RAID - Redundant Array of Independent Disks. A Storage technology to provide redundancy and performance, to reduce I/O bottlenecks involved in using multiple disks for large storage.

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Can I mount a microsoft mirrored dynamic disk?

I'm testing out sw raid in windows 7, but I almost always use linux and I would like to know if it's possible to mount such a mirrored dynamic disk. I can already mount each members separatly but ...
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92 views

Two arrays have slightly different array size with same size disks/partitions, why?

I created a software RAID 5 array one year ago using mdadm v3.2.x which shipped from CentOS 6.3, after few months, I moved/assembled the array to/in Fedora 19 (now Fedora 20). It had three 3TB disks ...
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1answer
301 views

Proxmox Master Node crashes

I've inadvertently discovered a Proxmox bug. I run a personal cluster of 4 nodes (a technology lab for giggles and gags). Each node has a Dell Perc 5i and 4 HDDs in RAID 10. The standard Proxmox ...
3
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1answer
405 views

cleaning /dev/md0 filesystem ( raid)

I have a CentOS server using raid. The /proc/partitions contains: major minor #blocks name 8 0 976762584 sda 8 1 104391 sda1 8 2 921600855 sda2 8 3 55054755 ...
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1answer
89 views

Problem with former RAID hard drive settings in Linux Mint 17

I'm new to Linux, just installed Linux Mint for the first time. I have two hard drives which were previously in a RAID configuration. Now before I have installed Linux I've changed them to individual ...
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1answer
278 views

RAID configuration disappears after reboot

I am using SUSE to install Hana in my system. I have 2 298 GB HDDs which I am going to configure as RAID 0. I am using mdadm to create a RAID array. I use the below command to create the RAID array. ...
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1answer
200 views

How to rebuild a two drive raid 1 array on Linux?

I need to rebuild a two drive (160x2) raid 1 (mirror) array. It was an Intel raid from a 7 year old Dell computer (Windows). Both drives are assumed to be functioning. The raid was created with an ...
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1answer
21 views

software raid priority (systemtap)

I'd like to know on which priority software raid works (level 1 if it matters). So I wrote simple systemtap script to do the job, but I'm not sure if I have done it correctly. [root@asus-ux21e ~]# ...
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1answer
325 views

Terrible performance on linux mint 16

I am having difficulty with getting linux mint to cooperate with my desktop. Specs: Mobo: Maximux IV Extreme-z CPU: i7 2600k GPU: 2x R9 290x Storage: (240GB) 2x OCZ Vertex 3 on RAID0 (Currently ...
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1answer
215 views

Fdisk cannot read size of this disk is 4.0 TB under RAID-0 enviroment

I have server from OVH data center , I have Two SATA Hard Disk Drive , each Disk Size 2.0 T.B , I have RAID controller card but I convert the RAID-1 to RAID-0 through OVH Rescue mode and here is the ...
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1answer
33 views

How can I track virtual Disk device to physical slot?

I'm kind of new working with Unix (Ubuntu). I managed to install Ubuntu on RAID1 and mounted 3 RAID 0 drives. I have a 9271-8i storage controller: RAID1 (sda) - Unix installed RAID0 (sdb) RAID0 (sdc) ...
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0answers
31 views

automatic disconnection of RAID array

A RAID array connected to my system (Debian 7) via USB frequently disconnects itself for no apparent reason. Upon initial connection to the system, the device is detected, and the array can be ...
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0answers
2k views

Problem Installing UBUNTU 14.04 (AND Mint 16, which is based on UBUNTU 13.10) as dual boot on RAID 0 with Windows 8.1

Ok, I know that there is Dual-Boot Ubuntu 14.04 and Windows 7 on FakeRAID Installation error - question marks "????..." and that that post has some answers for me, but I don't know if it ...
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0answers
25 views

RAID6 scrubbing mismatch repair?

You can initiate a scrub of a mdadm array with echo 'check' > /sys/block/mdX/md/sync_action, and if a bad sector is found, it'll rewrite it automatically (from a mirror or from parity information ...
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0answers
170 views

What happens if I delete dmraid?

I am new to Linux and am trying to install Ubuntu 12.04.3 LTS from a live-USB and have it run alongside my Windows 7 installation. On the installation screen for Ubuntu, at the partition page, I get ...
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0answers
11 views

How to increase an FS using a LiveCD - that has SW RAID+LVM

If we have an older OS and can only increase the FS if we umount the FS because it is the ex.: /usr - then we have to use a LiveCD. The /usr is in the rootvg (LVM) that is on a SW raid Q: What are ...
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0answers
499 views

What steps can I use to recover a RAID 1 array with LVM and EXT3 on it?

Someone handed me a drive that used to be part of a RAID 1 (mirror) array. The drive apparently has LVM (1?) on it and EXT3 (I believe). What steps can I take to regain access to this drive? ...
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0answers
326 views

Disable RAID auto detect at runtime

In Linux, I'm partitioning two disks for RAID1 with fdisk. The first disk partitioning succedes, but the second fail because the raid starts automatically and occupy also the second disk (why? it ...
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0answers
533 views

Bad superblock after server crash

My server (CentOS 6) crashed, and it now kernel panics on boot. It's currently using a mdadm RAID1 array with two 1TB drives. vg_server2422-LogVol01 is / vg_server2422-LogVol00 is Swap ...
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0answers
295 views

Media server RAID difficulties (on FreeNAS)

Disclaimer: I've never used FreeNAS or any type of RAID before, so this is a first. I've decided to build a media server in my new apartment. I'm going to be going with a total 10TB of space (6x2TB ...
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0answers
288 views

Software raid checksumming slow

On my new 24 disk array I get 900 MB/s of raw read or write using dd to all the disks. When I set the disks up as a 24 disk RAID6 I get 400 MB/s write and 600 MB/s read. It seems to be due to ...
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0answers
667 views

Linux Mint installer does not see fakeraid drive

I have a computer with a fakeraid 0 array (the computer came with it, and I don't want to remove my other OS to get rid of it), and I am trying to install Linux Mint. When I first boot up from the ...
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19 views

Is it reliable to assemble md from two machines at the same time

Say we have the same disks accessible from two machines. I want to do assembling md from two machines. Is it possible/reliable ? The disks are connected through SAS. All I need to have is reliable ...
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27 views

Converting RAID partitions to LVM

I have a 3TB HDD. of type RAID 5. I want to convert it to LVM. How can I do this without data loss and without needing for installing the OS again? $ df -h Filesystem Size Used Avail Use% ...
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96 views

mdadm raid 5 missing partitions after reboot

I had a working raid 5 array that had a whole debian install on it (I set it up during a debian install). I'd been using it a couple of days, all was fine, but since I created it during debian ...
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16 views

Linux software raid assembled “itself” with failed drive. Why?

I have two raid1 arrays: md3 (sda3 + sdb3) and md5 (sda5 + sdb5). I deliberately failed the sdb disks because I wanted to change the partition table: # mdadm /dev/md3 --fail /dev/sdb3 # mdadm ...
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0answers
121 views

Linux / Windows 8.1 : Installation on raid0

I need to install a linux distribution on my laptop (an Asus UX302LA). I tried again and again but I couldn't even begin the installation. To explain you my problem, I know that Windows 8 is installed ...
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24 views

How is default readahead value determined

I have two different devices running XFS and the default readahead value set differs between the two disks. Why is that ? How is the default size computed ? Is it device dependent ? I might also add ...
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0answers
72 views

error running raidctl on Solaris 10

I am trying set up a disk mirror on a Solaris 10 system. The two disks are identically formatted and not mounted. Neither is a boot disk. I ran the following: # raidctl -c c1t2d0 c1t3d0 ...
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24 views

Change 4 mirrored HDDs to RAID 10

My boss has a large computer (12-core, 4 HDD computer that we use for scientific computing) and he has all of the HDDs mirrored. Is it possible to change this to RAID 10 without data loss and without ...
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0answers
581 views

Install Kali Linux on RAID0 (as dual boot Windows 7 & Kali)

I’m currently trying to install Kali Linux on my laptop as described here. The problem is I’ve a laptop (MSI GT70) with a Raid 0 (2x 500Gb) and Windows 7 installed on it. At the point where I’ve to ...
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0answers
485 views

Installing 12.04LTS Server on a Fake RAID10

Scenario Install Ubuntu 12.04LTS Server on a RAID10 with boot on a RAID1. 4 - 2Tb SATA Hard Drives 3 Partitions (/boot, /, and swap) boot (256Mb from each disk) setup in RAID1 /dev/md0 partition ...
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0answers
172 views

What chunk size for KVM under Debian linux is optimal with RAID 5?

I would like to know, how to set optimal chunk size for my debian squeeze in future. I Work with 3x WD RE4 500Gb 7200RPM in SW-RAID 5, under debian squeeze. (in the future maybe under wheezy) I Saw ...
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0answers
197 views

Dual/Triple Booting with dmraid and non-raid disk

I currently have 3 hard drives in my computer The first two disks are in a RAID-1 array, using an Intel P55 chipset, and accessed through dmraid, with the third drive partitioned like so: Filesystem ...
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0answers
443 views

Intel Z68 chipset raid5 disappeared

I have this motherboard, it's a gigabyte Intel Z68 chipset. I used the Intel chipset configuration (between BIOS and OS) to configure a 3 disk Raid5 array which I formatted as NTFS (Linux already has ...
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0answers
236 views

Using device node of host bus adapter to send ioctl calls to monitor RAID status

I am interested in determining the status of a RAID array on my system (using Debian, and Intel ICH10R sata RAID controller = fakeRAID). What I have learned so far is that: I can use CSMI I/O ...
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0answers
22 views

Moved Raid from NAS box to PC running Ubuntu hdparm shows drives frozen

So I had a RAID5 setup in a Partriot S4 Javelin (a NAS box). I'm now migrating it to a proper server running Ubuntu 14.04. NOTE: There are 4 drives. All the drives show up in Ubuntu. Two show ...
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19 views

Raid 1 or just mirror SATA and USB Harddisk

I think about getting a Cubieboard, and to set up a Linux with OwnCloud. The board has a SATA and two USB Ports. I would like to store the main data on the SATA-HD and use a USB-HD as backup. How ...
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0answers
22 views

Ubuntu raid dirty degraded

I have Linux version 3.5.0-17-generic (buildd@allspice) (gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1) ) #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 (per /proc/version). There are two raid arrays ...
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21 views

Proxmox storage question

I am designing a proxmox installation for use as a home server, I chose it for the inherent flexibility and ease of administration, this restricts me to debian based solutions. So after some ...
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35 views

Change Initramfs script

I made RAID 0 by mdadm'ing partition located on dmraid VIA VT6421 and Western Digital hdd. Installed Ubuntu on that RAID. Now, when I boot, I get (initramfs) ash prompt. There, I have to write mdadm ...
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0answers
135 views

Tuning a CentOS VM running on an MDRAID-based XenServer storage repository

I've run out of ideas for tuning disk write speeds on a handful of CentOS VMs running on a lab XenServer 6.2 host. Running under the free license (so vendor support not a concern), the lab host is a ...
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341 views

Linux won't install on RAID set: disks “contain BIOS RAID metadata, but [are] not part of any recognized BIOS RAID sets”

I plugged a Q-Tec 340R ATA-133 IDE RAID card, with two IDE connectors and support for up to four IDE drives, into an old P4 machine, attached two hard drives and managed to set up RAID0 and install ...
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0answers
574 views

How do I set up raid0 using extra two drives (not the install drive)?

I have been looking around online for a suitable tutorial to help me set up a raid0 across two (or more) drives, but not moving the actual installation of Mint onto that raid setup (I have that on a ...