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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6answers
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Can someone explain RAID-0 in plain English?

I've heard about and read about RAID throughout the years and understand it theoretically as a way to help e.g. server PCs reduce the chance of data loss, but now I am buying a new PC which I want to ...
0
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0answers
12 views

How exactly do you hook up 16 drives to this RAID card?

http://www.lsi.com/products/raid-controllers/pages/megaraid-sas-9240-8i.aspx#tab/tab1 I'm utterly confused only because I'm not versed as well in enterprise storage capability and solutions. The ...
0
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1answer
27 views

mdadm: Reactivating RAID6 array after improper shutdown

I have a seven-disk RAID6 array on a file server. The server experienced a crash and a hard reset was required, resulting in an improper shutdown. Note that I/O activity was likely occurring on the ...
0
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6answers
4k views

After enabling raid0, blue screen of death

Im trying to get a raid0 setup going. I have a 750 gb hdd with the OS on it and two 80gb HDD. For right now, I just want to raid0 on the two 80Gb hdd. When I enable raid in my Bios, Win7 has a BSOD ...
1
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0answers
9 views

RAID configurations are resetted after reboot-Ubuntu Server

I have configured software RAID 1 in Ubuntu Server. I have created RAID 1 and now one of the Disk fails so I removed it. I had attached a new disk. Created partitions as same like /sda from fdisk. ...
19
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8answers
22k views

Simple mdadm RAID 1 not activating spare

I had created two 2TB HDD partitions (/dev/sdb1 and /dev/sdc1) in a RAID 1 array called /dev/md0 using mdadm on Ubuntu 12.04 LTS Precise Pangolin. The command sudo mdadm --detail /dev/md0 used to ...
2
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0answers
20 views

Courting Disaster with fakeRAID10 (Dual Boot Win7,Ubuntu14.10)

Over the past several weeks (!), I have been trying to set up a dual boot with Windows 7 Enterprise and Ubuntu Desktop 14.10. The motherboard is a Sabertooth x79, and I wanted to install everything ...
0
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0answers
8 views

can i setup ISRT with a non RAID motherboard

hey there i was wondering if i could setup Intel smart response technology(ISRT) on a non RAID motherboard with 20GB of mSATA SSD... i mean the only two boot options available in my motherboard are ...
1
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0answers
13 views

Does the RAID 5 parity drive have to be same size as the rest of the array?

In the most basic RAID 5 array, does the parity drive have to be the same size as the other 2 drives? Standard Array: 1x4TB Drive (Storage) 1x4TB Drive (Storage) 1x1TB Parity Drive Or will the size ...
13
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5answers
20k views

How does parity work on a RAID-5 array?

I'm looking to build a nice little RAID array for dedicated backups. I'd like to have about 2-4TB of space available, as I have this nasty little habit of digitizing everything. Thus, I need a lot of ...
1
vote
1answer
54 views

AMD RAID controller sees drives & RAID 1; Windows & RAIDXpert don't

I've got two SSDs I'm trying to work in RAID 1 on a Gigabyte GA-990FXA-UD5. Here is the weird combination of all the different variables with a fairly ideal testing scenario (plenty of spare ...
0
votes
1answer
43 views

Three disk (possibly RAID) data recovery

I have on my desk three 160 GB disks that were once part of an HP Proliant Windows 2003 Server. They may have been part of a RAID configuration of some sort. They may or may not be damaged in some ...
0
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3answers
47 views

Is it possible to configure a multiplatter hard drive as separate drives?

I am looking to set up a RAID mass storage array, and have been reading about how large disk sizes are jeopardising rebuild because of the time required to execute a full rebuild and the chance of ...
0
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0answers
13 views

Delete RAID Array via PERC BIOS?

I have a an older PowerEdge 800 with a PERC 4/DC controller and RAID 1 array. Its running Windows Server 2008, and it serves as my file server (among a few other roles). I've swapped out all the ...
4
votes
1answer
40 views

Is it safe to stop a RAID 5 expansion?

I'm having some issues expanding a RAID 5 array on a Synology DS413. The drive has gone from 3 x 3TB WD Green drives to 4 x 3TB. I started an expansion operation and it's been stuck at about 60% and ...
12
votes
2answers
7k views

Can I setup a software RAID in Windows 7 using Virtual Hard Disks?

Well, the title of my question pretty much sums it up, but let me elaborate. The main idea of what I want to do is as follows: 1) I have two separate hard disks, with nearly equal performance. I use ...
0
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1answer
28 views

software raid mirror verification

I am created the raid 1 mirror , I have made two partitions in in single hard drive they are sdc1 and sdc2, my question is how to verify that data is being written in both drives and how can I know ...
0
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0answers
27 views

Why does UEFI BIOS only identify a 2TB drive on a 25TB virtual drive?

I configure a RAID6 using 16 2TB disks, and finally get a 25TB virtual drive as shown in LSI MegaRAID BIOS. And then I boot via a USB stick and try to install 64bit Ubuntu 14.04 on it. At the ...
2
votes
2answers
62 views

Cache of SCSI disk

I have a SCSI controller (HP Smart Array 642), using cciss driver on Linux, which is connected to several SCSI disks. I am trying to optimize the communication between these devices and came to the ...
3
votes
0answers
17 views

SSD RAID in Haswell NUC with Ubuntu: Does TRIM work?

I want a low-power, small, silent x86_64 Ubuntu computer with storage that's resilient against hardware failure of a drive. I'm thinking of buying D54250WYKH or D34010WYKH, one mSATA SSD and one 2.5" ...
1
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0answers
96 views

gdisk doesn't recognize RAID0 disk as size of whole array?

I put in two Samsung 840s at 256GB and RAID-ed them together and installed Windows 8. I'm having trouble using gdisk to get ready to install Linux. gdisk sees the array, /dev/sda0, as a whole ...
0
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0answers
19 views

NAS - failed hard drive - unable to mount externally

I had two 2TB hard drives in my Dlink DNS-320 NAS, RAID 1 mirrored, working fine up unti. a few days ago, I heard some clicking from my NAS (which points to HD failure), and then I could no longer ...
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1answer
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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0answers
16 views

Can I reuse an overheated HDD after formatting in a ZFS RAID0?

I have a WD50EFRX which overheated according to SMART data (95 degrees celsius) and damaged some blocks (raw value of Raw Read Error Rate ~ 22000). There're no other values besides the Raw Read Error ...
0
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0answers
14 views

LaCie 2big, use existing disks (not formatted by the device)

About the LaCie 2big Quadra: I have 2 x 1T disks that have been formatted and used on Linux (not on LaCie). It happens that both disks have the exact same partitioning, while the content data is ...
1
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0answers
17 views

RAID: Switched from W2K12 Hyper-V to Ubuntu

Until yesterday I was using Windows Server 2012 Hyper-V. I had two RAID sets: one 600GB (2 disks) and one 3TB (2 disks). The first was connected to Windows Server. The second was passed through to an ...
0
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0answers
9 views

3ware RAID controller kicked out two drives from unit after replacing another degraded drive

One of our servers had a degraded drive and after replacing it, two other drives were shown as "NOT PRESENT" in the web interface. The whole RAID unit is now inoperable and I'm not sure how to re-add ...
1
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1answer
20 views

How to Create Virtual Block Devices

I want to create multiple virtual block devices like /dev/sda and then use them to create an md device for test purpose. I have mounted my root filesystem on /dev/sda1 and don't have extra space to ...
0
votes
2answers
98 views

How do I fix my RAID array after NVIDIA GeForce Experience mangled it?

Alright, so I decided to try upgrading my graphics card driver today. I believe my previous version was 331.40 for my NVIDIA GeForce 580. I also have a GeForce 9800 for PhysX. So I started about an ...
3
votes
0answers
28 views

Linux access to Windows 7 dynamic volumes (striped or mirrored)

I'm considering setting up a dual-boot system for the first time for many years. My plan for the system is to set it up as follows: SSD for both system partitions 2 identical hard disks, split ...
3
votes
1answer
33 views

Is it possible to use RAM in a RAID-1 configuration?

If I have two or more memory modules, can I get a system to use them in RAID-1 ("RAIM"?) as a poor-man's ECC?
9
votes
2answers
1k views

Can a failed Btrfs drive in RAID-1 be replaced live?

I am trying to decide on a filesystem and would like to know if it is possible to replace a failed drive in btrfs RAID without downtime. Suppose I create a new btrfs filesystem using the command ...
2
votes
1answer
6k views

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 ...
0
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0answers
24 views

Windows 8.1 incorrect file size

I have a QNAP NAS attached to my home network with 2*2TB drives in it - RAID 1. I have a windows mapped drive to a share on the NAS from 2 machines - 1 Win7x64, 1 8.1x64. When I select a group of ...
2
votes
1answer
148 views

Btrfs raid level for large NAS (8+ 5tb disks)

I'm planning to build a new NAS to store a large amount of media (20tb+). I would like to use btrfs for both the NAS and the backup (might be a separate system, not sure yet) I want to use raid1 or ...
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votes
0answers
22 views

File read write performance and stability over multiple disk failure

Currently I am using 2 drive bay Synology NAS, Running out of space and performance, hence planning to build own NAS with 4 or 8 (6+2) Hard drives. In Synology their is an option for SDD Cache (RAID0 ...
0
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0answers
14 views

Server drives gives input/output error when formatting in Fedora [migrated]

I am at a total loss as to why this is happening. I have tried everything I can think of. I am trying to format a drive in Fedora to use in the server. Every time I try to format it I get a ...
0
votes
2answers
2k views

PCI-E x8 Raid Controller in a x4 Electrical/x16 mechanical slot

After exhaustively searching around on the internet and here at superuser I couldn't find a definitive answer to this. I've heard how with some devices they work with less pci-e bandwidth even if they ...
1
vote
1answer
38 views

Is it possible to config RAID 1 ( RAID 0 (500GB + 500GB) + RAID 0 (1000GB) )?

We have a server with 2 500GB hard drives which are currently mirrored (RAID 1), but we're running out of space now. So, we have one more bay available, so my question is: if we buy 1 TB hard drive ...
1
vote
1answer
65 views

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 ...
0
votes
1answer
26 views

Would software RAID 1 be broken if I move both drives to a new PC? [duplicate]

Does a RAID 1 setup by software (win) break once you move both drives to another Win PC? Is there any way to bind the drives together so that the RAID setup stays, even after changing motherboard/cpu? ...
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votes
1answer
57 views

4-bay NAS write performance RAID 5 + SSD vs RAID 10

I am planning on buying a new NAS (QNAP TS-453 Pro) for my Home Office. The NAS has 4 HDD bays and supports SSD Caching. Hence, I was wondering which setup would probably be faster in terms of write ...
0
votes
0answers
19 views

How to setup RAID for data and AHCI for OS

I just bought 4 hard drives containing 4 TB each which I hope to set up in a RAID 10 setup, giving an apparent continuous 8 TB hard drive that is backed up. I also have a 256 GB SSD and a 1TB Hard ...
0
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0answers
28 views

Add 2 HDD connected via USB to Synology DS211j using Raid 1

I have a Synology DS211j and 2 old 2TB S-ATA HDD. What I plan to do is to buy two cases for these two hard disk drives that allow for connecting the hard disks to my Synology using the USB port. I ...
0
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1answer
51 views

Recovering software raid

I have a 3-disk software raid 5. Two disk appear to have failed at the same time; their number of Events is the same, while other third disk's is higher. I have copied all three disks into new ...
0
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0answers
34 views

Is it possible to clone previous boot disk to new imsm raid array?

A PC with a hard drive 750GB. The hard drive has one partition with Vista and several partitions with Ubuntu 14.04. I mainly work with Ubuntu but occasionaly I boot Vista. Recently, the drive's smart ...
0
votes
1answer
817 views

Moving RAID 5 to new motherboard

I'm moving a RAID 5 controlled with an Areca ARC-1110 PCI RAID card to a new motherboard. How do I ensure my array stays intact through the move?
0
votes
1answer
22 views

Bootable RAID1 instead of extra SATA drive

Here's the deal as a web developer I am total rookie in the hardware stuff, but since we make more money now and tried to experiment some stuff. I got this Raid1 (4 SAS Drives) and extra 3TB Sata ...
-1
votes
2answers
53 views

Seagate st3000dm001-9yn1 smart attribute [b8] [closed]

Seagate st3000dm001-9yn1 smart attribute [b8] The status of this smart attribute is showing: failed b8 Unknown Attribute 99 30 30 FAILED Where can I find more info about the 'unknown' [b8] ...
0
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0answers
45 views

Mirror / backup laptop btrfs drive to sometimes connected external USB disk

I have a laptop with an internal drive using btrfs. There are several subvolumes and snapshots on here. I want a copy of this drive to be made periodically to an external USB disk of approximately the ...