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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Do I need a UPS with a RAID-configured NAS

In order to keep my home file archive safe, I've bought a Synology NAS and configured it to use a Synology Hybrid RAID configuration. Now almost a year since I started feeling safe about the years of ...
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320 views

How do PCI express RAID cards work?

I was recently playing with Xen server which supports hardware RAID only and as I always used Linux MD's only so far, I have no knowledge of hardware RAID at all. I was looking for some cheap hardware ...
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515 views

Two SATA-3 vs four SATA-2 SSD drives in RAID 0 [closed]

I have a relatively old motherboard (msi BIG BANG-XPOWER) that has 8 SATA ports, 6 of which are SATA-2 and 2 of which are SATA-3 and I'm thinking of creating a RAID-0 array of two or four SSD drives. ...
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35 views

Reading a single disk from RAID1 set (Intel Matrix)

I have an Intel RAID (ICHxR), where a RAID1 set has a failed disk. The problem is that the RAID volume is inaccessible, even though there's one healthy drive still in it. I tried removing the failed ...
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88 views

Windows restore saying partition is too small. It isn't

I built a media PC years ago with three 750 GB drives in a Raid-5 configuration. This allowed for 1.5 TB of space and had redundancy. At the time I didn't know how bad performance was with RAID. I ...
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885 views

Btrfs: RAID 1 on 3+ devices

I currently have a Btrfs partition with four devices: three 3 TB drives and a 4 TB drive. Data and metadata are RAID 10, so I have 6 TB of usable space, which is almost full. I'd anticipated that RAID ...
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94 views

Speed up ubuntu on desktop by moving some directories to a faster storage

I want to speed up my ubuntu install a bit. I was using a RAID1 setup for the whole system (separate md for /home and /). Now (thanks to ...
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69 views

Hp ML310e gen8 + P222 + debian / ubuntu

Is possible to run this configuration 2 disk raid 1 on b120i integrated controller for linux debian or ubuntu system, and 4 disk raid 1+0 on P222 controller for data storage on Hp ML310e gen8 ...
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153 views

Hard disk error in Intel Matrix Storage Manager

I have two hard disks, both 160GB, and with Intel Matrix Raid on these two disks, I created two volumes Volumne0 Raid1 Volumne1 Raid0 Now, one of the hard disk shows error in the Intel Matrix Raid ...
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136 views

How would hardware RAID compare to Windows software RAID?

I recently bought a new PC with a Gigabyte Z97P-D3 motherboard. One of the things it supports that my old machine didn't is RAID so I had planned to transfer my 2x 1TB hard drives from my old machine ...
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733 views

How to create a Mirrored Volume in Windows 8.1 - mirror option missing

I am trying to create a mirrored volume (RAID-1) in Windows 8.1 (standard edition, not Pro). This is a new Windows 8.1 installation. I have two 500GB drives attached to SATA ports, neither of which ...
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25 views

activate a raid1 array with a single spare disk

in a linux raid1 with 2 disks, one disk (sdb) died. i replaced the disk and rebuilt the array. during the recovery also sda begins to give i/o error. the recovery reach 100% but the raid status is ...
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225 views

Does Intel H97 support RAID5 and RAID1 at the same time?

Can anyone tell me if modern mainboards with the Intel H97 chipset that claim to support RAID0, RAID1, RAID5 and RAID10 also support RAID1 and RAID5 at the same time given 6 SATA HDDs? What I want to ...
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211 views

Windows 8.1 stuck at startup after deleting the OEM partition (Intel Rapid Storage technology crash)

I have a Lenovo U410 laptop which have a 1TB hdd and a 32gb ssd. The ssd is used for speeding up the startup time with Intel Rapid Storage Technology. The partition table for the SSD looked something ...
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324 views

Converting Boot drive from RAID0 to RAID1

I bought a HTPC I plan on using as a NAS/HTPC combo, which has been working well for me for a while now. When I bought the machine from Dell, it came with 2 500GB HDDs in a RAID0 configuration as ...
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166 views

Firmware RAID drive assignment suddenly missing - How to add it back?

I have an ASUS Sabretooth 990fx R2.0 motherboard, and I have three HDD's in total. 2 x 250GB Samsung EVO SSD drives and a single WD 1TB HDD. I had set up my 2 SSD drives in RAID-1 configuration ...
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92 views

mdadm grow from RAID1 to RAID10

I've seen this post about how to convert from RAID1 to RAID10, but reading the mdadm manpage seems to me recent mdadm allows for reshape from RAID1 to RAID10 by going through a reshape from RAID1 to ...
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76 views

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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244 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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65 views

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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77 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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46 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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75 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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167 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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46 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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307 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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52 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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57 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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422 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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167 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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452 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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29 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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88 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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125 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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103 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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128 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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299 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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1k 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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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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44 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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246 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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85 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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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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569 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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35 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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101 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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21 views

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 ...