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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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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8 views

RAID1 with 2x Samsung 850 LSI 9260-8i very slow

I installed above card into my system. There is another Samsung 830 (bootable with Win7) attached to motherboard. So, when I do a speed test with HDTune Pro - read speeds of old single 830 is around ...
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16 views

Mirroring 1 6TB Drive onto 2 3TB Drives

I have a 6TB drive where I store all my media (on a Windows Server 2008 R2 Server). I also have two 3TB drives that I would like to use to backup the 6TB drive. What is the best way of accomplishing ...
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5 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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26 views

RAID 5, Read Speed and Caching [on hold]

I currently have two WDC Black 4TB in Raid 1. I have a lot of large files on drives (ISOs, MSDN, etc). I was thinking about adding another drive for a RAID 5. Will increase sequential speed by ...
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19 views

Which cloning software supports Intel Smart Response? [closed]

I have two disks, one HDD and one SSD. And I have used Intel Smart Response Technology to accelerate my HDD. I want a cloning software to clone my HDD which takes into consideration the fact that the ...
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11 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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24 views

mdadm: drive replacement shows up as spare and refuses to sync [migrated]

Prelude I had the following devices in my /dev/md0 RAID 6: /dev/sd[abcdef] The following drives were also present, unrelated to the RAID: /dev/sd[gh] The following drives were part of a card reader ...
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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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16 views

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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24 views

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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How can I change the Physical ID # of a HD to resolve a conflict?

Windows 8.1 Sabertooth X79 Intel RAID0 with two Samsung 850 Pro SSDs. I have a couple of 3TB HGST drives I usually keep in an external multi-bay enclosure connected USB but I'm trying to put them ...
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53 views

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

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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16 views

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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13 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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25 views

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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10 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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19 views

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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1answer
18 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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36 views

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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33 views

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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68 views

Recovering 1TB hard drive split into two 500GB drives without formatting

I am using Windows 7 and am trying to recover two working drives. The hard drive in question was: http://www.newegg.com/Product/Product.aspx?Item=N82E16822204022 I am pretty sure they were ...
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19 views

Cannot get RAID working with Mac Mini after adding drive

I had a working RAID array with 3 2TB drive in an external Startech.com SATA enclosure that was set to RAID5 I wanted to add another 2TB drive, so I added the drive but according to the manual, I ...
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26 views

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 ...
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17 views

How to configure RAID on Toshiba Satellite P500-15e laptop?

I had bought a laptop (Toshiba Satellite P500-15e) when studying in France. Once I installed OpenSuse linux and regarding the fact that I didn't know anything about it, I had to erase it. ...
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2answers
36 views

RAID 1 accidentially booted in AHCI mode

I have two Samsung 840 EVO SSD's in RAID 1 (Asus P87-Pro and Intel Controller) with Windows 8.1 Pro on it. After a BIOS update, apparently all BIOS settings was reset, which apparently changed the ...
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140 views

How to install linux mint 17.1 to encrypted raid 0 array

I just got a new SSD and I wanted to install Linux Mint 17.1 to a raid 0 array of SSDs. I also want the array to be encrypted. I tried the following guide and got mdadm to setup a software array and ...
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47 views

Mix 3 different sized hard drives into a RAID 5

I’ve got three hard drives different sizes and I want to create a RAID 5. The three drives—all Seagate—are: 1.5 TB 3 TB 700 GB Is there a way to RAID these or is it possible to do the folloiwng: ...
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RAID5 active device failed during reconstruction

I have this Linux RAID5 array with 4 2TB harddisks, with 3 active device and one spare, giving me a total disk size of around 6TB. Recently one drive (sdd) is starting to give me some SMART errors, ...
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31 views

My CentOS RAID-10 array won’t boot

My RAID array won’t boot and gives a kernel panic. Any attempt to kill init message and goes into endless reboots. Motherboard is a Supermicro 2P with Opteron 2376 4-core CPUs, CentOS software RAID, ...
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Rebuilding FakeRAID RAID 5 with new disk, no partitions show up, invalid PMBR

I have a RAID 5 array with 4 2TB disks on a HP Z800. One disk failed and was swapped out for a new one. I went into BIOS Intel Storage Matrix Utility and set the Array to rebuild with the new disk. ...
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37 views

Problems creating a bootable RAID volume when imaging from HDD to SSD

I have an old Dell XPS420 with an Intel RAID controller on the MB. For years I’ve had RAID 1 enabled on a 2x1TB array set up as two volumes: A 300GB volume which has Windows 7 installed on it and the ...
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45 views

Recover data if PC (motherboard) fails with software RAID 5

I'm planning to implement a RAID 5 (or 6) system on an old PC (windows or linux). It doesn't have HW RAID 5 support so I'll do it via software (e.g. windows integrated RAID). Will I be able to ...
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30 views

How to transfer software raid from windows to linux?

I have a software raid 1 on my windows 7 machine over 2 hard drives and for various reasons, mainly my windows 7 machine wont work correctly over the lan for some reason and no solution in sight and ...
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20 views

Is there a way to reformat a RAID array without losing existing data on the disks?

I have a RAID 10 comprised of 4x 4TB disks. It is currently formatted in XFS on a CentOS server (The server's root directory is is not on the RAID), and I've been looking at replacing XFS with ZFS ...
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37 views

upgrade (software) RAID 1 capacity

I am upgrading a software RAID 1 array (/dev/md0) from 2TB drives (sda and sdb) to 4TB (sdc and sdd). Straight forward; ext3, single partition, no MBR, no LVM. In the end, I would like to have two ...
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29 views

What happens when a RAID rebuild fails due to URE?

I understand that when a disk fails in a RAID configuration, whatever the RAID level you're using (1, 5, 6, or 10), you need to replace the failed disk and the array rebuilds. Now with large capacity, ...
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26 views

Linux fault tolerant array for home server

Is there any method of creating a fault tolerant disk array with a mix of disks? I intend to use debian linux stable as a file server for home. The data is going to be cloud backed up but I don't ...
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40 views

Do I need a UPS with a RAID-configured NAS

In order to keep my home file archive safe, I've bought a Synology NAS and configured it to use a Synology Hybrid RAID configuration. Now almost a year since I started feeling safe about the years of ...
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233 views

How do PCI express RAID cards work?

I was recently playing with Xen server which supports hardware RAID only and as I always used Linux MD's only so far, I have no knowledge of hardware RAID at all. I was looking for some cheap hardware ...
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1answer
101 views

Two SATA-3 vs four SATA-2 SSD drives in RAID 0 [closed]

I have a relatively old motherboard (msi BIG BANG-XPOWER) that has 8 SATA ports, 6 of which are SATA-2 and 2 of which are SATA-3 and I'm thinking of creating a RAID-0 array of two or four SSD drives. ...
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13 views

Reading a single disk from RAID1 set (Intel Matrix)

I have an Intel RAID (ICHxR), where a RAID1 set has a failed disk. The problem is that the RAID volume is inaccessible, even though there's one healthy drive still in it. I tried removing the failed ...
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1answer
41 views

Windows restore saying partition is too small. It isn't

I built a media PC years ago with three 750 GB drives in a Raid-5 configuration. This allowed for 1.5 TB of space and had redundancy. At the time I didn't know how bad performance was with RAID. I ...
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1answer
159 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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64 views

Speed up ubuntu on desktop by moving some directories to a faster storage

I want to speed up my ubuntu install a bit. I was using a RAID1 setup for the whole system (separate md for /home and /). Now (thanks to ...
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29 views

Hp ML310e gen8 + P222 + debian / ubuntu

Is possible to run this configuration 2 disk raid 1 on b120i integrated controller for linux debian or ubuntu system, and 4 disk raid 1+0 on P222 controller for data storage on Hp ML310e gen8 ...
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1answer
80 views

Hard disk error in Intel Matrix Storage Manager

I have two hard disks, both 160GB, and with Intel Matrix Raid on these two disks, I created two volumes Volumne0 Raid1 Volumne1 Raid0 Now, one of the hard disk shows error in the Intel Matrix Raid ...
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55 views

How would hardware RAID compare to Windows software RAID?

I recently bought a new PC with a Gigabyte Z97P-D3 motherboard. One of the things it supports that my old machine didn't is RAID so I had planned to transfer my 2x 1TB hard drives from my old machine ...
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253 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 ...