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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Failover of Windows Storage Spaces

I am building a home server with an HP Microserver hardware. I installed Windows Server 2012 Datacenter on it. In order to take advanced of data protection, but without spending large money for a ...
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Alignment with RAID-6 (mdadm) + LUKS + XFS

What I want: I have a 4x4TB RAID-6 array with mdadm. I want the storage to be encrypted and plan on using LUKS. I will most probably use XFS as filesystem. I will add more disks to the array as ...
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46 views

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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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 ...
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1answer
9 views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
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How can I make mdadm auto-assemble RAID after each boot?

I successfully created a RAID (mirroring) by utilizing mdadm. However, I must run the following commands after each boot: mdadm --stop --scan // to stop /dev/md127 - I don't know where the number 127 ...
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1answer
20 views

Need application to run without root access

i try to build my local services system inhouse, and to thant i need to learn how i can give access to a single user with out type a root access when i do it, or i need to know how i can call the ...
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disable driver signature check while installing windows 7 [duplicate]

is there any possibility where i can disable the default driver signature check while WINDOWS 7 Instalation?. My problem is that: i had bought an asus mobo with inbuilt AMD raid card and i want to ...
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Is it safe to put harddisks of a md-software-raid to standby?

I have a home-fileserver with 6 desktop harddisks in a md-raid. The server isn't accessed a lot, so I think it would be good for the harddrives to go in standby-mode after some idle time (e.g. with ...
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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 ...
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How to enlarge RAID5 array with MegaRAID WebBIOS?

I'm a little confused with RAID5. I created a RAID5 array group from WebBIOS with 6 drives. Then created an XFS partition on this RAID5 drive. How can I enlarge the RAID5 without losing data? In ...
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1answer
32 views

Install grub raid1 & lvm

I have installed an Ubuntu Linux on a machine where there was a RHEL (from Dell) At the end of the installation I got a message that GRUB2 could not be installed. So I booted into a Live Linux (from ...
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3answers
4k views

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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Recovering data on 20TB RAID 5 NAS, overwritten by 500gb RAID 1

I have a Linux gateway with 2 500gb drives in software RAID 1 for system. /dev/sda = RAID 1 /dev/sdb = RAID 1 /dev/sdc = RAID 5 (NAS 12 drives iSCSI, /home directories) While replacing sdb, weird ...
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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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13 views

Is it possible to restore RAID data when a RAID restoring process was crashed?

I have a 4 HD RAID. One of then was crashed and during the restoration process another second one HD has crashed too. This is very improbably but it happened. So, is there any software to recovery my ...
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Degraded RAID 5 array, can't add replacement drive

So I've had two drives that have been marked as faulty spares in my RAID, I've removed them then I tried to --force assemble the RAID but this came up - mdadm: /dev/md0 assembled from 2 drives and 1 ...
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1answer
30 views

Multiple PCIe Controllers

I am trying to exceed the 6Gb/s barrier of SATA3 I want to use RAID 0 on multiple SSD's and I am trying to come up with a (relatively inexpensive solution) I have 40 available PCIe lanes /16 are being ...
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4answers
6k views

Does fake RAID offer any advantage over software RAID?

Does a fake RAID controller do any useful work or is it just like a place where to store the parameters? I know that Linux offers much more flexibility than my poor on-board controller, but this is ...
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1answer
51 views

ZFS (RAID-Z1) or “hardware” (RAID 5) on Linux system?

I have never put together a RAID array before, but i think i understand the concepts behind most raid types from my reading. Ordering three 3TB drives (WD red) to use in a xeon e3-1231 v3, 16GB ...
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34 views

RAID 0 now showing as “unallocated”

I have a 6TB RAID 0 consisting of 2x3TB WD Red drives. It's been working fine but recently I went on my PC (which was still turned on and had been for a few weeks) and the whole partition was showing ...
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53 views

Ideal Setup for vSphere Hypervisor

I just picked up a Dell R720 for my company, it's got plenty of resources where I feel I can run multiple VM's at the same time. Here are the specs. Intel Xeon E5-2620 (2) 8GB DIMM (8) 146GB SAS ...
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How to raid 0 on laptop

I Have N56 laptop, so i decided to upgrade it using pair of 250gb ssd drives(the secondary could attached instead of optical drive). Now i want raid them to increase the performance. after some ...
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1answer
8 views

mdadm build legacy array on boot

I have RAID0 that was built using windows dynamic disk. I've read that this is a legacy array and can be assembled using build in mdadm. I've gotten the array to build and mount using the following ...
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20 views

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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Is there a RAID 7?

One of my friends at school was talking about a RAID, he said there was a RAID 7, as to my knowledge no such thing exists. Could someone clarify? I don't think there is but just making sure.
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4answers
26 views

How do you back up a RAID 5 server?

I see many information on how to back up single drive, transfer information, or even use the dd command. Originally, I had a 1 disk server, and when I migrated it to a higher end server, I went ahead ...
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22 views

how to mount a XFS filesystem in LVM volume with RAID0 having a bad disk?

I have a small NAS with two 500GB disks in a RAID0 (JBOD) setup. (I know, I know, big mistake... as you will see...) Now, one of the disks started to fail (Murphy is always right, isn't he...) I ...
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1answer
62 views

Intel Rapid Storage Technology made HDD dissapear

Recently my laptop stopped booting windows. When I turned it on, Intel Rapid Storage Technology 12.7.0.1936 window showed up and said, that one of my SSD volume is disabled and asked me to press ...
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26 views

Mirror new HDD with old (raid 0) HDDs

So after fighting every day with my slow 3TBx2 Raided HDDs I decided to get a new one that's just 4TB (as I don't use more than 2TB currently). It's a WD Black HDD that looks really promising. ...
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1answer
43 views

gparted live CD won't move/resize unmounted partition

GParted live will not allow me to resize/move partition /dev/sdb5: No other windows (such as error dialogs) appear. The partition is part of a RAID device, but I stopped all raid devices before ...
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Are RAID 5 systems suitable for larger disk sizes? [closed]

Why is it generally considered that RAID 5 systems are not suitable for larger disk sizes? Is the same true for RAID 6? Reference: http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/
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2answers
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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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Intel Rapid Storage Technology install failure

When I try to install IRST, it runs for a bit and then a popup appears saying that setup.exe had a problem. Expanding the details produces this: Problem signature: Problem Event Name: ...
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1answer
16 views

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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1answer
60 views

System went read-only suddenly

My web server (Linux, Debian Wheezy) has suddenly gone read-only, MySQL have crashed (but Apache didn't) - giving errors when pressing tab to complete file name as: bash: cannot create temp file ...
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28 views

Bad Magic Number in Superblock or Not a Block Device

I'm having some real problems getting a drive to have any working partitions on it at all. The drive is a 2Tb one from a NAS that I'm trying to repair. I've written zeros to the first 77Gb of the ...
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Intel RST turned a disk off

I have an Asus ROG laptop and I got a BSOD while I was working and then after the restart, one of my partitions disappeared. This used to show two disks but it only shows 1 disk and the cd drive. ...
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2answers
966 views

How to remove a drive from a non-standard 2-drive RAID 5 array?

There is some information available on shape changes in RAID arrays but I'm a little nervous and would like confirmation: Problem: I have 2 500GB drive as software raid 5 (mdadm). I would like to ...
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43 views

Can't install Windows 7 x64 on SSD drive

The title explains my whole problem, I had Windows 7 installed multiple times on the same SSD drive. But when I attempted to reinstall it last night it gives me this error(translated from dutch): We ...
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147 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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How to tune the XFS file system when you use LVM striping on top of HW RAID?

For example your LV strips (512k) over two PVs each HW RAID 7disk x 1MB RAID6. (what about if the LV is mirrored?) I cant seem to find information on tuning the su/sw values in this configuration. ...
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3answers
616 views

Merge Two Folders To Act As One (Software Raid 0?)

Using Windows 7, I'm trying to setup what I've come to call a "Software Raid of Folders", not completely sure it's the right term, but I'm sure anyone who knows the true term will understand what I'm ...
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1answer
49 views

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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2answers
145 views

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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4answers
2k views

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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1answer
1k 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 ...
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2answers
1k views

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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28 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:\ ...