a utility to administrate Linux Software RAID devices

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30 views

Use RAID0 Array

I'm really new to doing stuff with RAID. I did a fresh install of Ubuntu Server 14.03 and made a RAID0 Array of 3 HDDs. I also set up an LVM on another HDD that's not part of the RAID. The way I set ...
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2answers
9 views

How can I install Ubuntu onto a software RAID 10 array?

I'm planning to set up a low-traffic server using RAID 10 with four disks. I'd like to have Ubuntu 14.04 installed onto that RAID array. I've seen plenty of guides explaining how to set up RAID 10 ...
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23 views

After `apt-get upgrade` mdadm won't auto-assemble RAID at startup

After a simple apt-get upgrade, mdadm won't assemble my intel raid anymore automatically. This leads to fstab entries not being mounted and so the startup fails. I'm dropped into a recovery shell ...
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9 views

special device /dev/mapper/jmicron_JRAID1 does not exist

It is my first post .. so first of all thank you all for the good effort. Concerning my problem now. On my Ubuntu 14.04 I used to have a disk (sdb) on raid (software cannot recall raid type). Suddenly ...
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7 views

One drive removed from RAID5 each restart

After almost each restart my RAID 5 array is being degraded. Very suspisous thing I found in dmesg Log First SDA and SDB logs can be found, Then MD0 - without SDC and then SDC. What can be a ...
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32 views

Why there is no GUI assisted RAID configuration and why RAID is so problematic in Linux? [on hold]

Linux (particularly Ubuntu) slowly becoming a growing OS among PC enthusiasts, content creators and gamers. And most of them have high-end computers with SSD raid setups, latests GPUs and many core ...
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14 views

Software RAID 0 FAILS using mdadm on Kubuntu 15.04

I've read a lot about RAID on linux and decided to go software raid instead of fake. My hardware is 2x Samsung 250GB mSATA ssd in a laptop. So I want to run these in raid 0 configuration. The thing i ...
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16 views

Drive failed in RAID, other drive has SMART errors. Which to trust?

I've had a RAID1 setup running in my machine for a couple of years, and recently the array has become degraded. Looking at mdadm information, it looks like the one drive has failed, but when I look at ...
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26 views

Intel RST (option rom, bios) raid and mdamd, how to?

I have 4 x 6TB hard drives which has been setup for RAID 10 in the BIOS (option rom: Intel RST (v12.7.0.1936)) on my P6T7 WS ASUS Motherboard with modded bios (BIOS) which works : lrwxrwxrwx 1 root ...
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11 views

How to change raid1 to raid 11?

raid1 --> /dev/sdb /dev/sdc raid11 --> /dev/sdd /dev/sde /dev/sdd -> bad sector /dev/sde -> new hard disk I have for hard disk. And I have created two raid in that with raid array raid1 ...
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15 views

How do I change my RAID configuration(mdadm)

I would like to change my current partitioning and RAID configuration without reinstalling Ubuntu 15.04. Here is the output of sudo fdisk -l: md0 is /home and md1 is /tmp I would like to change it ...
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20 views

Mdadm array showing as UUID?

I have an ssd with ubuntu and then 4 hdds in a mdadm array. I had to reinstall ubuntu and now am seeing the array but only mounted as the UUID and the array appears as an external drive in ubuntu. ...
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37 views

Is TRIM Supported for RAID0 in Intel Matrix RAID in Ubuntu 14.04?

It appears that TRIM is supported for RAID0 arrays with mdraid in Ubuntu 14.04. Intel now supports TRIM to Intel Matrix RAID (RSTe) RAID0 as of series 7 chipsets (and Intel's Windows driver). Ubuntu ...
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48 views

Software RAID disapears after rebooting

I'm currently trying to setup a media server and I'm having issues with my software RAID. It seems like once I reboot the server the RAID doesn't get assembled despite there being an entry in the ...
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18 views

How to remove erroneous busy flag in mdadm

I have a system that I'm trying to configure and update to Ubuntu 14.04 LTS. I have a pair of drives which were previously the boot system. There are four RAID-1 sets: sda1 and sdb1, sda2 and sdb2, ...
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13 views

RAID Array Check

I just created a RAID using the command below sudo mdadm --create /dev/md0 --level=linear --raid-devices=5 /dev/sda /dev/sdb /dev/sdd /dev/sde /dev/sdf Now how do I check its working, and is there ...
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36 views

New Server - Need Backup Strategy Assistance

I previously had an Ubuntu 12.04 LTS server that I was running off of a single 2 TB hard drive. I had also installed CrashPlan on it and was backing up some data from it to the cloud (including the ...
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17 views

Unable to boot after replacing faulty mdraid1 disk

My server has 2 RAID-1 disk configured trough mdraid. A couple of months ago, one of the disks died, so I replaced it. After booting, Ubuntu took some to time to (which I presume was) copy everything ...
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2answers
54 views

Ubuntu 14 Raid not booting

i'm having issues for booting my Ubuntu 14.04 Server. I have two discs 320GB. I upgraded the disks from two 160GB and everything was working ok. Those disks were one IDE and the other SATA. Now both ...
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1answer
70 views

Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?

I (stupidly) ran sudo apt-get dist-upgrade, which partially succeeded, but now I get output similar to this every time I try to (un)install a package: Here, for instance, is the output of sudo ...
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19 views

Mdadm slow raid6 creation

Currently I am creating raid 6 on 4 4TB hdds. When I use the command "cat /proc/mdstat" The returning info tells me I'm 57.9% with 26516.7 min speed 1032K/sec That seems like a really long time. ...
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37 views

Raid 6 mdadm creation error

I am trying to create a 4 drive raid 6 with mdadm in Ubuntu. The command I am using is sudo mdadm --create /dev/md0 --level=6 --raid-devices=4 /dev/sdb /dev/sdc /dev/sdd /dev/sde the error I am ...
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12 views

wd mybook world edition. mdadm package

After cleaning the disk I want to put new firmware on the disk. This has to be done according to different tutorials with Ubuntu. So this is completely new for me as a normal windows user. In the ...
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15 views

How could I set raid1 members to be offline temporary, to remain ready for use?

I have home server that is unused most of the time. So I wish to let spinning discs in it to go sleep. I gave up trying to stop rootfs writes waking up all drives permanently, so there is SSD disc for ...
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1answer
90 views

Intel RST Raid 0 ntfs mount from damaged disk

a friend of mine had an RAID 0 Array of two 500GB HDDs (Windows - NTFS - Dell preinstalled) and one seems to have an bad sector. So i started the PC from Ubuntu Live Disk (15.04) and tried to assemble ...
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92 views

Remove disk from mdadm array, Raid 0

I have a 2 disk mdadm RAID 0 volume, 4TB total, created in Ubuntu 14.04 server. The volume is less than half full and I'm looking to unraid the disks, keeping the data so that I can use one of the ...
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38 views

mdadm build legacy array on boot

I have RAID0 that was built using windows dynamic disk. I've read that this is a legacy array and can be assembled using build in mdadm. I've gotten the array to build and mount using the following ...
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1answer
102 views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
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44 views

RAID1 /dev/md0 showing up as /dev/md126 after reboot

I've already configured the file: /etc/mdadm/mdadm.conf with the outcome of : mdadm --detail --scan ARRAY /dev/md0 metadata=1.2 name=compute2:0 UUID=4e0dd53b:c29a881a:795286f7:a649ff4a ARRAY ...
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95 views

Rebuilding a RAID 1 array on a production server (Ubuntu 12.04.2 LTS)

I manage a production server which has a RAID 1 array with two identical hard drives. Apologies in advance, I've read many threads on this but due to the critical nature of the server, it will save ...
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33 views

RAID 1 disk from old server not recognized when taken off to a new machine

I had an old Ubuntu server at home, with two 1TB HDD in RAID1 configuration. I stored a lot of my works and stuff there, then eventually stopped using the server and let it get the dust for some time. ...
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1answer
75 views

Slow raid5 resync with WD Green drives [closed]

The Question Why is my initial resync so slow? Initially cat /proc/mdstat reported ~ 30000K/sec. I then increased /sys/block/md0/md/stripe_cache_size from 256 to 16384. That increased the speed to ...
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111 views

Rebuild a vaporized dmraid array using mdadm

Executive Summary While upgrading from Utopic to Vivid, my system removed dmraid, which I was using as the RAID controller for the array that I booted from. How can I rebuild the array using mdadm ...
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10 views

Anyone else having trouble accessing dynamic windows partitions from Ubuntu?

So, I have been trying to access my striped (software raid disk from Ubuntu) for at least six months. Now I know there are guides out there, but they are a bit hard to follow, at least for me. So I ...
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95 views

Can't mount RAID5 Array - Ubuntu Server 14.04

My server froze last night so I had to do a cold reboot, upon logging in I couldn't see my RAID5 Array mounted, I checked in Disk Utility to start the array but recieved this error message. Error ...
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35 views

is it possible to undo convertion from raid5 to raid6?

I converted my 3-disk RAID5 to RAID6 with : mdadm --grow /dev/md1 --level=6 --layout=preserve --force The change was immediate, (no rebuilding - there was no extra device, it was still 3 drives), ...
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37 views

Software RAID 1 is only showing half its expected capacity

While installing Ubuntu 14.10 I manually partitioned and set up software RAID 1. I have 4 HDDs, each 2 TB. On each drive I set 8 GB of swap space and made the rest ext4 and bootable (both as software ...
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64 views

RAID not assembling after reboot, throws “uuid not in config file” even though it is

I created a RAID5 array using 4 x 2.0Tb drives using the disks GUI. I used mdadm --detail --scan >> /etc/mdadm/mdadm.conf to save the configuration. I opened the mdadm.conf file and double ...
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47 views

Shouldn't have left SATA port empty when creating RAID?

I recently added an md RAID5 to one of my computers. The boot & root filesystems were on the motherboard's SATA port 1, which became /dev/sda. I left port 2 empty for future use (oops?!) and ...
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269 views

Ubuntu 14.04.2 LTS Boot fail after installing mdadm…“Incrementally starting RAID arrays…”

I am testing Ubuntu 14.04.2 LTS on Virtual Box. My ultimate goal is to build a real world RAID1 SAMBA home server. This is my first foray into a Linux distro. I have come a long way in the last 2 ...
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147 views

Software RAID and Ubuntu 14.04.2

I recently changed my Plex server from the headless Ubuntu Server 14.04.1 to Debian 7.8, during which stability issues sprouted up with my software RAID which I thought were tied to Debian. I ...
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41 views

How to start RAID array?

a few months ago two volumes in my Synology DiskStation 412+ NAS crashed and until now I am still unable to recover the data but I am motivated and won't give up. I am able to see the hard drives ...
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102 views

Software RAID with FakeRAID already enabled Ubuntu 14.10

Somewhat new to the Linux world, so I apologize if this seems a bit foggy: I dumped a bunch of drives into an old case with the goal of making a Ubuntu NAS. I enabled the on-board RAID option on my ...
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59 views

12TB storage, can someone help me? :)

I have thought about making a RAID 5 with 4 hard drives, 4TB each. There are files with few KB and other files with some GB. I want it to be as stable as possible. This will not be mounted as / or ...
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2answers
206 views

Upgrade 12.04->14.04 broke mdadm RAID10. Boot stops

Server was an Ubuntu 12.04 x64 and was running just fine. All four drives in server are SATA spin-drives. /dev/md0 - swap RAID10: sda1, sdb1, sdc1, sdd1 /dev/md1 - root RAID10: sda2, sdb2, sdc2, sdd2 ...
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244 views

Raid Drive Won't Assemble

I had a server with Raid 5, and I wanted to wipe everything and do Raid 10. I deleted the raid 5 as best I could, zeroing superblocks, removing it from fstab, etc. And I created the raid 10. Now, I ...
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87 views

failed/degraded raid5 array recovery

First, thank you for your time and effort with helping to recover this raid array. I have a personal raid 5 array that is in rough shape. The failed array has eight 2 TB drives that were built up ...
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182 views

How to install Ubuntu Server 14.10 on an existing IMSM container (mdadm) of a machine that does not support the EFI specification?

How can I install Unbuntu server (14.04LTS or 14.10) on an existing IMSM container (using Intel's RST technology) on a machine that does not support the EFI specification? This is actually a business ...
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359 views

Fakeraid in Ubuntu 14.04 wont auto assemble on boot

I'm trying to setup a 4TB raid 1 using fakeraid (intel matrix storage manager) as secondary storage. I'm able to assemble the raid manually using mdadm with the following commands: sudo mdadm ...
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91 views

Going from a single 3TB disk to a 4-disk 6TB RAID10

I have a 3TB standalone disk (EXT4 in a 4-bay eSATA box) that I would like to integrate into a RAID10 array by adding 3 more 3TB disks. I'm hoping to do this nondestructively, as it would take ...