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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Mystery partitions with dynamic disk RAID 1

I have mystery hidden partitions at the beginning and end of the hard drives in my Windows RAID 1 volume and I am trying to find out what their purpose is. Here is the scenario - Before installing ...
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177 views

Trouble with shrinking Synology RAID array

I purchased a new Synology, and copied most of my data over to the new device. The data I've left behind isn't worth professional recovery, but I'd like to have it if possible. There wasn't room on ...
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Re-merging two disk that used to mirror each other

I have had two hard disks that mirrored each other (RAID 1, software based). After I recently plugged them out of the mother board and plugged them back in, this mirrored volume was unavailable. I ...
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58 views

Proliant ML330 G6 rebuild array

When I came to this place, there was a Proliant ML330 G6 server with a P410i controller standing here, which acts as the active directory server, running Windows 2008 R2. I wish the previous admin ...
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40 views

RAID setup - possible to disconnect a drive?

this may be a silly question for some, but I rather ask then to be sorry after losing my data :-] I am just playing with RAID config on my Intel X58 ICH10R chipset mobo with Windows 8.1 and I found ...
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64 views

Take RAID 1 too much CPU performance (Intel Pentium G3220)?

I'm currently building an home server. I'm using an Intel Pentium G3220 CPU. I want to configure RAID 1 for the two 3TB Western Digital WD30EFRX Red HDD in the server. My question is if software RAID ...
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114 views

how to trim the SSD disk of an hybrid Linux soft RAID?

We are considering implementing an Hybrid Linux Raid with SSD+HD by using the "writemostly" flag that supposedly makes the raid write further to the HD than to SSD while maintaining the benefits of ...
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39 views

Moving a RAID 1 between RAID Cards

I have an HP DL380 G6 with the 410i internal controller. I have an array configured with 2 drives as a RAID 1. This logical drive is my boot drive. I've recently installed a P800 raid card and want ...
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172 views

Cannot setup Intel RST

I bought an HP Envy Sleekbook 14 that has a 500 gb hybrid drive (24 gb ssd, ~470 gb hdd). The computer has Intel Rapid Storage Technology support, and it was working when I first booted it up. ...
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48 views

Windows 7, can I mirror directories when I got one HHD? (like RAID) [duplicate]

In Windows 7, lets say I have a "works" directory which containts my work, personal etc information. I want to use a program which always checks the disk and make mirror(s) of this directory. ...
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39 views

Pegasus R6 Thunderbolt raid with CentOS 6.5

We have ourselves a rather expensive Mac Pegasus R6 external thunderbolt raid and a CentOS box that we would love to use it. On a Mac it's plug and play, however on our CentOS box it's not recognized ...
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23 views

Is the software raid provided by windows compatible between windows xp, 7, and 8?

Is the software raid provided by windows compatible between windows xp, 7, and 8? I think some of the newer RAIDs will not be compatible, but will specifically "mirroring" (RAID 1) be compatible ...
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286 views

Simultaneous failure of 8x SSD's in raid 10 [closed]

My friend keeps arguing with me about putting SSD’s in raid vs HDD, I need to settle this. What are the odds of all the SSD’s failing vs HDD”s at once assuming they are from the same assembly line and ...
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98 views

How to know if I have RAID configuration on my machine?

I was wondering if there is any Linux command I can use to check whether I have RAID setup on my machine? I know about cat /proc/mdstat but didn't show me anything meaningful. I just want to know if ...
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326 views

Deleting RAID 1 array with OS on it and switching to AHCI mode? Without losing data?

I am trying to break my RAID 1 array (using onboard intel raid controller) that has Windows 8.1 installed on it. I then want to switch my bios to AHCI mode and boot from one of those drives. Is it as ...
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26 views

raid5 after changing disk, data disappeared in lost+found or?

I lost a drive so I stopped my array, changed the drive, reassembled the array. So far so good except that when I tried to mount the array I had an error about md0 file system (sorry I rebooted so ...
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66 views

mdadm --examine displays something different than --detail

Who should I trust to fill my /etc/mdadm/mdadm.conf ? mdadm --examine --scan returns /dev/md/0 while obviously it's /dev/md0 that is currently rebuilding What should I put in my /etc/mdadm/mdadm.conf ...
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95 views

Functional MD complex RAID10 suddenly marks all drives as spares

This morning during a long ~1.5TB read operation sending data to an NFS client, my md complex-RAID10 array spontaneously stopped, then dropped four members for being "non-fresh" and failed to start ...
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77 views

Intel RAID controller failing to diagnose faulty disk

On my system (running Windows 7 x64) I have an Asus Z87 Deluxe motherboard, with a built-in Intel RAID controller; my config includes a Kingston 240-GB SSD disk for the OS and two Western Digital 4-TB ...
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107 views

Cannot install Windows 8.1 on JBOD raid (AMD 770 chipset)

I am trying to make JBOD raid (yes, I know, that this is not a good idea, but I've decided to stick with it) and install Win8.1 on it. I've successfully created RAID in bios, but Windows 8.1 installer ...
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193 views

Beginner Backing up ZFS Storage Pools

I'm considering moving my personal home data to ZFS on a Debian PC to take advantage of ZFS features such as data integrity and checksums, deduplication, and snapshots. The box has to be more than ...
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Updated CentOS kernel to 2.6.32, system won't boot because mdadm array can't be checked/isn't mounted

Just updated a FreePBX system, kernel is now at 2.6.32. Have two RAID 0 arrays that mdadm arranges in RAID 1. Worked fine up until this update, now I get fsck.ext4: No such file or directory while ...
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678 views

Disk drives not detected by Windows installation but are detected by Bios

I just built myself a new computer and I'm having issues installing Windows 7 Professional (legit copy) on my RAID array I setup. Specs: Gigabyte GA-990FXA-UD3 rev. 4.0 AMD FX-8350 Vishera 4.0GHz ...
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34 views

Migrating RAID 1 to new size drives

We have six 3TB drives in a RAID 1 array on an Ubuntu machine. One of the drives failed (actually the second time this has happened) so I want to replace it, but I am thinking of trying to update all ...
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40 views

my computer hard-locks up with heavily threaded disk access

short of reformatting, I don't know what to do. It passed both C: and D: NTFS disk error checking (chkdisk at boot). I recently transitioned my D: data drive from RAID AHCI (BIOS config, though not ...
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213 views

How to setup Raid0 while having a ssd has main boot

i tried setuping this up. SSD with windows to boot on 2 x 2T Hard Drive When i switched my sata configuration in my bios to Raid to configure the other disks, my main boot ssd stoped working. It ...
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55 views

What are the performance differences between SSD caching and native SSD usage?

I am looking at making some changes to my computer. I currently have a machine running on the X79 chipset and I am using a dedicated RAID controller. The controller is an LSI MegaRAID 9260-8i SAS / ...
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73 views

How do I migrate a single drive (no RAID) running under RAID controller, to AHCI mode without losing the GPT partition on it?

I have a 3 TB drive formatted with the GPT partition style. I use it for data on my Windows 7 PC. I've made the drive accessible via the mount point D: My motherboard's HDD controller mode has been ...
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379 views

TRIM on non-SSD RAID?

A server has been experiencing temporary lockups (1-8 minutes) for some time and I recently found they have been corresponding to VSS snapshots lately. Through event logs I was able to determine that ...
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31 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 ...
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86 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 ...
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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. ...
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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 ...
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27 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 ...
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57 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 ...
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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 ...
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97 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 ...
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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 ...
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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 ...
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295 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 ...
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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" ...
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85 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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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 ...
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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 ...
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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 ...
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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 ...
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54 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 ...
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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 ...
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68 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?
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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 ...