RAID 1 is the official name for mirrored disks or volumes

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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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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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26 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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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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152 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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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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23 views

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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98 views

Does Btrfs prone to RAID write hole effect?

Does Btrfs prone 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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LVM RAID 1 for root

I have LVM RAID 1 (not mdadm RAID 1, but exactly LVM2 RAID 1) for my root partition. I would like to make my system boot without either of the HDDs where the underlying PVs of the root LVM partition ...
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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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65 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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139 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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40 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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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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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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74 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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129 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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282 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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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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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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201 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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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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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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506 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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64 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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mdadm RAID1 on OS drive by cloning, then changing the UUID on 2nd disk?

Ok, I've been doing some research into installing ubuntu server onto an mdadm raid1 setup and ive come across a couple ways: 1) install it onto two drives by using the "manual" method on the cd ...
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287 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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199 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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479 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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271 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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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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153 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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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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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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is it possible to mount only one device from software raid 1?

Is it possible to mount only one device from raid without mdadm? Eg: I have /dev/md0 raid 1 consisting of /dev/sda1 /dev/sdb1. I thought that /dev/sda1 contains filesystem with data (same as /dev/md0) ...
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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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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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RAID 1 on 3TB GPT Hard drive and z77 board - fails to boot in RAID mode but works under ACHI

I have a Gigabyte Z77X-D3H board. when I install windows 7 or 8 on to the GPT drive (3TB) as RAID 1 it will install but not boot. If I switch the SATA controller to ACHI on the intel controller it ...
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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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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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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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215 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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418 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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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 ...