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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Custom built server array

I have a pc that i have dedicated as a file server. It currently had 5 sata drives in it and has room for maybe one more. In the near future i am going to be building a new house. I would like to ...
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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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3answers
24 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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593 views

Did my case fan damage my harddrives?

I just had the weirdest problem: I installed two new fans (Zalman ZM-F3's) in my Antec Sonata II case, one as a replacement (at the back) and a new one for additional airflow (at the front). The weird ...
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72 views

Dynamic Disk (software RAID) not accessible after windows 10 upgrade

I have two 2TB drives set up as a single volume in Windows. In Disk Management these physical drives are listed as Dynamic. I set them up in Windows 7, and they continued to function fine when ...
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3k views

Synology NAS station - how to mirror 2 HDD (Simple how-to)

I have a following problem with my Synology disk station: I had one small HDD in Synology Diskstation, so I removed it. I bought 2 new HDD with same capacity. I transferred backup from old disk to ...
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6 views

Rampage IV Extreme RAID, don't even see a Ctrl+i option

Trying to do a RAID 0, went to the SATA settings, changed to RAID, didn't work. Try turning on hot plug, doesn't work. Tried IRST instead of RSTe, doesn't work. Disabled fast boot, doesn't work. Not ...
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7 views

Moving a Promise SmartStor Raid 5 to a Promise Pegasus2

Hi guys I have a Promise SmartStor DS4600 RAID server that is out of space (4gb). I want to move all the data to a new RAID server made by Promise (8gb or 12gb). I am having a really hard time ...
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578 views

How to setup a RAID for a fileserver?

I have been looking for about a week now at possible RAID options for the home file server I'm building. At first I was looking at RAID 5, but then read RAID 10 has faster read/writes. A few people ...
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81 views

Fail device in md RAID when ATA stops responding

I had created five 1TB HDD partitions (/dev/sda1, /dev/sdb1, /dev/sdc1, /dev/sde1, and /dev/sdf1) in a RAID 6 array called /dev/md0 using mdadm on Ubuntu 14.04 LTS Trusty Tahr. The command sudo mdadm ...
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2answers
3k views

misaligned raid partition in Ubuntu 10.04

I attached two identical hard drives to my linux machine. Then using gparted I formated the first 1024 mb at the beginning of each drive as linux swap space. Then I went into ...
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31 views

what is the best practice for file server setup? [closed]

what is the best practice for file server setup ? I am planning to build a home file server that has 25 4T HHDs. I would like to have some suggestions for Hard ware configuration I am looking for ...
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33 views

How to make the low cost , most efficient NAS raid with Raspberry Pi [closed]

I'm doing an experiment with my Raspberry Pi for education and giggles. I'd like to know which is the most energy and speed efficient option considering the materials I have and what I'm trying to do. ...
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14 views

Replace (non-raided) drive in raided server

Current setup: ~100gb disk (sda) with 4 partitions: /boot, /home, "system folders", swap 500gb RAID5-array (md0) with 1 partition: /var OS is Ubuntu Server LTS 15.04 on an old hp 32-bit system ...
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1answer
51 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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2answers
27 views

SSD (SATA) Disk along side RAID with 3 Disks

I have the P6T7 WS motherboard (https://www.asus.com/Motherboards/P6T7_WS_SuperComputer/) and wanted to install 4x 4TB drives as a RAID 10 on the ICH10R Serial ATA connectors (6 times) , I have also ...
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12 views

Are dd read/write tests using dsync reliable under RAID?

I'm performing performance testing of some new hardware, and I was quoted from a vendor what kind of performance i should get from a dd command using the oflag=dsync option. However this amount was ...
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1answer
907 views

mdadm RAID 1 - spare drive after SATA cable change

Yesterday, my hosting provider changed a SATA cable of one of my HDDs. When my server came back up again, cat /proc/mdstat showed this: Personalities : [raid1] md124 : active raid1 sda1[0] ...
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9answers
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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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1answer
47 views

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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2answers
98 views

Raid mode 5+ has collapsed on my Mediasonic HFR2-ASU3S2, how to get data back?

I have this: Mediasonic HFR2-ASU3S2 I set it up with 4x 4tb drives that were meant for NAS, all WD drives. Now when I plug in the Mediasonic HFR2-ASU3S2 I get a warning pop up asking me if I want to ...
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0answers
21 views

Can I create Raid Secondary Storage in Windows 8.1 Pro?

I have Asus MAXIMUS V FORMULA Z77 chipset motherboard It has: 2 Intel sata z77 6.0 Gb/s controllers (used currently) 2 Intel sata z77 3.0 Gb/s controllers (used currently) 4 Asmedia sata z77 6.0 ...
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1answer
842 views

File History not working Windows 8.1

I have file history turned on yet no data is saved. When I turn FH off and then on I get an error message: "File History has found files that are encrypted with Encrypting File System, on a network ...
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3answers
399 views

3TB drive on BIOS system

I have a HP Proliant microserver gen 8 on which I am planning on installing Debian. I was thinking of setting up a raid-1 configuration through the built in raid controller using two Western Digital ...
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4answers
15k views

ZFS Beginner Setup with Different Size Drives

Sorry for the noobie questions, I've been Googling all sorts of walkthroughs to create my ZFS raid, but I can't seem to find the correct links for the answers I'm looking for. This is my first ...
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1answer
80 views

Correct kmod-megasr driver to install CentOS 7 on Intel Embedded RAID Technology II?

I am trying to install CentOS 7 on a server using RAID 5 on Intel Embedded RAID Technology II. I did need to install a special hardware key to unlock the RAID 5 feature. I have succcessfully ...
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2answers
250 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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1answer
24 views

TestDisk failed in Deep Search?

I'm trying to recover data from a colleague's 4TB external G-RAID drive. I've saved the main partition from the quick scan result, but that didn't help, so i spent the past week doing a Deeper Search. ...
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3answers
443 views

Adaptec Raid Controller 6405E slower than onboard raid?

Running on Windows 8.1 x64. Raid is 0 on two Samsung Evo SSD. Both read and write cache is enabled. Here's result from onboard raid (ASUS-P9X79-E-WS): And here's from the dedicated raid controller ...
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Repair btrfs RAID? Error: Inappropriate ioctl for device

I have a RAID5 btrfs with 8 disks and a hard disk died and just disappeared from the list. Now I tried removing it but got an error: ERROR: error removing the device '/dev/sdb' - Inappropriate ioctl ...
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1answer
29 views

No RAID boot menu on system start up

I have an HP Pavilion Elite HPE. I used to have an onboard RAID boot up screen but now I do not. Could this have vanished based on a glitch with using a different graphics card or the slow that it is ...
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48 views

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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1answer
76 views

Software/Hardware RAID vs Windows Storage Spaces for DAS

I plan to upgrade my Intel RST Software RAID1 setup with 2 internal SATA drives to something more versatile: Drives need to be external (they have to reside in an enclosure connected to PC via eSATA ...
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1answer
38 views

Hardware RAID10 HPA recovery

I have a hardware RAID 1+0 based on external CFI-B8253JDGG DAS. It was connected to PC with eSATA and contains 4x1TB HDD (Total capacity is 1.82TB in RAID10). Some days ago I tried to connect the DAS ...
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4answers
87 views

Is raid 1 overkill for a home user

I'm looking to centralise my home data - pictures/videos/music and so I have ordered a synology ds214 and a couple of 2tb drives. Since I've been doing my research I've come to realise that mirroring ...
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software raid1 compatible on OSX and Ubuntu on external disks

I'm using external disk dock with two disks and want to setup software raid1 so that the setup works when usb3 mounted from both ubuntu and osx. How is this possible?
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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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2answers
69 views

Which is faster, 2 SSD drives , each plugged into a sata 6 port on RAID 0, or 1 SSD drive plugged into a sata express port (10gb)

I have a new motherboard and it has 1 sata express port that's up to 10gb transfer. So I'm wondering which would have better performance? 2 SSD on raid 0 in a sata 6 port or 1 SSD on a sata express ...
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23 views

Raid drive cannot be detected

Only yesterday I bought two new 2GB Seagate drives and set them up as raid and installed lubuntu. It was working fine and there was no problem but today I made the very bad decision of swapping over ...
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6k views

Why can't RAID 0 utilise all disk space on two different sized disks?

To quote the Wikipedia article on RAID: A RAID 0 can be created with disks of differing sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk. ...
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32 views

Use 4TB partition with old NTFS-3G which doesn't support GPT and RAID

I've a D-Link Router (2750U) which has a USB port and FTP Server. I've also a 4TB External H.D.D which I want to use as one partition with this Router as my home cloud. I don't want to split this ...
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39 views

Dual boot Win8/Linux on Asus Zenbook UX301 keeping intel imsm RAID0

I have Asus Zenbook UX301 with Win8 preinstalled. I would like to have a Linux installed in dual-boot configuration. However, Windows is using the notebook 2 SSDs as intel RAID0 (rom-based RAID, ...
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26 views

Parity errors after verify with Intel RST

I have Intel RST RAID 1 running on a Windows 7 machine. I have it set to do a verify and repair every week. I frequently notice parity errors, some weeks over 100 for a 1 TB RAID 1 array. I've ...
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1answer
39 views

RAID 0 speed improvement

I've got a free Samsung EV0 840 120Gb from my uncle. I already got a 250 EVO 840 in my computer. Now I was asking myself if I got a significant speed boost if I put them in RAID 0. I know the total ...
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3answers
303 views

RAID recovery - planning for the worst

I've considered getting a commercial RAID NAS, e.g. QNAP or Synology but hesitate because I want to be absolutely confident regarding disaster recovery. I'd prefer not to be at the mercy of the ...
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1answer
41 views

How to create bootable CentOS7 USB drive with FakeRAID drivers?

I have a few older servers that only have one available USB port, and no CD-ROM drives. I have successfully created a bootable thumb drive using dd to copy the CentOS-7-DVD isos to thumb drives, but I ...
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3answers
5k 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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1answer
27 views

Should a Linux Swap partition be on the RAID?

When setting up a new system, if I am planning on mirroring two hard drives, what should I do with the SWAP area? I can think of three things I can do... Do a mirror of the SWAP partition Stripe it ...
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28 views

Missing Operating System Win 7 RAID 0 setup

I have 2x1TB RAID 0 setup on an Asus P8Z77-V PRO Motherboard.Coming out of BIOS my PC just went to a blank screen "Missing Operating System". I have tried booting from the original Win 7 disk, ...
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26 views

Optimal load balancing between two hard disks. Does RAID 1 do the trick?

I am looking for a linux disk system for streaming media purposes that would do smart load balancing and minimize hard disk wear. To illustrate my points, lets take a physical hard disk device and ...