RAID 1 is the official name for mirrored disks or volumes

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managing zfs + mirroring

I've noticed that guides on zfs+redundancy+performance tend to emphasise mirroring as a good option, but zfs administration information tends to provide relatively little information on managing a ...
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Linux mdadm does not assemble array, but recreation of array does it

Maybe i'm not very clear in the title. When i'm trying to assemble my raid1 array with mdadm: sudo mdadm --assemble /dev/md0 /dev/sdc /dev/sdd It tells me that mdadm: Cannot assemble mbr metadata ...
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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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Does software RAID 1 in Windows 7 improve read speeds?

Does software RAID 1 (mirroring) in Windows 7 improve read speeds? I'd like to set up RAID 1 to help protect my important documents (yes, yes, I know it's not a backup), but performance is also ...
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3k views

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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25 views

SED shadow master boot record and linux md raid 1

I'm contemplating this setup: Two SSDs with SED (self encrypting drive), in a software raid mirror, linux (or grub?) to unlock the two disks with one pwd from the Shadow Master Boot Record I ...
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2k views

Use software RAID 1 drive as main disk and boot drive in windows 7?

Can I boot from a software RAID 1 (mirroring) drive in windows 7? Windows 7 would not let me install to a software RAID volume so I installed to the first disk and then added the second disk ...
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Directory based virtual RAID1

The problem: I have video files for a project that require editing. Those files are larger than usual, therefore disk speed became an important obstacle during my work. The Idea: I know I could ...
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Intel Raid1 \ “Fakeraid” Shows up as 2 Logical Drives in Windows server 2008 r2

As the title says. I have successfully raided 2x <250 gb drives in Bios as C:\ without any problem. However when i try to Raid the two WD RED 3TB they "show up correctly" in my bios and inside ...
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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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1answer
10 views

Does rsyncing a Linux boot disk require any caveats to run off the copy?

The new server to run CentOS7 is on order. It will have a 60 GB SSD for CentOS 7 and four internal hard drives. The internal hard drives will run in a software RAID1 for three disk mirroring plus the ...
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49 views

Two systems freezing up: probably a RAID/MB sata controller failure?

I have two systems with approximately the same age with similar trouble: First system: ASUS P8h67-m-le mother r3 version i7 2600 (3,4ghz) 8gb ram ddr 3 (2x4gb dual channel) RAID 1 via ...
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19 views

Does NASware 3.0 benefit a software RAID1 running Linux?

WD Red drives comes with NASware 3.0 (or older ones NASware 2.0). In running a CentOS Linux server in RAID1, does NASware offer any benefit? Or is NASware a Microsoft server thing?
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55 views

Migrate from Windows 7 single HDD system to new system with RAID 1

I have a Windows 7 system with a single drive. It is regularly backed up to a system image on a USB drive. I'm building a new system with two drives that are bigger than the old system's drive. I ...
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2k views

Resize a RAID 1 volume on OS X Snow Leopard - how? (Note: software raid)

I've scoured the Internet in search of an answer to this question, and as usual with OSX-related topics, I often don't find any deep-dive technical explanations sufficient enough to feel confident ...
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1answer
809 views

Large File Copy Freeze, Hardware Setup

My computer is home built with the following components: BIOSTAR A780G M2+ SE AM2+/AM2 AMD 780G Micro ATX AMD Motherboard AMD 64 X2 6000 Kingston HyperX 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 ...
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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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73 views

RAMDisk + SSD = Raid 1? Boot OSX

Is it possible to create RAID 1 with RAMDisk and SSD in OSX? Something like: Boot Mac, OSX-Partition will be loaded from SSD in RAMDisk. Boot to RAMDisk and use it like any other system-drive. ...
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21 views

Multiple HDDs hanging constantly

I have an AMD Windows 7 system which has its OS on an SSD, and until previously had a single 4TB HDD as a data drive. I never had an issue with that drive until I installed a second 4TB drive and put ...
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10 views

How to replace drive in RAID1 with SAS 6 Util without losing existing data?

The machine in question is an older Dell Precision T7400 which had 2 1TB drives configured as RAID1. When a problem was suspected with a drive, I entered the BIOS-level config utility (v6.14.10.10) ...
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Is a RAID1 (mirror) with 2 x 4TB drives and ZFS (through freenas) okay?

I'm looking to create a freenas RAID1 using two 4TB drives. It's going to be my primary location for a generic backup location (use rsnapshot for local files and keeping computer dd'd images) and ...
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29 views

Raid 0 with mixed drives

I have following 7 physical drives When trying to create RAID0 It shows the total capacity as 237.2 instead of 365.2 So is there any RAID configuration where I can have a single volume spanning ...
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1answer
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MDADM two disks of different ages from same array

I have an mdadm mirror. One of the drives was failing, and through not concentrating, the a new drive was mirrored against the failing drive, which had been out of the array for a while, so is a ...
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747 views

Raid recovery in gigabyte GA-8I945 Pro

This was a working machine until a few days ago. Now it won't boot into the OS, during startup it makes clicking sounds (I think from one of the drives). Installed OS: Windows 2003 Web edition ...
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Raid-1 Western Digital Green AARS, cloning and WD Align Utility

My current setup runs on top of 2x Western Digital 2500KS drives on Raid-1, using the motherboard's 780G raid controller, on WinXP. Everything is fine, but the drives are a bit noisy. I am ...
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Rebuilding a raid 1+0 (10) system

We have a set of 8 disks that are raided together with RAID 10. Our software that rebuilds RAIDS do not allow a RAID 10 but does have a RAID 1 or a RAID 0. In theory, we wanted to drop the mirrored ...
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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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Trying to mount Western digital mybook duo raid 2 disks but fails

I connect both my linux system. I do a bash-4.2# mdadm --assemble --scan mdadm: /dev/md/MyBookLiveDuo:2 has been started with 2 drives. then i try mount /dev/ ash-4.2# mount /dev/md/MyBookLiveDuo:2 ...
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Which copy will be used when RAID1 loses a piece of data? [duplicate]

The case of complete drive failure is pretty clear for RAID1: the faulty drive simply does not work and data is being read from the good one. Now the other real situation: the drive works, but some ...
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btrfs RAID-1 size

I have a btrfs raid1 filesystem with a couple of disks 1TB 2TB 2TB 2TB 5TB which should result in a total of a 6TB RAID-1 array. The result of the http://carfax.org.uk/btrfs-usage/ Total space ...
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Win 7 won't recognize 850 Evo single disk with HDDs in RAID1

This has managed to drive me nuts: I used to have 1 SATA HDD as a single drive for OS's and 2 SATA HDDs set-up as RAID1 using the onboard AMD controller for storage, everything was fine. I bought this ...
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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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Is it possible to create RAID1 and JBOD with 2 hard drives?

I have a 2-Bay Synology NAS enclosure and ideally I want to achieve the following setup, unfortunately the GUI doesn't allows me. So my question is Is it possible to create the following setup? And if ...
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1answer
167 views

How do you increase harddrive space on an Intel hardware RAID 1 with larger disks?

I have an old RAID 1 volume from about 7 years ago. A while ago I replaced one out of two drives with a drive with 4x the size and then recently I replaced the second two out of two disks. Both of the ...
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10 views

Unable to tell if RAID 1 (or any RAID) is active

I recently installed Windows 10 on a new computer build, but wanted to install it with RAID. I haven't done RAID before, but I set it up in my BIOS. But once I do this, now it says that both drives ...
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465 views

SSD TRIM support on RAID-1 array through Intel RST

I'm making the jump from HDDs to SSDs on my home desktop, and I'd like to retain a basic level of redundancy (RAID-1) like what I have with my HDDs. Right now, I'm using Intel's RAID controller on my ...
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91 views

Replacement drive for Lacie Network Space Max Raid 1

I have a faulty drive in my Lacie Network Space Max (Samsung HD103SI 1TB) I have to install a replacement, but the original drive type seems to be out of production. Can i replace it with this one? ...
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To know hard disk failing in RAID 1

I have set up RAID 1 in windows 7 using disk management console. But I don't know if one hard disk is failed. I would like to get alert or message when one hard disk is failed in RAID 1. How can I do ...
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1answer
264 views

Firmware RAID drive assignment suddenly missing - How to add it back?

I have an ASUS Sabretooth 990fx R2.0 motherboard, and I have three HDD's in total. 2 x 250GB Samsung EVO SSD drives and a single WD 1TB HDD. I had set up my 2 SSD drives in RAID-1 configuration ...
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19 views

changing RAID hard disks

There are four hard disks in my machine. I installed window 7 in disk 1. I set up RAID 1 in disk 2 and 3 in disk management console. It is working well. But I would like to change RAID hard disk. I ...
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3 mirrored volumne in window 7

Can I make 3 mirrored Hard disk in window 7? I would like to use backup system(mirrored volume) with RAID 1 in window7. But the problem is that I can make two volume mirrored. Is that possible?
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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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2answers
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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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more than 3 hard disk in RAID 1 setting up

I would like to add 3 mirror Hard disk(RAID 1) by using software base RAID 1. In window 7, I can add only two mirror Hard disk. I would like to be that one data disk and two back up disk. How can I ...
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388 views

WD EX4100 RAID Adding Drives (4TB Red)

I have an WD EX4100 with two bays open; set to raid1 4x2 x raid1=4tb I want to add 2 more 4tb drives will raid rebuild or do I have to start over?
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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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Raid 1 upgrade path?

I have a 3ware 7950-4i RAID controller configured as the boot drive for a Linux server running several virtual machines. It is populated with three 1 GB drives. u0 consists of p0 and p1 configured as ...
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1answer
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Why is my RAID-1 disk inactive?

The state of my RAID-1 disk (created with two SATA Disk Drives) is "inactive" and I don't know why. It should be active under normal circumstances. I just want to know in which case would a RAID-1 ...
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41 views

recover data from single RAID 1 disk

I have a Lacie 2 Big NAS drive containing 2x1TB disks in RAID 1 mode. Since one of the disks was being reported to fail, I tried to backup the contents of the NAS to another external HDD. ...
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Raid 1 with two hard drives, which hard drive will overwrite the other?

I have two hard drives in a raid-1 volume that Windows 7 boots from (let's call them harddrive-a and harddrive-b). I got a third harddrive-c so that I could install Linux. To protect my Windows ...