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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SATA-II SSD Raid 0 slow on Windows-7

I have 2 SSDs and made a RAID 0 with the on-board controller of my mainboard. But i only get 130 megabyte/second average read/write speed which seems to be pretty slow for me even for SATA 2 which ...
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196 views

Create a mdadm raid mirror of an existing lvm

Hello I'm trying to figure out how I can create a pretty strange mdadm mirror of my lvm. I have 4 disks, (sda,b,c,d). Each disk has 2 partitions: 1Gb - physical volume 500mb - Swap My system lvm ...
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44 views

erased md0, md1 and can't recreate them

I previously had a working RAID 1 array. I think as a result of running grub-install /dev/sdb and grub-install /dev/sdc I somehow wiped my computer of md0 and md1. I need to set them up again. When ...
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41 views

Progressive upgrade of a RAID array

Our group has a 16 disk backup RAID6 array. Currently, those 16 disks have the following specs; 500 GB 16 and 64MB cache 3 Gb/s SATA I would like to begin upgrading these disks if possible, ...
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105 views

How to add extra sata drives to desktop server

I have an ubuntu 12.04 machine with a raid using mdadm. The motherboard has 8 sata ports which are all being used, and I would like to add more hard drives to it. What's the easiest/best way to add a ...
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325 views

blkid not returning the correct UUID/label for drive

I have 7 drives in my server (running Debian Wheezy as dom0 for a Xen hypervisor): An 80GB system drive, 3 x 2TB drives, a 1TB drive and 2x 500GB drives. The 2TB drives are all part of an mdadm RAID ...
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134 views

Linux kernel 3.9 new storage features howto?

Linux kernel 3.9 has been released, which brings new features for storage cache devices (dm-cache), as well as BTRFS RAID 5/6. These features are undoubtedly sexy, but are all but completely ...
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59 views

Software RAID failed to mount after apt-get upgrade

I have a software RAID 10 (jfs) on an ubuntu 12.10 and require some assistance repairing the RAID after it failed to mount after a routine apt-get upgrade followed by a reboot. /dev/md0: Version : ...
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316 views

Broken mdadm RAID after hard drive firmware update

I updated the firmware on the two hard drives in my raid array, and now the raid array does not seem to work. I'm running Kubuntu 12.10. Here is the output of some things I tried: sudo mdadm ...
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190 views

Troubleshooting XFS performance (number of cylinders reported by

I have two servers with identical hardware, both running CentOS 5.8. They both have 40 TB external RAID arrays attached (via eSATA) to LSI MegaRAID SAS 9280 cards. The array has a GUID partition ...
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217 views

Intel Matrix Storage controller black screen after reformatting the disk

I have a Dell T3400 PC with an Intel Matrix Storage controller and two disks which were in a RAID-1 configuration. I took out one of the disks and installed Linux on the other disk, breaking the RAID ...
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126 views

Raid 0 (OS) + SSD Cache, what are performances like compared to pure SSD (OS)

I'm considering a RAID 0 setup with an SSD cache drive. Will I see a noticeable difference in speed with the SSD cache drive, will this even work? No I will not install the OS on the SSD. I'd prefer ...
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2k views

Trouble Mounting (Intel) RAID in Debian

I am switching to Debian from Ubuntu and so far all is good, however, I can't get Debian to read one RIAD drives. I have three physical drives setup, using Intel Matrix Manager, for a RAID5 volume ...
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186 views

RAID-0 bottlenecking when reading and writing simultaneously?

I have 4 Samsung 840 Pro SSDs running in hardware RAID on an Intel RS2BL080 LSI RAID card. My read and write times are incredible: $ dd bs=1M count=10000 if=/dev/zero of=test.img conv=fdatasync ...
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230 views

TRIM support on Intel RS2BL080 Hardware RAID card?

I've got an Intel RS2BL080 hardware RAID card and I'd like to know if it supports TRIM on my RAID-0 array of SSDs. I've heard that the Intel 7 series integrated RAID solutions that ship with ...
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274 views

Asus Sabertooth 990FX RAID - Drives disappear

Just got a 990fx 2.0. I'd like to setup two Seagate 1TB drives in a RAID 1 config and same thing: Detected under AHCI but as soon as the SATA ports are config'd to RAID, they aren't detected. I don't ...
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57 views

Test my RAID 0 with a cache ssd attached using checksums?

I was hoping to use a ram drive to store a randomly generated file that is written to the raid 0 array, and then read, and checksum is verified against what's on the ram drive. Lather, rinse, repeat. ...
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97 views

Problems with Fujitsu SAS hard drive on Intel server

I have a Intel S5000VSA server with two Fujitsu 250 GB SAS hard drives. My Windows installation was damaged and I couldn't boot my server with Live Windows. Now I want boot them with RAID card on my ...
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56 views

Software RAID 1 resync's on SATA cable switch?

I made a mistake when I opened up my desktop removed a 2 disk RAID 1 and reconnected them, but with the SATA cables switched, such that sda became sdb and viceversa. On boot, the RAID array started ...
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262 views

Intel DX79SI won't work with RAID-1

I built a brand new system, that has an Intel DX79SI mainboard, 16 GB DDR3 (four fours), nvidia geforce gtx 470 (from older system), coolermaster 700w psu from older system, intel core i7 3820, latest ...
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51 views

Why does it say that Raid 10 recovery is not supported?

I have a QNAP with a 8X2TB Raid 5, that I am going to replace to a 6X2TB Raid 10 + 2 hot spares RTFM on my hardware, I noticed something, which I don't understand, and hoped someone can enlighten me: ...
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891 views

grub refuses to install to raid array

I have a software raid 0 setup with dual booting Windows 7 and Ubuntu 12.04. The GRUB bootloader that is already on the hard drive seems to work fine. However, since the latest package update for ...
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242 views

Windows XP 64-bit hangs

I have a Windows XP x64 box showing a couple of odd behaviors. First, the system is hanging after it has been up for about ten minutes. All applications stop responding, Ctrl + Alt + Del does nothing, ...
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114 views

windows 7 fails to install to raid 0

I recently purchased 2 120gb ocz ssd's and my goal is to install windows 7 64 bit to them in a raid 0 array. What I've ended up with is 2 computers torn apart, my tv disabled, a bleeding thumb and no ...
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208 views

Why wont my computer boot from the logical raid volume while installing Windows 7

I have new computer I built the motherboard is an ASUS Sabertooth 990FX. The motherboard has UEFI instead of normal BIOS. The problem I have is when I try to install Windows 7 with my motherboards ...
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151 views

How to boot from an IDE Drive on a new Mobo

I currently have a desktop with a mobo that has no IDE slots and i'm trying to boot from an old IDE 32Gb HDD. So i bought myself a PCI Express card that allows the interface and i was able to access ...
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1k views

CentOS - Add additional hard drive raid arrays on Dell Perc 5/i card

We have a Dell Poweredge 2900 system with Dell Perc 5/i card and 4 SAS hard drives attached, with NTFS partitions on them. We installed CentOS on one raid array on this controller with a different ...
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662 views

Ubuntu raid configuration lost after reboot

I have a JMicron raid controller on the motherboard, and I have a menu in which I can set RAID arrays when the system boots. I've set it to RAID-1 and added my two identical 2TB disks (the OS disk is ...
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2k views

Computer Slows to crawl after Event Id 3, some issue with Raid Port 0

Recently my computer randomly hangs, crashes and slows down at night, when I click on something when I wake up the computer just doesn't respond and shows the loading thing for my cursor. Today, I ...
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951 views

mdadm: hot remove failed

My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /): ...
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307 views

How is WHS 2011 handling backups of a mirrored drive (RAID-1)?

I have Windows Home Server 2011 automatically backing up my PC. The relevant specifications are that my 500GB system drive is a software mirror and my PC is running Windows 7 Ultimate SP1. I expected ...
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70 views

Maintaining peak IO potential with DD / CP

I wanted to copy a file (40 gig dataset) from a single drive to a dual disk raid-0 drive. I tried with CP and it sustained read - 4mb and write - 11 mb (doesn't make sense I know (must be the stripe ...
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235 views

What caused my RAID 5 array to become corrupt?

My machine has an Intel ICH9R RAID controller built in to the motherboard and an additional SIL3124 controller. I had two 1Tb hard disks in a RAID0 array on the Intel controller and 3 1Tb disks in a ...
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482 views

hdparm: 500, 200 and 20MB/s as results, within seconds?

No, nothing is running on the server. [root@~]# hdparm -t /dev/sdb /dev/sdb: Timing buffered disk reads: 1672 MB in 3.00 seconds = 557.18 MB/sec [root@~]# hdparm -t /dev/sdb /dev/sdb: Timing ...
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107 views

Rosewill RAID Enclosure - Adding a Second Card

I have a couple of Rosewill RSV-S5 RAID enclosures. Each one comes with a PCI express card to act as the RAID host. However, on my host system (Slackware 13.1.0 running Linux 2.6.33.4) I'm just ...
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751 views

Windows 7 Will not boot from SSD when other Controller has raid enabled

I have recently put together a new high-end gaming / work PC. The relevant hardware items for this problem are as follows: 1 x ASUS Maximus IV Extreme-Z Intel Motherboard 2 x Western Digital Caviar ...
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296 views

RAID 5 volume fail with only one bad disk

My motherboard is an MSI Big bang xpower with a RAID 5 running Windows 7. The ICH10R on the motherboard controls the RAID. Recently a power interruption occurred and the RAID was not able to ...
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187 views

Will Thermaltake Muse R-Duo Raid reset lose data?

I have a Thermaltake Muse R-Duo Raid chassis with two drives installed and DIP switches set to Raid-1. However, only the left lights are lighting up and I have data on the drive. I'm guessing it is ...
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544 views

Software raid-1 on external drives: Switch from USB to eSATA possible?

I guess how the drives are connected has nothing to do with raid or no-raid but to be sure I'd like to ask this short question. I just created raid-1 on my 2x2 external USB-connected drives and now ...
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493 views

proper procedure to repair RAID 1 volume in Windows Server 2008 R2

I'ave a windows server r2 with the following configuration 500mb SATA for OS 2 x 1TB SATA in Software Raid 1 (done through the operating system) One of the 1TB drives are bad. What will happen ...
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159 views

Compatibility Problem ? Intel DP43TF with Promise Fastrek TX4650

When I installed a Promise Fastrek TX4650 PCI-E RAID card to Intel DP43TF, the RAID card does not function (totally). But when I put the same RAID card to another motherboard, the RAID card works as ...
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862 views

Using mixed disks and OpenFiler to create RAID storage

I need to improve my home storage to add some resilience. I currently have four disks, as follows: D0: 500Gb (System, Boot) D1: 1Tb D2: 500Gb D3: 250Gb There's a mix of partitions on there, so ...
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14 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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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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15 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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9 views

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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21 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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24 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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68 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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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 ...