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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CentOS Gnome only showing 1TB on 6TB Server?

I just bought a new server and want to use it to store files, It has 2x 3TB hard drives. I Set them up in raid 0 as i don't need any redundancy. I don't know much about servers and command-lines ive ...
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133 views

Dell Precision T3500 Intel Rapid Storange Technology shows no Acceleration option?

I have a Dell Precision T3500 with a 2TB HDD with my OS installed and a brand new 128GB SSD which is not formatted. The SATA mode is set to RAID in BIOS and the latest version of the Intel Rapid ...
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57 views

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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94 views

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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16 views

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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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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55 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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120 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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86 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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36 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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652 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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1answer
46 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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91 views

Why is windows server 2008 resyncing new raid 5 array?

I have setup a software raid 5 in windows server 2008 standard, immediatly after creating it now says resyncing. What is it resyncing when there is no data on the volume? Is it safe to write data to ...
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1answer
47 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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759 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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19 views

How to set up parity for spanned volumes

I am looking for a way to make parity backups of my data that i store on a large spaned volume... Ideally i would use raid 5, but i have drives of many different sizes, and would like to use all. What ...
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40 views

Skip initial resync on a new Windows software RAID 5 build?

I just added 8x4TB and created a software RAID5 volume. Server 2008R2. Based on progress so far, it's going to take 8 days to complete the resync. I'm not a busy man, but that's asking a lot. ...
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77 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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14 views

Ubuntu boot through failed RAID

I have a large media partition as a separate RAID5 on my Ubuntu server. The server is not easily accessible, so I need it to continue the boot process in all but the most dire circumstances. Right ...
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607 views

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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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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232 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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44 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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126 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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190 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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47 views

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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61 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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13 views

Power on/off MD-Raid disks on command

I recently set up a mdadm ext4 RAID 1 array for storing my pictures. I don't need to access them very frequently (maybe once ever week or two), so I was looking to poweroff my drives when I'm not ...
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47 views

How do I accelerate more than one hard drive using Intel Rapid Storage Technology

I have a Biostar T77B, a 3570K, a Seagate 3TB 7200 RPM HDD, and an OCZ Agility 3 60GB SSD as the core of my system. I just bought a second Seagate 3TB 7200 RPM drive and a Kensington SSDNow V300 60GB ...
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361 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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54 views

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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512 views

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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29 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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44 views

F17 dracut boot fail error, RAID array involved

I have problem booting up my colleague's desktop machine. The problem is that, on boot the machine throwing the following error. dracut Warning: Unable to process initqueue dracut Warning: ...
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30 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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35 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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52 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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41 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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1answer
72 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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100 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
121 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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162 views

How do I update the firmware on an LSI 9650SE-8lpml (Ubuntu)

I have heard that I can put my 3tb and 4tb drives to use in raid with my LSI card if I update the firmware. So I went to the LSI site and downloaded the newer firmware...but how do I update it? I ...
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80 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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49 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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31 views

Microsoft 2008R2 - Break Mirrored Volume

My question is, has someone test to migrate storage using the Microsoft RAID 1, using Break Mirrored Volume function? I did some test, sometimes all works ok and driveletter always inherit the new ...
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38 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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54 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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1answer
109 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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131 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 ...