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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Is there a chance to lose data if I switch RAID to AHCI

I have Windows 7. The boot drive is NON-raid SSD. I also have 2xHDD RAID1 (just data). RAID is Intel Matrix (or whatever the latest name for it). I installed Windows in RAID mode What might happen ...
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Is hardware RAID worth it? [closed]

I am planning to build a home NAS server, and have managed to get my hands on the following- Core i3 3220 Ivy Bridge CPU 4 GB Kingston RAM Basic motherboard with dual gigabit LAN port 4x WD 3TB HDDS ...
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Is it possible to change a Dual SATA RAID enclosure to a NON-RAID enclosure?

just wanna know if it possible to change a Dual SATA RAID enclosure with a normal USB2.0/3.0 enclosure, like change it to single HDD drive. will it have any problem like cannot detect on PC? Cos I ...
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3answers
2k views

Detecting when a server is running on UPS battery

I have a home server (HP Proliant ML310 G4) that I bought from my employer a month or so ago. The server runs Debian Linux and I use it for just about everything. I can get away with doing this ...
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107 views

Booting EFI disks in BIOS system

I have a Debian-based system with three drives in it. All three drives have the following partition layout: Model: ATA ST4000DM000-1F21 (scsi) Disk /dev/sda: 4001GB Sector size (logical/physical): ...
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189 views

Synology DS1010+ shows degraded under status

As the title says I've got an error on my friend's NAS this evening. Even when I check that disk, it said that it's "abnormal" under smart test but the status shows "Not initialized". Under the ...
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218 views

What is “2LUN” mode in connection with RAID?

I've came across RAID products that also list JBOD (just a bunch of disks) mode and 2LUN mode. What the heck is 2LUN mode? I could not find a description; the closest thing seems to be LUN 'logical ...
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38 views

Why do you lose a drive when configuring RAID 5?

RAID 5 requires a minimum of three disks in order to work. Say each disk is 2 TB, and you have four disks, for a total of 8 TB. In RAID 5, your total capacity drops to 6 TB. Why? If the "spare disk" ...
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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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3k views

How to configure raid on Gigabyte GA-970A-UD3

I am trying to setup RAID 0 in the BIOS of my motherboard: Gigabyte GA-970A-UD3. I have enabled RAID in the BIOS SATA mode, and I get the option to hit Ctrl+F to enter RAID option ROM utility. When I ...
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63 views

Do i need a motherboard that supports raid to use a raid controller?

I want to setup a raid 0 to run windows on. Because windows will not run on a dynamic disk, I want to use a pci express raid controller to be able to install the os on it... But i have a few ...
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108 views

RAID1 for storage only without reinstalling Windows

I have a Z87-A motherboard. My main (Windows/Program) drive is Samsung Evo 840 256GB SSD and my storage drive is a 2TB Seagate Barracuda HDD (ST2000DM001). I bought another one of the Seagate HDDs for ...
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2k views

How to enable Samsung EVO 840 mSATA SSD Self Encrypting Drive with Intel RST RAID 0

I have an MSI GT60-2OD (Haswell MB, UEFI enabled w/o CSM) with 3 Samsung EVO 840 mSATA SSD drives in RAID 0 mode (Intel RST AHCI RAID Controller Miniport aka Intel(R) Mobile Express Chipset SATA RAID ...
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1answer
113 views

Setting up a RAID 5 Array

I am currently trying to convert my drives from just a bunch of external disks, each one individually shared from my (CentOS) server into a RAID array (ideally, RAID 5). At current, my drives are: ...
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Intel Rapid Storage Technology RAID Setup always shows on system startup

Is there a way of getting the Press <CTRL - I> screen to not show on startup? Or is it permanently there as long as I have RAID?
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31 views

Raid 5 for more than one failing disk [closed]

RAID 5 works the following: Disk1 | Disk2 | Disk3 A | B | A xor B A xor B is called the parity and it can be on a different disk for different blocks. Now, whenever one disk fails, one can ...
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443 views

How to configure RAID 1 on Intel Rapid Storage, and partitioning design

I would like guidance on setting up a RAID 1 system from BIOS with Intel Rapid Storage. System details: I have Click BIOS II running on a MSI motherboard (Z77A-G43). I also have 2 x 2TB hard drives. ...
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113 views

SAS and SATA together in a RAID

I have to build a new server with SAS drives for RAID 10. However, I have 2TBs of storage on 2x1TB SATA drives. Would it be possible to still plugin 2 SATA drives even if I run a hardware raid 10 ...
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193 views

Hybrid Raid-1 HDD + SSD — Write Intent Bitmap

I am currently running a laptop with 1 HDD and 1SSD. I currently am using mdadm to put some partitions in a raid 1 configuration with --perfer-write set on the HDD. I have this working correctly ...
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836 views

How to replace hard drive in RAID 5 Array and keep data intact?

How would I go about replacing a defective hard drive in a RAID 5 array while keeping the data intact? I have a Highpoint Rocketraid 2720SGL RAID card.
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Protect HDD File access from Live CD

How can we protect our files from copying through another PC or Live CD (Physical Security)? Is it possible to use RAID and secure our data? My os is Linux. Can recover Raid FS from other OS?
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88 views

New Install, Win 8.1 Access over 2 TB

new install, Z87 pro MB, Win 8.1 64 bit, UEFI based. I have 2 TB drives, configured in a RAID 1+0 config, so end result is approx 4TB useable, and windows shows this. The problem is that while I can ...
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607 views

Cheaper alternative to ZFS Storage for a home NAS

I'm looking to build a NAS for home use with 8-10*(2-4TB) drives, out of which 2-3 drives would be used for parity via software RAID. In the past years and up to date, ZFS seems to have become the ...
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Linux raid questions: How to boot if one drive fails?

I am setting up a linux server with two drives in an mdadm created raid 1. All the online help I fine says to create your partitions and then create an md0 raid volume using something like sda1 and ...
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Understanding /proc/mdstat [U_] VS [_U]

My server is set up with raid1. A few nights ago sda fell out completely and data was corrupted. I replaced the drive, cloned the partition table and added the respective arrays. While adding sda3 ...
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37 views

Is there a safe way to move a partition beneath a linux software RAID5 using mdadm?

Suppose, for example, that you have a RAID5 across multiple disks and you would like to retire the oldest of the disks and replace it with something from this decade. I know I can fail the partition ...
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61 views

Is there a way to show RAID details in a similar way to MDADM?

I find mdadm --detail <device> very useful when I need to know what is going on with the device (/proc/mdadm too). Example: /dev/md0: Version : 1.2 Creation Time : Mon Mar 4 ...
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38 views

Afraid to reboot server 2008 R2

I did a fresh install of server 2008 R2, installed the updates, and then rebooted. The system would not reboot. Windows kept checking for ways to repair, I used a linux disc to verify the drives on ...
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1answer
79 views

LVM while mdadm is creating a RAID6

So earlier today I was setting up a new server and creating a RAID6 array with mdadm. I then decided to create a physical and logical volume with LVM while it was running and throw on ext4. So before ...
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64 views

Is it possible to create software Raid array with operating system partition included?

I know that software raid array can be created in the OS it self. But my question is, Is it possible to create a software raid array including partition which is having Operating System installed ? Or ...
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173 views

How Fake raid communicates with Operating system(Linux)?

I am a programmer, I studied about software, hardware and Fake raid's and I am unable to understand how fake raid communicates with operating system (Linux)? I mean which software layer or driver ...
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1answer
316 views

When to change a hdd in a raid/NAS?

When using a Network Attached Storage, when is it the best time to replace HDD (with RAID)? Upon failure, or proactively? I have a Synology DS713+, with two HDD from Western Digital (WD Red, acquired ...
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2answers
230 views

Two SATA 2TB drives in RAID-1 configuration; only one 6.0gb/s port open

Here's the scenario: I am building a computer that will act as a network storage device for local networked users, and a source code repository and backup device for remote users. The machine will ...
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112 views

btrfs does not show drive as missing

I am trying out btrfs and I noticed some funny behaviour: I have two drives in a raid 1 configuration. sudo btrfs fi show Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f Total devices 2 ...
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1answer
120 views

mdadm large memory consumption

Hi i'm build mdadm RAID 6 (8 WD Red 3 Tb) on ubuntu 13.10x64 server with ext4 fs When i download torrent on the array, server RAM is filled for maximum cap (8 Gb) memory is free when i manualy enter ...
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42 views

Make linux spin up all disks at once

I have a server running an 8-disk software RAID. On boot, all disks are spun up simultaneously, which takes about 5 seconds. To save energy, I make them spin down after 15 minutes of inactivity. When ...
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74 views

Two 1 TB Raided Hard Drives or One 2 TB for Webserver [closed]

I am planning to buy a hard disk for my webserver. The System is a DualCore with 1 GB of Ram. I am confused If I should Buy two 1 TB hard disks and Raid it for better performance or just buy one 2 TB ...
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145 views

Linux software RAID 10 on mixed drives - alignment

I have 4 2.5" 7.2k drives lying about and I'd like to build some RAID arrays for a bit of VM storage on my KVM lab box. There are 2x 320GB drives and 2x 500GB drives. I'm looking to create a RAID 10 ...
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195 views

ZFS and FreeNAS: Mirror using half a drive

I'm planning to set up a FreeNAS server with two of my spare drives: 1x 1TB drive 1x 2TB drive Both drives are identical besides their capacity and neither has any data on it. Is it possible to ...
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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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199 views

Expand Intel Rapid Store RAID 5 to RAID 10

Under Windows Server 2011 (Small Business), I have the Intel Rapid Store Technology RAID controller setup for the hard drives. I have 4x 500GB drives, currently using 3 as the RAID 5, and the fourth ...
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267 views

Arch Linux Live CD Fails to boot on Dell PowerEdge

one of my friends is trying to run a Minecraft server off of his old Dell PowerEdge server and wanted to get rid of Windows Server 2003 in favor of Arch Linux. After he burned a CD he was able to get ...
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1answer
404 views

How to install several hard-drives to Tyan S7025 motherboard

First of all, the disclaimer: I do not know much about computers. CONTEXT In February 2010 I purchased a workstation with a Tyan S7025 motherboard. This motherboard has 6 SATA ports (SATA0 to SATA5) ...
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zfs for Linux – formatting disks

I just installed the zfs file system for Linux, but now I do not know how to format a drive with it. I am running Ubuntu 12.04 LTS Desktop and trying to format two external hard disks to mirror each ...
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Any study about RAID arrays with identical/different drive models? [closed]

We often see advice about mixing hard-drive's model or brand for RAID arrays (also works for any disks groups, for example a ZFS pool). The rationale is: drives produced in the same batch tend to have ...
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mdadm --assemble fails when /dev/sd[abcde]1 reordered

I am having trouble assembling a small RAID5 due to a recurring reordering of /dev/sd[a-f] on boot (Debian7). md0 was initially using sd[abc]1, it contains a LUKS device, which in turn contains a ...
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2k views

Converting LVM/EXT4 to ZFS without losing data

I have a home media server with 2 x 3TB drives in it. Its currently set up using mdraid (1), LVM and EXT4. The setup was done using the ncurses Ubuntu Server installer. Goal Convert the setup to use ...
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326 views

Running ZFS as MediaStorage with non ECC-Ram

First to the Setup: I'm planning to use 8-11 USB3 Disks to form a MediaStorage The idea is to use 2 USB3 Hubs to balance the load between two seperate USB3 Ports (on different hubs) Now from what ...
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1answer
744 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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102 views

Migrate RAID 5 from USB

My file server is dead, I think it's the motherboard. I have a RAID 1 and a RAID 5 setup (Windows 8 software RAID) which I would like to migrate to a new Synology DS414. I have an Intel NUC, is it ...