RAID 1 is the official name for mirrored disks or volumes

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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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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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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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37 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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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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67 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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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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28 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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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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19 views

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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57 views

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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33 views

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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125 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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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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416 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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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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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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23 views

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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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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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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331 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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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 ...
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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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63 views

Software RAID 1 in centos 7

I created software raid 1 using Two 1 TB hard disk in centos 7 using standard partition. I did this for fault tolerance feature in RAID 1 But, here when 1 hard disk failed the server goes into ...
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59 views

Doing RAID 1 on Mac OS X

After doing some research about RAID options and benefits I'm thinking (or shall I say - curious) of doing RAID on my two SSDs. In Disk Utility it allows me to do "Mirrored RAID set" (RAID 1?), ...
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230 views

How to convert a software RAID 1 partition to non-RAID partition?

RAID is not a backup, they say, but only now I can see that what I really need is an (external) backup. So, I would like to convert a (software) RAID-1 partition to a non-RAID partition (ext4) in my ...
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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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126 views

Ubuntu - OK to raid0 and raid1 on same two drives?

I'm building a household Ubuntu 14.04 server and just installed two 3TB drives for the files and media. The box (HP DC7900 SFF) uses Intel Matrix RAID which, according to wikipedia is neither hardware ...
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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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Unable to access newly created software RAID array in Ubuntu Desktop

please assist me with the following problem. I already have an Ubuntu Desktop 12.04 box into which I have added 2 500GB drives in the hopes of wring them up in a RAID-1 configuration for simple ...
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Windows Software RAID 1 - How can I “Offline” both disks at the same time?

I want to disable both drives in my Mirrored Volume setup so that I can mount them in a virtual machine (for testing, no important data is on the drives right now). Offlining them individually breaks ...
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No extents were found for the plex, when setting up Soft RAID 1 with RAID 5 on Windows Server 2012

I did find a similar question on this, but it did not really answer my question or fix the problem, so i'm starting up a new questions on it. This is my setup now: You can see if i have RAID 5 ...
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Ubuntu RAID1 with HP server

I have a server HP ProLiant ML310e Gen8V2 with 2 disks, and I want to install ubuntu 12.04 with RAID1. However, I have read some posts that say "This model of HP didn't support RAID1 with Ubuntu or ...
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326 views

chunk, ext4 stride and strip-width size for RAID level 1?

the man page for mdadm says: "[chunk] is only meaningful for RAID0, RAID4, RAID5, RAID6, and RAID10." i.e. it does not apply for raid1. even if you pass the value, it will say "ignoring chunk size" ...
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Create Degraded RAID 1 in Windows 7

Question is simple. Can one create a degraded RAID 1 in Windows 7? In other words specific to a hypothetical situation, can I have a backup drive with backup data on it, then buy a second backup ...
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Keep linux software RAID 1 after OS change

Currently I've configured software RAID 1 on ubuntu machine. However I am planning to add SSD drive just for the OS and keep my main 2 HDD for the storage with RAID. The question is, can I put now ...
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RAID 1 using three drives

Before you go say that RAID 1 mirrors one drive and cannot mirror twice, that's not what I mean. I have a WD Black 2 TB HDD and 2 WD Blue 1 TB HDD. The WD Black is to be the main drive, and ...
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Is a btrfs RAID1 mountable if the added device isn't available/offline/failed/degraded?

Assume I created a RAID1 with btrfs's functions (btrfs device and btrfs balance subcommands instead of mdadm) like so: btrfs device add /dev/sdxZ /dev/sdxY btrfs balance start -dconvert=raid1 ...
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Error RAID1 but can't seem to find where the error is?

I'm having trouble figuring out where the problem is. I'm seeing my two drives... I removed a failed drive and installed an empty one. Thought I added it to the raid and it said it was rebuilding. ...
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248 views

How can I create a software RAID mirror of the system drive after installing Windows 8.1 Pro 64-bit?

I have a brand new system with UEFI Install of Win 8.1 Pro 64 Bit. The OS is installed on a 1TB WD Drive I also have a second 1TB WD drive that is empty alongside it. They both are GPT. I'm having ...
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What will happen if I reconnect 2 halves of two-way RAID mirror after using them independently?

Suppose I have a storage space with two-way mirror based on 2 physical USB drives a and b. Then I disconnect b and connect it to another computer. Then I use—write some data—to both degraded storage ...
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166 views

Replacing a RAID1 disk with a different model

When I replace a disk in a 2-disk RAID1 array, how do I know if a proposed replacement disk is actually suitable? Just to make the question more concrete, the disk to be replaced is a 1TB Seagate ...