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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Install of manjaro linux on Raid 0

Im trying to install gnome manjaro on my raid 0 ssd's along side my uefi windows 8. The GUI installer proceeds without problems but when I try to boot the system gets stuck on the manjaro load screen. ...
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51 views

Running a btrfs RAID 5 array on Arch Linux

For two weeks, I've been trying to run my Raspberry Pi (model B) as root from a btrfs RAID 5 without success. The RAID runs on three 1TB disks /dev/sda, /dev/sdb and /dev/sdc. The three disks were ...
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mdadm - Can't Remove Components In RADI1

I have my /boot partition in a RAID 1 array using mdadm. This array has degraded a few times in the past, and every time I remove the physical drive, add a new one, bring the array being to normal, ...
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20 views

Required GRUB modules for booting on mdadm RAID1

I have a mdadm-managed RAID1 with a single EXT4 partition on it (having both the OS files and GRUB's files in /boot/grub), and I'd like to know what modules and what configuration do I need for GRUB ...
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Should I replace HDD in raid array every N years even if disks aren't corrupt? [migrated]

Typical scenario: I made a raid 1 array out of 2 disks, that contains data I wouldn't like to lose. I found that average life-time of HDD (rotating drive) is 3 - 5 years. Does it mean that if the ...
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1answer
32 views

Resize MDADM/Software RAID underlying partition and filesystem

I am running out of space on my root partition and would like to steal some from a different partition. The drives are 2x120GB with mdadm software RAID. I am using CentOS 6.5 64-bit. I used the centos ...
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1answer
79 views

Repairing a RAID5 array

For a friend I'm trying to repair a RAID5 array, consisting of 3 2TB disks. After working perfectly for quite some time, the computer (running Debian) suddenly wouldn't boot anymore and got stuck at a ...
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2answers
39 views

Disassemble a RAID 1 arragement without removing/reinstalling the system

I've set up a Soft Raid 1 using Debians built in RAID systems. I set up the raid because I had a space HDD when I set up the server and thought why not. The RAID is set up using what-ever Debian did ...
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49 views

encrypted btrfs RAID1 array fails to mount at boot - open_ctree_failed

I have an encrypted btrfs RAID1 array set up as my /home directory on a fresh install of Linux Mint 17.1. At the Plymouth screen during boot, I enter my password for the two drives, and then receive ...
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26 views

Storing documents and backups on several different drives

Currently I have Ubuntu installed on a 120GB SSD. However I also have 3 more hard drives installed on the computer, 2 x 640GB in aRAID array and a 60GB SSD. What I am trying to achieve is to use the ...
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4answers
60 views

RAID 1 on server - need file from mirrored drive

About 3yrs back I had setup an Ubuntu server for a medical clinic. I had set in 2 HDD's for the purpose of having RAID 1 (software RAID) Today suddenly they can't access a table on one of the mySQL ...
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25 views

HW RAID10 without TRIM support with SSD

Recently we purchased new server for Database with 1TB x 4 SSD in Hardware RAID 10, but my Hardward RAID doesn't support TRIM so you think it is going to be big deal? Is there anyway i can do ...
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28 views

How to assemble a specific RAID array without using /etc/mdadm.conf

Is it possible to assemble a specific RAID array using mdadm and its scan-functionality, but without the need for a configuration file? Background: I'm using a custom-made initramfs to setup my ...
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1answer
152 views

How mdadm recognizes which device is right one to sync others with

Imagine you have mdadm raid1 with 2 disks. Then you turn off the server, split the disks each one to different machine and boot both of them, so they will become slightly inconsistent Now you turn ...
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1answer
61 views

mount mdadm disk without partition table

I've a debian installation and during the installation I had made 3 mdadm raid disk: swap, root and home. I had done it with partman and it had made the mdadm disk without partition table. Now I want ...
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2answers
43 views

challenging failed raid5 recovery

I have a personal raid 5 array that is in rough shape. The failed array has eight 2 TB drives that were built up over time in my n-2 desktop machine. The array is from an in-house computer that ...
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1answer
36 views

Rebuild linux raid array?

I'm going to be building a media server soon and I want to know how hard it would be to rebuild an array in the event of an ssd failure. Here's what I'm doing. I'm going to have a 128GB SSD boot drive ...
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2answers
212 views

Slackware 14.1 software raid kernel panic unable to mount root fs

Trying to install slackware onto a raid 1 on 2 2TB drives. I followed the official readme. I have two drives, sda and sdb. They each have two partitions, one for /(50GB) and one for /home(Rest of ...
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Looking for a new conf for HA Data Server and Virtual Machines with Glusterfs

I own three HP server for lots of users and email, web and a development machine. I want to make my virtual machines to be available all times, but have some issues. My configuration is as follows: ...
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205 views

Dual Boot Debian on Raid 0 in UEFI mode

My new notebook came from the factory with Windows 8 on two 128GB SSDs in RAID 0 mode. I wanted to dual boot it with a Linux distro, I settled on Debian, so I resized my C: drive as one normally would ...
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167 views

How to map a sata device name to a physical sata interface for RAID systems

I have a system with 10 SATA ports, and another SATA as the boot disk. The 10 SATA ports make up 5 software RAID1 arrays. The RAID disks may be removed between boots, and swapped in with arbitrary ...
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SCSI's, SATA's, RAID's oh my. Please direct me the wizard of RAID recovery [closed]

I have 4 disks (SATA) that I am 95% certain belong to a raid. The client/boss handed me a box with some disks in them and said recover data, reuse disks. There is another SCSI drive that I suppose ...
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2answers
318 views

Replace both disks in a raid 1 mirror

I have a 3 years old server with two same disks. I'm planning to replace both before they fails. Can I add two more new disks to the raid and (after it has been rebuild) eventually remove the two old ...
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325 views

Why does my RAID 1 NAS have to “synchronize”?

I have a new QNAP TS-451 NAS with two new 3TB drives, installed as a RAID 1 pair. As I copy data on to it, it seems to spend the next few hours "synchronizing" the RAID group. (The web console shows a ...
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231 views

installing Centos 7 and configure RAID 10

I had a system with 4x500GB HDD and a 16GB pendrive. I would like to build a homeserver with RAID 10. Currently i use nas4free. But i am planning to setup a local file server as well as a webserver. ...
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819 views

HP Microserver Gen8 (Intel Celeron G1610T) with Ubuntu Server 14.04?

I'm looking for a small home server working with Ubuntu Server 14.04. I want to install SAMBA and a UPNP streaming server on it. I found this small HP Proliant Microserver with an Intel Celeron G1610T ...
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46 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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69 views

An existing mdadm RAID5 is not mounting, Either a problem drive or Superblock

I have 4 x 3TB NAS setup as RAID5 which has been working great for almost a year. After a recent abrupt shutdown (had to hit the power button) the RAID will no longer mount on boot up. I've run: ...
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2answers
47 views

Are RAID formats compatible across distributions?

I'm planning a NAS/home media server build, probably with a HP Proliant Microserver. It will probably have two HDDs in RAID 1, while the OS while run from a USB drive. Question is: once I've set up ...
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46 views

Backup and restore of raid1 device, after OS upgrade

We have a physical RedHat server with two 60GB local disks, and two RAID 1 devices on them. There are also a few multipathed SAN luns. Disk /dev/sda: 60.0 GB, 60022480896 bytes Device Boot ...
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BTRFS - Raid incomplete after balancing

I have two 3TB drive that are formated as btrfs and mounted on /media/andy/btrfs as one drive. I run btrfs balance start -dconvert=raid1 -mconvert=raid1 /media/andy/btrfs/ which takes forever. It ...
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237 views

RAID-1 doesn't Assemble, elements listed as SPARE, how to recover?

I recently moved my Kubuntu 12.04 workstation to a new location. It was shutdown normally but when I rebooted it in its new home the RAID-1 array /dev/md0 was GONE! The Elements of the array are ...
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2answers
66 views

Raid 5 not starting

I had a raid 5 with 3 disks in my old computer, but the motherboard died. I put all the disks in a New computer, but the raid doesn't want the start anymore. When booting the pc, i can see all ...
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510 views

mdadm RAID 5 and parted unrecognized disk label

I have three 3 TB drives that I am attempting to put together into a RAID 5 setup with mdadm, but I am running into some issues. (Actually, I have four 3 TB drives I will be using, but one of them ...
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33 views

Mdadm not adding all disks to raid

A couple of years ago, I installed a raid 5 with mdadm on a fedora box. The old hardware died recently, and I have put the boot disk in a newer desktop pc, and added the thee raid disks via usb. So ...
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1answer
140 views

vPrevent Debian from auto-assembling raid at boot

I set up a Debian wheezy (7.6), installed openmediavault, and created a software raid 5 with that. It is listed at /dev/md127. Now I want to move that to a virtual XEN VM. To do so, I have to stop ...
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Software RAID10 setup writes small files extremely slowly, is this normal?

I have a software RAID-10 setup on Linux 3.16.6-203.fc20.x86_64, with 1.2 metadata and the default chunk size (512K): $ cat /proc/mdstat md0 : active raid10 sdc1[4] sdb1[0] sdd1[2] sde1[3] ...
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1answer
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Grub fails to install - Debian Wheezy with mdadm RAID1 and GPT partition table

I've been trying all day to get my new Wheezy install completed but it fail to install Grub every time. I'm using x64 netinstall iso. Here is my partition table: Model: ATA ST3000DM001-1CH1 (scsi) ...
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1answer
46 views

mdadm - What's the difference between --detail --scan and --examine --scan?

From man mdadm: -E, --examine Print contents of the metadata stored on the named device(s). Note the contrast between --examine and --detail. --examine applies to devices which are ...
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233 views

btrfs balance fails due to enospc error

[taken over from stackoverflow since I figured that was probably the wrong place] I am currently testing btrfs as a possible replacement for my NAS running ZFS. I created 4 devices, 20GB each, and ...
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25 views

Files and Directories Dissappearing from Software Raid on Power Failure

I have a home samba file "server" (a raspberry pi) with two hard drives in a software raid 1, which have proven less reliable than any of my non-raid disks. I know there is a chance for data ...
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2answers
108 views

Spanning RAID over SSD and Mechanical HD

Currently I have my root (/) directory on my ssd, and my home directory on my mechanical drive. Wanting to utilize more of the ssd and hopefully get a speed benefit, I was considering spanning across ...
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File transfer between SSD and RAID array uber-slow

It's really simple: this server has an SSD for the main drive, and a RAID array (mdadm) for storage. Intermittently, it has a problem writing to the array: the write speeds slow down to the point ...
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2answers
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Whose responsibility is to divide data into PEs or chunks?

When we create LVMs or the RAID partitions, the data we save in the parition is divided into PEs or the chunks respectively instead of the conventional blocks of ext3 or ext4. My doubt is whose ...
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231 views

A SparesMissing event had been detected on md device /dev/md0

I'm getting the following mail every day on a server: This is an automatically generated mail message from mdadm running on <host> A SparesMissing event had been detected on md device ...
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54 views

server can't read newly installed centos 6.1

I have a server that has 12TB and I used RAID 1+0(RAID 10) so my logical drive in the server is now 6TB + (6TB Mirror) when I install the CentOS v.6.1 in the server, the installation has no problem at ...
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45 views

Linux SW RAID and physical volumes

In each guide about software RAID in Linux, I could find online I see that people usually create/assemble RAID devices using partitions, like: mdadm --create --verbose /dev/md0 --level=5 ...
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492 views

How to combine multiple HDDs into one big HDD in Linux?

I'm very new to Linux, being mainly a Windows 7 user, so I may not understand Linux-specific commands without explanation. I've decided to build a NAS running some form of Linux (probably FreeBSD or ...
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1k views

How to install Debian Jessie properly onto multiple devices with BTRFS in mode RAID 1?

As a short introduction I'm going to tell you, what kind of setup I have and what I want to achieve. After that I try to explain my problem. Since this is my first question on U&L I have to ...
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587 views

How to make Intel fake RAID 0 volume appear on boot with Ubuntu 14.04 in a multi-boot environment?

I have a computer with a Gigabyte GA-Z97N-Gaming 5 mainboard, a 256 GB drive for booting and two 3 TB drives meant to use in a RAID 0 setup with both ext4 and NTFS partitions. We are planning running ...