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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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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55 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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264 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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161 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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198 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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114 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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168 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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206 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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235 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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56 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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93 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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253 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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49 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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828 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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228 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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109 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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203 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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143 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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961 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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636 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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872 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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288 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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68 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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218 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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462 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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105 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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734 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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280 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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172 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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474 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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155 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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831 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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Raid Configuration lost After For Installing Windows/Formatting Hard Drive on reboot

My boss recently got a tower fujitsu server, I dont know the model because it is written in Chinese. I installed windows server 2012, activated hyper-v and even installed ubuntu as a VM and ...
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10 views

Creating BIOS Raid on the Asus Z87M-Plus

I am trying to setup a BIOS RAID with 4 WD RED 2.0TB. SATA Mode is set to RAID Mode in the BIOS. During Boot I hit Ctrl+I to get to the RAID tool. Now comes the part whee I get stuck. I select ...
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14 views

PCI-Express RAID Controllers with TRIM Support

I've an AMD Athlon computer with Windows 7 and I'd like to set up an SSD Raid 0. Are there any PCIe RAID controllers with TRIM support available on the market? The only thing in this are that I've ...
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10 views

Multi-distro LINUX from grub2. LVM Vgs not detected

Having a very weird problem with LVM in linux earlyspace. My system runs with 4hdds. Three are sata and one is eide/pata (/dev/sdd). I'm using grub2 to manage several OS's (two debian, one ...
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27 views

Why does my dynamic disk say it is not formatted after a power loss?

I have a Windows Dynamic disk of three 3 Terabyte drives in a single spanned volume. Today I experienced a power loss and didn't get to turn my computer off before my UPS died (I guess I shouldn't be ...
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33 views

Recover RAID 5 with 2/4 failed drives

This Sunday one of my personal RAIDs disks failed. Stupidly, I thought, whatever, that's what I have a RAID for, I'll get a new one to replace it tomorrow. Barely two hours later it starts beeping ...
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13 views

Power Supply vendors/part numbers for Promise NS4300N?

Good morning all! My problem is relatively simple: I have 2 Promise NS4300Ns, both have dead power supplies. Disassembling a 3rd yielded a Mini-ITX format power supply with a proprietary power cable. ...
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20 views

3 small disk RAID5 -> 4 large disk RAID6 upgrade. Add drive or replace drives first?

I'm going to upgrade my Synology NAS from 3*1TB/RAID5 to 4*3TB/RAID6. Which is the better approach (and why): a) Add 1 new 3TB disk, and convert the group to RAID 6, then swap the remaining drives ...
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RAID Controller Compatibility for P67

I have a RAID 0 array created using a Sabretooth P67 motherboard's on board RAID controller. This uses the intel P67 chipset to create the RAID. The motherboard has died but (so far as I know) the ...
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24 views

Recover RAID 0 Array after motherboard failure

I have a RAID 0 hardware RAID array (using the motherboards RAID controller) on two SSD hard drives (C) and a third drive (D) in a non-RAID configuration. I have a new computer already ordered and ...
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22 views

Ideal Setup for vSphere Hypervisor

I just picked up a Dell R720 for my company, it's got plenty of resources where I feel I can run multiple VM's at the same time. Here are the specs. Intel Xeon E5-2620 (2) 8GB DIMM (8) 146GB SAS ...
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15 views

Moving software RAID to Linux

I'm using a RAID 1 (mirrored pair) configuration in my Media Center/ NAS system. Currently it's running Windows 8 (yeah, big mistake I know) and I'm regretting it (did it for the games, not worth it). ...
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33 views

Add Mirror for volumes other than the last one in Windows 7 (disk “not up-to-date”)

I'm using Windows 7 x64 Ultimate. I have an existing 4TB disk with 3 NTFS volumes, a new 3TB blank disk, and I'm trying to mirror the volumes onto the new disk. My Windows install is on an SSD which ...
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Broke my RAID. hp dv4-5100 with 500GB HDD and 32GB SSD

I was having trouble installing Ubuntu, presumably cuz Ubuntu got confused with the RAID configuration of the HDD and SDD. So i found a thread that explained the issue a little, but skipped some ...
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82 views

poor write performance with RAID 5 array

I have an Intel RS2WC080 RAID controller card connected to an array of 8 WD Black 4TB SATA3 drives, in a RAID5 configuration. While the read speed is ~750MB/s the write speed hovers around 45MB/s. I ...