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.

learn more… | top users | synonyms

1
vote
0answers
54 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 : ...
1
vote
0answers
234 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 ...
1
vote
0answers
149 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 ...
1
vote
0answers
176 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 ...
1
vote
0answers
111 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 ...
1
vote
0answers
1k 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 ...
1
vote
0answers
153 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 ...
1
vote
0answers
191 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 ...
1
vote
0answers
221 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 ...
1
vote
0answers
54 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. ...
1
vote
0answers
92 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 ...
1
vote
0answers
54 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 ...
1
vote
0answers
248 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 ...
1
vote
0answers
47 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: ...
1
vote
0answers
733 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 ...
1
vote
0answers
216 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, ...
1
vote
0answers
105 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 ...
1
vote
0answers
202 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 ...
1
vote
0answers
138 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 ...
1
vote
0answers
916 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 ...
1
vote
0answers
598 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 ...
1
vote
0answers
1k 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 ...
1
vote
0answers
832 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 /): ...
1
vote
0answers
274 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 ...
1
vote
0answers
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 ...
1
vote
0answers
209 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 ...
1
vote
0answers
444 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 ...
1
vote
0answers
98 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 ...
1
vote
0answers
725 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 ...
1
vote
0answers
267 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 ...
1
vote
0answers
164 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 ...
1
vote
0answers
459 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 ...
1
vote
0answers
153 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 ...
1
vote
0answers
808 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 ...
0
votes
0answers
10 views

Hooking up Raid0 drives to Dell XPS

I recently dug up a pare of WD Raptor 74GB hard drives that I had once upon a time in an older custom built computer they were RAID0. I now have a Dell Studio XPS 8000 desktop that I'd like to see ...
0
votes
0answers
15 views

Invalid system disk message, but no data loss

I built my own computer a about 7 months ago and everything was fine until I was playing game and it blue screened. After it blue screened and I restarted my computer I got a message, "Invalid system ...
0
votes
0answers
7 views

Secure copy one folder to multiple destinations in OS X

Sorry for asking what looks like a question that's been asked a few times. I'm very far from being a super user, which makes it very difficult for me to be able to expand on a relatively complex ...
0
votes
0answers
8 views

Installing CentOS 6 on Asus M3N78-EM using CentOS software raid / LVM

I have an Asus M3N78-EM motherboard with 3 WD 250GB drives connected to SATA ports 1-3. The BIOS currently is setup to see the drives as AHCI instead of raid due to the controller driver not being ...
0
votes
0answers
27 views

Dynamic/Static striping across BTRFS raid groups

I'm looking to set up a new storage server and would like to use BTRFS to protect against bit rot. Ideally, I would like a setup as a theoretical (btrfs) raid6 (both data and metadata) for every group ...
0
votes
0answers
20 views

Is it possible to convert a btrfs RAID5 to a RAID6 with the same disks without losing data?

How would I convert an existing RAID5 (single parity) btrfs setup to a dual parity RAID6 configuration given enough free available disk space, using the same disks, without swapping out data ? ...
0
votes
0answers
21 views

mdraid 512/4096 sector confusion

I created a new mdraid array on 3TB disks, connected via USB (because the internal SATA ports were used for the old array). $ fdisk -l /dev/sdb Note: sector size is 4096 (not 512) Disk /dev/sdb: ...
0
votes
0answers
13 views

Attach SSD next to the RAID

I have an IBMX3200M3 with a 4 HDD in RAID1 and now I trying to attach an extra SSD just to a SATA port on motherboard... After system fails to boot up from the RAID and anything and i finish up to ...
0
votes
0answers
9 views

mdadm on Debian 7 forgetting about a disk

I have a degraded RAID1 array running on Debian 7. I am trying to add another disk to the degraded array, but mdadm forgets the existence of the other disk at reboot. The array devices are /dev/sda1 ...
0
votes
0answers
14 views

debian boot procedure stops while starting RAID5 array

imagine the following situation: debian wheezy 7.4 on arm system created a RAID5 with 3 disks /dev/md0 created ext4 file system wrote entry to mdadm.conf via "mdadm --detail --scan >> ...
0
votes
0answers
17 views

Win 8.1 new installation - existing raid mirrors failed to load

I have just installed windows 8.1 on my tower PC, from previously having Win 7. This was a fresh installation with the OS partition formatted prior to installing Win 8.1. My spec is: X58A-UD3R mobo ...
0
votes
0answers
61 views

Linux RAID Re-Shape Stopped, unmountable

I added another drive to my RAID 5 and migrated it to a RAID 6. Everything went fine, but now the process seems to be stuck at 63.2% and md2_raid6 takes 99.9 of the CPU. RAID Details: /dev/md/2: ...
0
votes
0answers
9 views

How to find how many HDDs are present in a NAS?

I'm logged into the web interface of a NAS made by LG Electronics. It is obviously running some Linux version : Linux LG-NAS-N1T1 2.6.30-nt1 #130 Sun Nov 28 15/31/54 KST 2010 armv5tel GNU/Linux ...
0
votes
0answers
24 views

Configuring RAID on Intel DX58SO CTRL+I does not enter RAID Config Utility

I have two 3TB HDD plugged into SATA 0 and SATA 1. I configured the drives for RAID in the BIOS and now when I boot I see the RAID config screen. The screen lists all my drives as it should and says ...
0
votes
0answers
22 views

Changing default cache policy online on LSI Megaraid

I am having a RAID 10 with 6 Harddiscs in my server. I had set the default cache policy to write through. After setting up the OS, i came to know the I/O rates are too slow. I read in some forums that ...
0
votes
0answers
10 views

Windows Server RAID 1 Rebuild

I had software RAID 1 and both the drives in the server are faulty.The server was booted from secondary plex. So I removed the mirror of one faulty drive and asked the data center for a drive ...