RAID stands for Redundant Array of Independent Disks, and is a technology which can provide increased reliability, performance, and/or redundancy by utilizing multiple hard drives simultaneously. RAID can be implemented in a computer via either a hardware or software controller.

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RAID 0: how identical do the drives have to be?

I have a spare 1Tb. Seagate Barracuda HD, and I was planning on buying another one and creating a RAID 0 array using my motherboard's SATA controller... but I have a doubt: how "identical" do the two ...
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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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Need to find which drives are mirrored within RAID-10 array

I have a home media server running on openSUSE 12.2. I'm using eight 2TB drives in a RAID-10 configuration. I deliberately bought two different types of drives: four Seagate Barracuda Green and four ...
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Ubuntu Server 12.04. Software RAID1 state degraded with a spare drive

After a disk failure, this is the output of mdadm --detail /dev/md2 in my Ubuntu Server 12.04: /dev/md2: Version : 1.2 Creation Time : Thu Dec 27 10:51:42 2012 Raid Level : raid1 Array Size : ...
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Shrink RAID by removing a disk?

I have a Synology NAS with 12 bays. Initially, we decided to allocate all 12 disks for a single RAID-6 volume, but now we would like to shrink the volume to use only 10 disks and assign two HDDs as ...
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Using smartmontools to check on Intel RAID arrays

I have a Windows 7 box with a two-drive RAID 0 array created using the motherboard's SATA controller (Intel ICH8/9). Since I can't access the SMART status of the drives in it (because they are ...
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18 views

How to force System Reserved to be created on the boot disk drive

I have machine with three disk drives - Disk 0 500 GB SSD - Disk 1 4TB Mechancial Drive - Disk 2 4TB Mechanical Driver I am installing windows 8.1 on this machine with SSD being the c:\ ...
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Windows software RAID: dynamic disks or storage spaces? [on hold]

I have a couple of big SATA-3 disks (4 TB) which I use on my home computer for storing data, and I want to set them up in a RAID-1 configuration for redundancy; I don't trust my motherboard's ...
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27 views

4T RAID 0 Partitioning issue

I am building a new workstation 1.2T 10K SAS X 4 for Win 7 Pro SP1 x64 I must use RAID 0 for this workstation. What I would like to have is C = 500G D = rest of spaces So BOIS based system with ...
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Create a Spanned drive with 3 external hard drives

I'm trying to create a merged drives from 3 externals drives (2*3Tb + 1 * 2Tb) on Windows. I went to diskmgmt.msc and tried to create a spanned drive, but i keep getting the error "Operation not ...
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WIndows server 2012 will not allow mirroring drives/partitions

I have a dell c1100 server and it gave me a hard time installing windows server 2012. Now installed, I want to setup mirroring inside windows (raid 1 effectively). In disk management, I right click ...
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2x3tb vs 3x2tb RAID drives for home nas [closed]

2x3tb vs 3x2tb RAID drives for home nas What's more reliable if both of them cost the same money? 2x3tb in RAID 1 3x2tb in RAID 5 From my perspective removing one failed drive of 2tb is cheaper ...
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3k views

How do I set up a RAID 0 on windows 8?

I have a windows 8 machine with a 2T internal hard drive and 12G of ram. I have an external WD 3T that automatically backs up my entire I tunes Ibrary. I have added a second 2T internal drive and ...
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46 views

btrfs convert from raid1 to raid5

Is it possible to easily convert a btrfs raid1 to a raid5. I mean at the end of the day. Its really just two mirrored drives. So I would think this should be easy to do. I want to now have 3 3TB ...
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22 views

cloning drives to correct RAID 10 failure

I don't type questions like this very often, so I apologize if I could have made it clearer. I have 4 HDD slots in which I had a RAID 10 array setup. It is a motherboard software RAID so clonezilla ...
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33 views

SSD's or HDD's in a LANcache?

I am building a LANcache for a lanparty that I'm organizing. We have about 80 visitors (pretty small LAN), but our uplink is limited to 100mb/s due to reasons and it's constantly saturated with game ...
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19 views

Intel RAID not detected after rebuilding PC - recovery options?

I'm running a RAID0 array on a Windows 7 PC with an Intel ICH10R SATA chipset, consisting of 4 x 4TB drives (plus a separate drive for the OS). I re-built my PC after getting a new case, and cleared ...
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Is there any reason to replace a failing disk in a raid10 before it has completely died?

My home server has four 4TB disks configured as a RAID10. I've gotten a few messages recently suggesting that I'm about to lose one of my disks: $ WARNING: Your hard drive is failing Device: ...
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SSD cache, SRT, Raid 0 : speeding up my C drive

I have a Z97 rig and I'm interested in speeding up my disk drives. This is my current setup: 1) 240GB SSD for main disk 2) 500GB hard drive for User Files 3) 120GB for photo editing (I move files ...
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9 views

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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How Do I Properly Disable Intel SRT & Remove the SSD Cache Drive?

I bought a Dell XPS 8700 which comes with a 2TB HDD paired with a 32GB SSD cache drive using Intel's SRT technology. I'd like to install a new 512GB SSD for the OS and use the separate 2TB HDD as a ...
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21 views

Intel Software Raid: Downgrade from RAID10 to RAID 1

My configuration Windows 8.1 Asus Z87I Pro (Rev C2) 4x WD Red 3TB, set up as RAID10 in the Intel tool / EFI My target I want to remove 2 of the HDDs permanently from the RAID because I don't ...
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63 views

Low speed on an 850 Pro RAID-0 array

I recently bought two Samsung 850 Pro 256GB SSDs in order to replace an old SSD and build a RAID-0 array on my PC. So, the configuration of the PC is the following: CPU: Intel(R) Core(TM) i7 CPU X ...
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Should I replace HDD in raid array every N years even if disks aren't corrupt?

Typical scenario: I made a raid 1 array out of 2 disks, that contains data I wouldn't like to lose. I found that average life-time of HDD (rotating drive) is 3 - 5 years. Does it mean that if the ...
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Very slow volume expand on Synology ds2413+

I've posted this elsewhere on the internet aswell, and will obviously reply in both places if a proper solution is found. I am attempting to expand SHR volumne (2x4TB, 1x2TB) with additional 4TB ...
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Which software raid modes does each version of Windows 7 support?

Being familiar with the software raid modes and dynamic disks from the server versions, I was wondering if there is a document or even just common crowd knowledge that indicated what software raid ...
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RAID solutions for a home server instead of ZFS [closed]

I’m using Ubuntu Server with 4 2TB disks and I’ve been using ZFS for around 8 months on my HomeServer. But now I have reached the capacity of my pool, so I want to purchase a new drive and add it to ...
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20 views

suse linux installatation on HP Gen9 server

I am unable to install SUSE Enterprise Server 11.0 with sp3 on HP gen9 server. It's unable to recognize the storage. The raid controller is p440ar. It had tried installing with HP ProLiant Gen9 ...
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11 views

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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25 views

XFS filesystem spanning drives and allocation group alignment

I have a query regarding creating an XFS filesystem on what is commonly incorrectly called a JBOD volume, that is, linear RAID or Spanning raid. I have two hard drives (1.5T and 2T) that I want to ...
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161 views

Putting two physical hard drives in a single 2.5" bay?

My crazy brain came up with this ridiculous idea. "Why can't I have a single 2.5" drive device that actually contains two independent hard drives? I want RAID 1 data mirroring and the security of ...
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13 views

Removed drive from NAS not recognized when plugged in via USB

I'm having a problem accessing the data from a drive that was in my NAS but is now plugged in via a USB caddy. This drive was not in a RAID array as it was a volume with a single disk. Although it ...
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15 views

how can I reintegrate a lost and found pv into an LVM vg?

I recently lost a RAID that was a physical volume of one of my linux LVM volume groups. I ended up doing a vgreduce --removemissing and got on with the business of restoring the data. Well, today I ...
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How much slower is a RAID 1 hard drive compared to no RAID?

How much slower is RAID 1 than no RAID at all? I have heard that RAID 1 provides peace of mind (because of mirroring) but gives slower write (not read) performance.
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Linux soft RAID5 array with mismatched events won't assemble

The last three nights, one of my USB controllers has gone offline in the middle of the night, knocking 4 of my 8 disks offline. The first two times, I was able to get it working again with mdadm -A ...
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Does setting BIOS SATA RAID/AHCI mode to RAID will activate RAID operation upon new hard disk insertion?

Each BIOS 'SATA RAID/AHCI' mode comes with at least 3 different mode - Disable/IDE or RAID or AHCI. Does setting the 'SATA RAID/AHCI' mode to 'RAID' will cause the following: RAID 1 activated when ...
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Does switching SATA/AHCI mode in BIOS affect Windows OS and data in the hard disks

Suppose the following situation: Each desktop machine have 3 internal SATA hard disks of different sizes (500GB, 1TB and 2TB) The BIOS have 3 types of SATA/AHCI mode (Disabled/IDE, RAID and AHCI) ...
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AHCI and RAID for BIOS settings when using 2 or more SATA hard disk

My third-hand desktop machine have the following BIOS settings: At what scenario should I choose 'RAID' and what scenario should I choose 'AHCI' and what other scenario should I choose 'DISABLED'?
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Disconnect a RAID 1

I currently have a setup of a 2 disks in RAID 1. How-ever I'd like to disconnect the raid and only run off one disk. Is this possible? Or will I have to reinstall the system? The RAID is a soft-raid ...
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19 views

Drives not working after failed factory reset of NAS?

I got an old ReadyNas 1100 that had 4x500GB drives from start. One gave up so there were 3. I thought I should by some upgrade disks and went ahead and bought 2x2TB. Now begin the dream. I just ...
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AMD RAID Configuration SSD+HDD

Today, I bought a new components for my HTPC and as usual, I went with Gigabyte Motherboard. This time, I bought an AMD board: GA-F2A88XN-WIFI. Besides the board, I bought a Kingston Fury 120 GB SSD ...
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3k views

Can I setup two RAID arrays on a single intel z97 controller?

Let me preface this by saying that I have never setup a RAID array myself, other than by using software RAID 0 in Windows for a set of storage drives. I purchased a new ASUS Maximus VII Hero ...
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292 views

Btrfs: RAID 1 on 3+ devices

I currently have a Btrfs partition with four devices: three 3 TB drives and a 4 TB drive. Data and metadata are RAID 10, so I have 6 TB of usable space, which is almost full. I'd anticipated that RAID ...
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Recover data from non-RAID SCSI drives on Dell PowerEdge

I have two old Dell PowerEdge 1750 servers. Server A has failed physically, and I need to restore some data from it's hard drives using server B (I do not have any other hardware that can work with ...
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408 views

How to create a Mirrored Volume in Windows 8.1 - mirror option missing

I am trying to create a mirrored volume (RAID-1) in Windows 8.1 (standard edition, not Pro). This is a new Windows 8.1 installation. I have two 500GB drives attached to SATA ports, neither of which ...
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31 views

Unclear on how to enter and setup the RAID BIOS on a GIGABYTE GA-Z77X-UD5H LGA 1155

I have two Samsung 850 Pro 256GB SSD’s hooked up to a GIGABYTE GA-Z77X-UD5H LGA 1155. When I enter BIOS, it shows that I have two of the drives connected, and I have my SATA mode selection set to ...
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Internal SDD + External SSD (via firewire) RAID 1 and boot drive version control (like system-wide git)

I was thinking in a theoretical realm about a certain use case, and was wondering if anybody has ever experienced anything like this. If I were to set up my internal SSD and an external SSD ...
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682 views

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 ...
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Exchanging harddisk of Medion Akoya MD-98634 laptop

I am trying to replace the original 1TB harddisk of my Medion Akoya (MD-98634) with a Crucial BX100 SSD (250GB). This is what I found out so far: The original setup is running the 1TB HDD in a RAID ...
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Linux machine with RAID 1 not booting after failed drive

I’m not that experienced with Linux and am troubleshooting a machine that is no longer booting up. Originally it had two drives installed in RAID 1 and one drive failed. I took the good drive out and ...