RAID 1 is the official name for mirrored disks or volumes

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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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136 views

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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213 views

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 ...
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470 views

Can I mix a 15K drive with a SSD drive in a hardware RAID1?

I've got a hardware RAID1 of two Hitachi 15K drives here, forming the array with an Adaptec controller. Let's assume one disk dies and I'd like adopt SSDs. I would then replace the dead drive with a ...
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How does one enable --write-mostly with Linux RAID?

Unfortunately the mdadm and mdadm.conf man pages are not quite up to par. I would like to enable the --write-mostly flag for my RAID, but neither the man pages nor the internet will tell me how. I am ...
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How do I mount a software RAID1 (mirror) created by windows in Linux using mdadm?

I'm switching my Windows server to Ubuntu and am trying to get my software RAID1 (mirror) that I created in Windows to show up in Ubuntu. I have read that this is possible here using mdadm, but I'm ...
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RAID1 External HD not working - shows up in Disk Utility but not usable. - MAC OSX 10.6.8 - What do I do?

I bought a dual bay enclosure from NewEgg I'm guessing 2 years ago to set up a RAID1. It's now a discontinued model but it is from Sans Digital. I put two Western Digital 1tb drives in it. It's been ...
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Install Linux mint with Raid

My MB supports fake raid (Intel DH67CL motherboard). But I was using the system in 'software raid' as I could not correctly set up fake raid in Debian. Now, I decide to use Linux Mint 12. During the ...
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How do I create a complete disk mirror in Windows Server 2008?

I'm trying to mirror a full Disk in Windows Server 2008, however I don't see any options to mirror a full Disk, only Volumes. Both disks are the same brand, size and are configured as Dynamic Disks, ...
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572 views

Windows will not load - Conflict between Windows repair and Raid 1 array/driver?

I have a friend whose computer hangs when it tries to load Windows XP. It has worked fine until a couple weeks ago. *Dell Dimension (don't have model number right now) *Pentium 4 *1 GB RAM *2 ...
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748 views

CentOS - mdadm raid1 drive won't mount to default location

I'm running CentOS 5.5, the system, boot, swap, etc. is all on /dev/sda and I have two identical single-partition drives /dev/sdb1 /dev/sdc1 that are configured in RAID1 (using mdadm). It was working ...
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How to remove swap partitions from RAID 1 Array on Ubuntu?

Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
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Seagate Barracuda Green & Intel RST RAID 1 - slow drive wake up / clicking

I've got an interesting problem that I can't quite figure out. I'm using dual Seagate Barracuda Green 2TB drives ( ...
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256 views

Windows 7 Mirroring Drive Failure

I had a few questions when a drive fails that is setup with software RAID 1 in Windows 7, e.g. Dynamic disk mirroring: Will it still boot using the good drive (assuming boot drive is RAID 1), or ...
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SSD in RAID 1 Questions

I want use SSD drives in RAID 1 setup. Although performance is important, reliability comes first, so I'm going with Intel drives (either the 320 or 510 series). This will be installed in a Dell ...
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I'm trying to mirror drives of the same model, but one appears to be slightly larger

I'm trying to mirror a drive using Disk Management in Windows Home Server 2011. The target drive (Disk 1) is the exact same model as the source drive (Disk 0), but the target drive appears to be 1MB ...
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How can I find out if my software RAID 1 is working?

I am running a software RAID 1 in Windows 7 Ultimate x64. Are there any tools in Windows 7 that can monitor or detect whether my RAID 1 is working properly?
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Will Thermaltake Muse R-Duo Raid reset lose data?

I have a Thermaltake Muse R-Duo Raid chassis with two drives installed and DIP switches set to Raid-1. However, only the left lights are lighting up and I have data on the drive. I'm guessing it is ...
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173 views

Linux + convert RAID0 to RAID1 on Blade Server HS21

I have HS21 blade server My blade server configured as RAID0 – one disk ( disk with red-hat Linux OS ) My target is to configure the blade server to RAID1 – mirror with 2 disks ( I need to add second ...
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602 views

Recover data from NTFS disk after RAID1 mirror operation

I have two identical disks attached to my Asus P5Q Motherboard which are not operating in RAID1 mode. Disk1 (640 GB, almost full) is/was 2 partitions (system, data - both NTFS) and disk2 (640 GB, 80 ...
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Create partitions for new install of Windows 7?

Does it really make sense anymore to create partitions? I'm installing Windows 7 x64 and would like to have the simplicity of 1 large partition. If it matters, the main hard drive is 2x120GB SSD ...
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Windows cannot boot after configuring sata to RAID mode

I have recently set up a new PC System, and still have issues configuring the harddisc raid. Here is the detailed description of my problem: The relevant components are an ASUS P8Z68-V PRO, Sockel ...
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RAID 0 + 1 with 3HDD 2x1TB + 1x2TB

Is it possible to make RAID 0 + 1 with 3 Hard Drives I have currently setup raid 0 with 2x~1TB HDD (1.8TB approx) Now i got 2TB HDD (1.9TB approx) which i want to be as a mirror drive. Is is ...
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Malfunctioning TS-239 Pro II+, how do I recover my data?

I'm in a real bind here. About a week ago I bought a QNAP TS-239 Pro II+ and transferred all my important data across to it. It's a 2 TB RAID 1 array, because I really don't want to lose this stuff. ...
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Using Intel Rapid Storage Technology RAID-1 in “on request” update mode is a viable backup solution?

I have 2 Seagate Barracuda Green 2TB HDD in RAID 1 using Intel Rapid Storage Technology. I use them as a storage volume, that is not accessed very frequently, and most importantly, that is not written ...
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741 views

dmraid -r" just returns No RAID disks

I have installed centOS 5 on our HP Proliant ML110 GH6 server and configured the Smart Array through BIOS Now, i would like to set up an e-mail notification with the RAID status (especially if it's ...
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How can I mount a single RAID 1 disk/partition as ext3?

I need to copy data from a single HD, which used to be part of a Linux RAID 1. I've googled around, but can't find any clue how to mount partitions from this single HD. Background: The HD comes from ...
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744 views

RAID with pen-drives, it is possible?

Can Windows 7 manage 2 or more pen-drives (or external disk drives) to implement a RAID-1 to backup the content of them? I have a pen-drive and an external hard disk, both with really relevant and ...
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combining SSD and hard disk in software RAID1?

Does it make sense to build a Linux software RAID-1 (mirroring) using an SSD and a normal hard disk? I want to combine the advantages of SSD (fast transfer rates, fast access times) with the ...
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How can I move RAID 1 hard drives from one enclosure to another or retrieve the data another way?

I have a Fantom G-Force Mega Disk MDN 1000 dual drive hard drive enclosure with two 500 MB hard drives setup in RAID 1 mirroring mode. Unfortunately, the enclosure/controller has failed, for the ...
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mdadm raid-1 after restarting usb devices not accessible anymore

Is my mdadm software raid in danger of data loss??? My both two new built raid-1 on external usb disks behave strangely. Both were fine and rebuilt and cat /proc/mdstat showed Every 10,0s: cat ...
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407 views

Raid 1 Disk Syncing

When attempting to test that my RAID-1 configuration was working, I am thinking that I may have made a mistake that could cause future corruption of data because I booted from a single HDD when the ...
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1answer
288 views

Linux software RAID 1 without metadata on the drives (still mountable without the raid setup)

I know I can simply create a degraded raid array and copy the data to the other drive like this: mdadm --create /dev/md0 --level=1 --raid-devices=2 missing /dev/sdb1 But I want the specific disk to ...
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I am researching a raid-1 setup with 3 drives where one is cycled off to an off site location

To be more specific: What procedure, or what kind of hardware would you need to set up a Raid 1 with 3 drives, where one of them is cycled out to an off site location. So set up in something like ...
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How to move an existing Windows 7 setup to a RAID-1 array?

Currently I have a the following setup: Drive A/B: Identical hard drive's Drive C: 2TB external drive with plenty of space currently. Hardware RAID controller Currently I have Drive A which is my ...
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Raid recovery in gigabyte GA-8I945 Pro

This was a working machine until a few days ago. And now it won't boot into the OS, during startup if makes clicking sounds (I think from one of the drives). Installed OS: Windows 2003 Web edition ...
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Can the drives in a RAID 1 array be rotated?

As a follow-up to my question Disaster recovery backup of files/photos for personal use, it sounds like for personal disaster-safe backup, multiple rotated hard drives is the way to go. One of the ...
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Add a small RAID card? Will it help overall stability and performance of my nine hard drives?

Will I get any extra genuine added performance and RAID stability if I insert a basic RAID card into a PCI-E x1 slot? I am considering the Adaptec 1220SA - 2 port SATA, PCI-express (1x), RAID 0/1. ...
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What advantages and disadvantages have Hybrid SSD/HDD RAIDs

I just read about Hybrid RAID arrays consisting of SSDs and common HDDs which are supported by Adaptec's RAID controllers. Does such a RAID configuration provide real advantage? Isn't write ...
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763 views

How to resize an encrypted LVM in RAID 1 in Linux?

I am running 3 partitions in RAID 1. Partition : Mountpoint : Filesystem : Encrypted : LVM ------------------------------------------------------ 1 : /boot : ext2 : No : No ...
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Unable to access intel fake RAID 1 array in Fedora 14 after reboot

First I am relatively new to linux (but not to *nix). I have 4 disks assembled in the following intel ahci bios fake raid arrays: 2x320GB RAID1 - used for operating systems md126 2x1TB RAID1 - used ...