RAID 1 is the official name for mirrored disks or volumes

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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 ...
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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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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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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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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 ...
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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 ...
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How to add new partition to RAID-1 array on Redhat FC10?

I have a RH FC10 system with RAID 1 partitions, here is mdadm.conf: # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md1 level=raid1 num-devices=2 metadata=0.90 ...
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Can RAID 1 have more than two drives?

Recently I had a discussion with a teacher of mine. He was claiming that you could set up RAID 1 with five drives and that the data would be mirrored over all of these drives. I told him a RAID 1 ...
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Is TRIM disabled even with Windows Soft RAID 1 (Windows Dynamic Disks)

I am looking to build a Windows 2008 Server and wanted to use a RAID SSD array, either via SATAIII or PCIe. Everything I've seen that RAID does not allow TRIM commands to be passed to the SSD, ...
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Is it okay to mix HDD models of the same size and manufacturer in a home server RAID 1 array?

I've got a WD Caviar Green drive I'd like to put in a hardware RAID 1 array for a home server (for storing music, photos, etc). Problem is, the specific model I have isn't shipping any more. Will I be ...
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Upgrading disks in a RAID1 Synology 2-bay drive

I have a Synology 2-bay 211j NAS with 2x1TB HDD installed as single RAID 1 volume. I'm running out of space, so I'd like to upgrade my NAS with 2x3TB HDDs. Is there any easy way to copy all data from ...
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Ubuntu 12.04 boot degraded RAID

I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third ...
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224 views

Booting Ubuntu with a RAID-1 Boot Failure

I'm planning on picking up 2 SSD cards for my file server and installing Ubuntu on them using softRAID-1. I will not be keeping a hot spare, so I want to make sure that, if one drive fails, I can ...
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FakeRAID array is failing, why?

We have a Windows XP system with an AMD mainboard (GA-890GPA-UD3H) and we are using the onboard RAID capability. The system is configured in RAID 1 (using the tool AMD RAIDXpert). It consists of two ...
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Hardware RAID 1 With ERC/TLER/CCTL

I am aware of the problem when using standard consumer-grade drives with RAID levels 5 and 6; if a drive takes too long trying to read and/or repair a bad sector, it will be dropped by a hardware RAID ...
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My existing external RAID 1 will not show on my new motherboard

I had two identical (external) WD 1Tb HDD that I set up in RAID 1 NOT through BIOS. I forgot how I did it (just followed some instructions online how to do it through Disk Management). But the RAID ...
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Windows 7 : soft RAID1 and dynamic volumes reliability

My setup is quite classic nowadays : 1 SSD for system/apps and 2 HDDs for data setup in a fake RAID1 array. I also have a backup scheduled every week for the data drive in case it fails because I ...
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Recovering data from RAID1 drive

I have recently received one of the two 1TB drives I had on a dedicated server. The drives were mirrored and the server was running CentOS 5.6. I've installed it in an USB enclosure and tried ...
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How to check consistency of an external RAID1 array in Windows?

I have a Western Digital MyBook Studio II configured into RAID1 (2×1TB) and connected to a Windows 7 machine via USB 2.0. RAID is done through a controller in the enclosure - I've never seen each of ...
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Is Intel Rapid Storage Necessary for a RAID 0 on a P6T-SE?

My question is indeed quite simple but I didn't find a clear definite answer by the usual method (aka Google), so I turn to this great community I have an asus P6T-SE motherboard which includes an ...
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RAID 1 Mirror Error with Two Western Digital 500GB Drives

I have Windows 7 Ultimate 64 bit installed on a Western Digital 500GB drive (WD5000BEVT-22ZAT0) that was partitioned automatically by Windows as 100MB System Reserved and 465.66GB drive C. There is ...
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How to fix missing RAID1 drive

I had to do some fiddling about with my cables inside thebox and now I am getting a "Critical Error" about the RAID disks during startup. I have a gigabyte GA-MA770T-UD3 motherboard. Aparently the ...
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Is it possible to use software raid in Windows 7 on the boot partition?

I want to use RAID 1 on my workstation configuration at work, and I've been looking at using the build in mirror functionality in Windows 7. When you click on the add mirror option it presents you ...
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Raid-0 (2xSSD) + Raid-1 (1xHDD) possible?

Is it possible to have the following setup? 2 x SSD (2x128gb) in RAID-0 (for performance) + 1 x HDD (1x500gb but using 128gb) in RAID-1 (for redudancy) If so, does the HDD mirror give a decrease ...
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448 views

How to convert existing disk to raid1 in debian

I have 1Tb drive with LVM on it. Now I've installed another 1Tb hard drive. And I want to make RAID1 without losing data on the first disk. Is there any way to do that without backing up data and then ...
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Simple mdadm RAID 1 not activating spare

I had created two 2TB HDD partitions (/dev/sdb1 and /dev/sdc1) in a RAID 1 array called /dev/md0 using mdadm on Ubuntu 12.04 LTS Precise Pangolin. The command sudo mdadm --detail /dev/md0 used to ...
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What triggers a RAID 1 mirror rebuild on a Lacie 2 Big USB3?

I have a RAID 1 mirror on a Lacie 2 Big USB3. When I break the mirror by pulling out one drive, keep making changes on the remaining drive and finally put the first one back in, the drives stay ...
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RAID1 Setup - Are Empty/Blank/New hard drives a requirement

I need to setup RAID1 (software/hardware). I have a 1TB (no space left), can I buy a new 1TB and setup RAID1 successfully without a remote chance of loosing anything on the existing 1TB, as I got it ...
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How to set up software RAID 1 on Ubuntu 12.04?

My primary partition is sdb. I add new disk (sda) and formatted it as shown below: fdisk -l Disk /dev/sdb: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 ...
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Ubuntu 12.04 - Add RAID 1 Array on existing device?

I read How can I add a RAID 1 array in Ubuntu 10.04 and Installing Raid 1 on Existing Ubuntu Server. However, I only have the following 2 hard drives: dev/sdb1 where Ubuntu 12.04 is currently ...
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Ubuntu - inconsistent performance with software raid-1

I'm installing a new system using soft-raid 1 with two physical disks. While running a few tests (after waiting for the initial sync to complete) I found the harddrive speed was highly inconsistent. ...
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How do I break a failed software RAID1(mirror) in Windows 7 without wiping data on the mirror HDD?

In Windows 7 I have created a software RAID1 array that has failed(failed redundancy) due to some weak sectors on one of the HDDs. I want to be able to reactivate the mirror HDD as a separate ...
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“error: no such device” at boot in Ubuntu Server 11.10 with Raid1

I have a configuration of 4 HDD's as RAID1 2 pairs of 2 HDD's. The first RAID1 pair is for the system, so I just made an 40GB space for swap, and the rest of it for the root. The second pair of ...
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Windows 7 won't boot from raid-1 disks until secondary non-bootable disks are removed

I have an ASUS X58 motherboard with a Intel ICH10R southbridge raid controller. Bootable raid-1 SATA disks are on channels 4, 5. Secondary raid-1 SATA disks are on channels 0,1. Everything was ...
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RAID 1 - What happens if I disconnect both disks?

I'm trying to install windows on a new SSD, and I'm having problems getting it to work correctly. I've read that it's good to disconnect all other drives and do a format and clean install. Only ...
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How to move a windows machine properly from RAID 1 to raid 10?

Goal I would like to add two more hard drives to my current RAID 1 setup and create a RAID 0 setup on top of the two RAID 1 setups (which I believe is referred to as "RAID 10"). Components Involved ...
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Restore data from a single RAID1 disk

I have one half of a RAID 1 array (from a LaCie 2big Network NAS), from which I'm trying to recover the data. I've connected the disk to my desktop PC (Ubuntu 11.04) using a Sitecom SATA/USB adapter, ...
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Can I pull one HDD from RAID1 and still use 2-bay QNAP NAS?

I have a QNAP TS-239 Pro II+ with 2 x 2 TB HDDs in RAID1. I'm running 3.6.0 Build0210 firmware. I access the NAS from my iMac (OS X 10.7.x). The NAS HDDs are formatted as ext4. I'm sitting at about ...
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Windows 7 mirrored volume fails during testing of fail-over mode

I have two hard-drives mirrored (i.e. RAID-1)to be my D: volume (non-boot drive) in Windows 7. Click to enlarge. This is the first time I have tried mirroring in Windows 7, but I've had (sometimes ...
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mdadm: hot remove failed

My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /): ...
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How does RAID 1 determine whether a disk is corrupted?

I've built a RAID 1 array of 2 disks, A and B. That means that every bit on A is equal to a bit on B. If one disk fails, I can safely retrieve my data from the other disk. But then I started ...
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A ZFS or LVM or MD redundant heterogeneous storage proposal

I have the same problem most people have: how to create a reliable personal storage solution with the fact that: Hard drives fail with alarming regularity. Losing files is unacceptable. I will buy ...
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How to identify raid1 disks

I would like to know how mdadm identifies physical disks of raid1 . I think it is managed by uuids not device file like /dev/sdc2 /dev/sdd2. But I can`t confirm such information of raid1.
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Does RAID1 increase performance with Linux mdadm?

I have a cheap 2-bay NAS with a 2TB HDD. To be robust against disk failure, I'm thinking of buying a second 2TB HDD and putting it in RAID1 with Linux mdadm. The file system is ext4. Will this ...
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What is the impact of using a Desktop edition disk in a RAID 1 setup?

I am setting up an onsite backup server in RAID 1 (soft) with low usage. I prefer quietness and reliability over performance: so I selected one of these "green" disk. Some NAS brand recommand these ...
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What are the theoretical performance differences between a single disk and a RAID-10 array?

Not taking hardware RAID cards into account, what kind of theoretical performance improvements should I see when using 4 disks in a RAID-10 array vs 1 disk by itself? For example, on RAID-0, I would ...
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Juggling HDDs and SSDs between home server and laptop

I just built a home server a few months ago with four 2tb drives for storage of media. It was booting from a 120gb Vertex3 SSD. That drive failed, now I'm realizing I don't need a SSD for the boot ...