0....
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Software RAID 1 resync's on SATA cable switch?

I made a mistake when I opened up my desktop removed a 2 disk RAID 1 and reconnected them, but with the SATA cables switched, such that sda became sdb and viceversa. On boot, the RAID array started ...
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How to create a Software RAID1 in Windows 7 Home Premium? [duplicate]

Possible Duplicate: Which software raid modes does each version of Windows 7 support? Using the built in DISKPART program, or Disk Management, or anything else native to Windows 7, is there a ...
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Hard drive raid compadibility

Given that I have a RAID 1 array of two 2TB hard disks 3Gb/s @ 5400rpm could one of the drives be switched out for a 2TB 6Gb/s @ 7200 rpm? How do you know if two drives will be compatible in a RAID ...
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Firmware vs OS RAID (aka Windows 8 Disk Mirroring vs Intel Onboard)

So Windows 8 is out and I have a new motherboard. I wish to create a RAID 1 coupling between two HDDs -- for storage purposes only (my OS is on an SSD) -- but I don't know which is the best route to ...
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771 views

Data recovery from a single RAID1 disk

I extracted the disk from a Mybook World 2 (White Led). The device has only this 1TB SATA disk, and it is using RAID1. Yes, it is bizzarre, but WD enabled RAID even for a 1-disk configurations. This ...
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321 views

Data recovery from a RAID1 disk

I extracted the disk from a Mybook World 2 (White Led). The device has only this 1TB SATA disk, and it seems it is using RAID1 This is a report from disktype: francesco@blackhole:~$ sudo disktype /...
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Does Firmware RAID negatively affect non-RAID devices?

I am running Windows 8 on a Z77 Chipset mobo, and it's all running swimmingly, but I want to put my documents/music/etc. on two HHDs running under RAID 1. On my motherboard I have four SATA 3GB/s ...
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873 views

SSD lifetime in software RAID 1 [closed]

We're looking at use two SSD in a software RAID 1 raid on CentOS. We have tested performances and it is the same as a SSD alone. But we fear that because of mdadm, lifetime of the SSD will shorten. ...
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Software RAID 1 broken, how do I fix this?

I'm running CentOS 6 x86_64. There is a software RAID 1 being used on the two internal 80GB drives. I got the following e-mail sent to me: A DegradedArray event had been detected on md device /dev/...
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How to move a software RAID 1 to a new pair of larger drives?

I'm running CentOS 6 on a server that has two 80 GB internal drives, in a software RAID 1. I want to replace this two internal drives with 750 GB internal drives I have available. How do I do this ...