RAID stands for redundant array of independent disks, and allows for disks to be linked in various ways. Common RAID setups in Ubuntu are a hardware RAID, FakeRAID and software RAID.

learn more… | top users | synonyms

2
votes
2answers
8k views

Ubuntu 12.04 installation on GPT + RAID going into grub rescue [closed]

I have two 2TB disks. I am installing Ubuntu 12.04 using the alternate version of the server cd. On the partitioning page I have done my partitioning as follows /dev/sda1 - 32 MB - bios_grub ...
2
votes
3answers
2k views

get rid of software raid

We are running software raid1 using MDADM on ubuntu 11.04. What's the best way to get rid of it Keeping the current system ? I want to use hardware raid instead. What I tried to do: -Copied the ...
2
votes
0answers
478 views

Raid won't mount on boot after reinstall [duplicate]

Possible Duplicate: MDADM Superblock Recovery So I was having a lot of trouble with Ubuntu after upgrading to 11.10. I decided to do a clean install, and things seem to be much better. ...
2
votes
1answer
729 views

Is Error Recovery Control or TLER necessary for software RAID5 using LVM

I ave been told that for RAID configurations you don't what to use standard desktop drives because they when/if they enter a error recovery mode they might time out and get dropped from the raid. Is ...
2
votes
3answers
810 views

Tips on setting up raid10 on *buntu

I'd like to set up a software raid 10 array (4x2TB) for a workstation using a fresh install, but I'm finding non applicable/conflicting/old resources online. I'd like to get the community's advice on ...
1
vote
5answers
6k views

Why isn't md raid assembled after reboot?

I'm trying to get an Intel RAID setup. The problem I have is that after a reboot the raid is not available. These are the steps I go through to setup the Intel RAID using the mdadm command. I've ...
1
vote
3answers
14k views

Problem installing 14.04 in VMPlayer

I'm just trying to install Ubuntu 14.04 in VMWare Player. It has a single huge (300 GB) partition and so I expect it to take some time, but after a few minutes, this message came I'm unsure what ...
1
vote
2answers
104 views

Thinking of switching to Linux, a few questions.. [closed]

Im wanting to switch from windows for a while without having to upgrade to windows 7/8 but i wanted to know if what I want to do is supported.. Im currently using a Gigabyte g41m-es2l and intel ...
1
vote
2answers
114 views

Is there a way to upgrade a machine which is using software raid and LVM to 12.10?

I realize Ubuntu has dropped the alternate cd for 12.10, which broke this long-time user's heart. I always do a fresh install when upgrading, but I have software raid and LVM, and as far as I can tell ...
1
vote
3answers
73 views

Deleting contents of a disc

I need to completely delete the contents of the folder /data Obviously I launched rm-rf * but it's been running from a long time (I have many large files for a total of nearly 1 TB). Given that the ...
1
vote
1answer
514 views

Is the Alternate Ubuntu installer still required for LVM or Software RAID setup?

Over the past 5 years, I have been setting up Ubuntu servers using the Alternate installer. I need to provision a new server today, and I'm curious if the Alternate CD is still the only way to setup ...
1
vote
1answer
390 views

RAID array rebuilt no longer mounts — isw_ *randchars*_STRIPE changed

I have a RAID 5 system, ICH10R, on a eVGA classified x58 motherboard. The RAID failed because of an application failure in Windows 7 (dual boot) which forced a hard restart. I rebuilt the array ...
1
vote
2answers
113 views

High CPU load, low core usage, (ECC) memory error in kernel

I am having a super weird behavior ... The CPU load of my computer goes through the roof (>4 on a 8core machine) but there is no process that is taking much CPU (see attached image) Though the 8 core ...
1
vote
1answer
137 views

RAID - Ubuntu vs. Gentoo [closed]

I'm migrating a PC working as file server from Gentoo to Ubuntu. Gentoo doesn't recognize the RAID by BIOS because apparently Gentoo connects with each and every individual hard drive directly. ...
1
vote
1answer
2k views

Ubuntu Desktop 14 on PowerEdge doesn't boot on RAID

I have a Dell 1U PowerEdge 1950, and for some reason, we cannot install Ubuntu 14.04 64bit Desktop edition on it. I know what you're thinking... why are you installing desktop? I have asked the same ...
1
vote
1answer
14k views

How do I install the LSI megacli in Ubuntu?

Similar to this question (http://serverfault.com/questions/192394/megacli-always-returns-blank-output) with some differences. I am using perc h710p raid controller on Dell Ubuntu box. I downloaded ...
1
vote
3answers
4k views

Software Raid0 doesn't mount successfully in fstab

I have created a Raid0 and it works as I expect it. The the array file is created at /dev/md0. I want this to be mounted automatically by adding this line at the end of the /etc/fstab file : /dev/md0 ...
1
vote
1answer
482 views

RAID (mdadm) - Flags necessary?

As I understand it, it's best practice to set the drive flags as "raid" before adding them to a mdadm raid array. Okay fine, but I also heard people say that they didn't do this and mdadm worked fine. ...
1
vote
1answer
9k views

How to make GRUB2 detect and boot Ubuntu on a RAID 1?

grub 2 is unable to detect /dev/md1 which is a raid 1 drive on my computer. When I press c in grub menu and run ls I get a list of all the drives but don't see md1 for booting Ubuntu which is on ...
1
vote
1answer
2k views

Installer Only Recognizes 801GB of a 3TB RAID1 Array

I've been searching as best I can for this precise problem, but the only place I found it exactly was here, and I don't think that the OP ever got an adequate answer. Most of the issues I've seen ...
1
vote
1answer
342 views

are there any issues creating a tmpfs mount when my root partition is a RAID5 array

I have a new Ubuntu 11 server install created per the wiki with the following partitions: md1 : active raid5 sdc5[2] sda5[0] sdb5[1] 1935813632 blocks super 1.2 level 5, 512k chunk, algorithm 2 ...
1
vote
2answers
3k views

Ubuntu Server “fakeraid” RAID5 installation [closed]

I'm trying to install Ubuntu 10.04 server edition on a computer with a RAID5 array. The array seems functional from the BIOS standpoint. The problem arises in the installation when it comes to ...
1
vote
2answers
48 views

How do I create a software raid on non system drives in Ubuntu 14.04?

The OS is installed on a standalone SSD, but I have 3x 1TB drives I want to configure in a RAID 5 for docs, applications, games, etc. How do I do this? I've searched Google but the only results I ...
1
vote
1answer
831 views

Raid 6 on btrfs in Vivid

Hi I'm trying to make a Raid 6 on multiple drives in Ubuntu 15.04, Btrfs is already running on 4 in raid10 when I do sudo btrfs balance start -dconvert=raid6 -mconvert=raid6 /mnt/storage/ it ...
1
vote
1answer
741 views

BTRFS bad tree block start

First some background on my setup. I have 7 Hard Drives in a raid 5 (I know, move to raid 6, but not the issue here) array. On top of that, I run LVM, with a partition for btrfs. BTRFS is at version ...
1
vote
1answer
133 views

Ubuntu 14.10 does trim SSD RAID 0 discs?

I've got Ubuntu 14.10 in a RAID 0 set up with 2 x Samsung Evo 840 SSD 256Mb, for performance reasons while acessing/modificating very large files. I've also got a schedule backup to another HDD for ...
1
vote
1answer
44 views

Mounting Drives, Replacing with an Array

So I currently have a boot drive, and a 500gb Drive, and a 2TB Drive. I have just aquired a HP ProLiant Microserver, and I will be aquiring 4x2TB Drives in around a month, which I will put in Raid 5. ...
1
vote
1answer
100 views

Guidance on moving a raided / to a new set of disks

Running Ubuntu 14.04.1 up to date. Besides a ZFS pool I'm using for my data, I have my root partition on a mirrored software raid, and would like to move to two larger disks. Here is my parted ...
1
vote
1answer
4k views

mount an mdadm raid 1 drive at boot

I was wondering if you guys could help. I am looking to mount my mdadm RAID 1 at boot. The drive location is /dev/md127 and I would like it to mount to /media/server at boot. It is formatted to ...
1
vote
1answer
314 views

What should I use my SSD for? [closed]

I am setting up a small (1 user) email server. So far I have put in 2 x 1TB WD Red drives and set them up for LVM with RAID1 mirrored LVs. I also picked up a 120GB Samsung 840 Evo but I can't figure ...
1
vote
1answer
138 views

How do I set up RAID 1 on only a portion of my HDDs, post Ubuntu 14.04 installation?

I'm trying to set up a mirrored (RAID 1) "file cabinet" consisting of the remainder of sda, after "/" and swap have been set up and Ubuntu installed, plus the equal amount of Gb space on sdb, ...
1
vote
1answer
938 views

How to force update-grub to use UUID?

When I run "update-grub", the file "grub.cfg" will contain lines like this. menuentry 'Ubuntu...' { ... linux /boot/vmlinuz... root=/dev/md124 ... ... } For the line of linux, is it ...
1
vote
1answer
4k views

Recovering a degraded RAID array

I was just given an external hard drive by a colleague, with the comment "Hey, you're running Ubuntu. Maybe you can recover some of the data from this really old disk that nobody knows who last used?" ...
1
vote
1answer
2k views

hpacucli on HP ProLiant DL320e Gen8 with Ubuntu 12.04LTS 64bits

I'm trying to get working the HP Smart Array utility "hpacucli" on a ProLiant DL320e Gen8 server since it's officially certified. The program is installed successfully (I followed this guide) but ...
1
vote
1answer
2k views

How to install ubuntu on a raid 5 array using mdadm

I want to install Ubuntu 13.04 (not server), I have 4 empty hard drives (/dev/sda, /dev/sdb, /dev/sdc, /dev/sdd), each 150 gb and /sdd is 160 gb and I have a Live USB. I want to install Ubuntu on a ...
1
vote
1answer
2k views

How do I migrate to a RAID10 array without losing data

I am running Ubuntu 12.04LTS, OS is installed on a small SSD so that should not be an issue when modifying the RAID array(s). I currently have four 2TB WD Caviar Green drives that I would like get ...
1
vote
2answers
2k views

Installing Ubuntu Server 12.04 on HighPoint RocketRAID 2720SGL RAID 5

I've installed a HighPoint RocketRAID 2720SGL card that I've connected 3 x 1.5 TB HDDs. After creating a RAID 5 within the RocketRAID BIOS using the 3 disks, I am attempting to install Ubuntu Server ...
1
vote
2answers
2k views

Installing problems with Dell Vostro 3460

I'm having problems installing 12.04 or 11.04 in a new Dell Vostro 3460. The issue becomes on the "Raid" performance that comes with the laptop, a 500GB HDD and a mini SATA 32GB SSD. With Windows ...
1
vote
3answers
1k views

Win7 -> Ubuntu 11.10 - Win Dynamic Disk Raid 1

I imaged my win7 system disk via ntfsclone + dd (mbr) to one of my Win7 Dynamic Disk RAID1 disks from within the Ubuntu LiveCD instance (only wrote to one of the disks in the win7 RAID1 array). I did ...
1
vote
1answer
253 views

Why is new raid 5 build 'recovering'?

I am building a home server with raid 5. I first set up the system to boot from compact flash. After i got that working I tried to create the raid 5 array. All disks are new and have no data on them. ...
1
vote
1answer
479 views

Do I have a raid or not?

I am building a new (power) system. MOBO is a ASUS Sabertooth 990FX. I've installed: 1 500GB HD for the OS and user accounts (mounted at /) Three 2TB drive set up on the BIOS as a single raid0 ...
1
vote
1answer
2k views

error: no such device: GUID

I have an old(er) machine that I'm trying to wipe out and install ubuntu 10.04. The machine has 4 500GB HDDs that were previously set up as a raid. When I run the installer, it asks if I want to ...
1
vote
1answer
2k views

Should I disable write cache in an mdadm array?

My gut says disabling write cache on soft RAID5 is the smart move, but I'm not certain. Possible Considerations: The drives a WD20EARS with 64Mb cache. The server hasn't gone down due to a power ...
1
vote
2answers
2k views

Using btrfs in RAID arrays and partitioning

Probably stupid questions but here goes: Can btrfs use only a portion of a HDD in a raid "array"? I have 3 HDDs: 80GB, 160GB, and 200GB external USB. I want to put root+boot in the first 20GB of the ...
1
vote
1answer
1k views

Mdadm seems to have completely forgotten about a device and shrunk my array

After a bit of investigating of a problem I've just encountered, it looks like mdadm has completely forgotten about a new device I'd added to an array. I recently added a new device to the array which ...
1
vote
1answer
441 views

Does rebuilding a RAID change data?

I've just restarted my computer which was building up a RAID5 for the first time. This of course meant that my computer had to rebuild the whole thing from ground up. Before I restarted the computer ...
1
vote
1answer
149 views

Any howtos on de-Xen'ing a box? [closed]

I have a box that has Xen on it. It currently has only one DomU. Given that Xen isn't supported in the newer versions of Ubuntu...are there any good HOWTOs or other instructions for removing Xen? ...
1
vote
1answer
147 views

MaaS node deployment failing on HP Proliant DL380 G5

i have a little lab environment with 3 DL380 G5s. All of them have 2 disks forming RAID 1+0. Got one set up as maas controller with ubuntu 14.04 (had no problem using LVM to install Ubuntu on the ...
1
vote
1answer
51 views

Restore RAID Drive on New OS

I had a problem with my Debian operating system on my SSD and have removed it (Debian) to install Ubuntu server. Originally, on my Debian operating system, I had installed mdadm and had a spanned ...
1
vote
2answers
73 views

How do you get a raid with 4 terabytes to give you the full disk amount in ubuntu server

I am running Ubuntu server 14. I have two 2 Terabyte Seagate drives raided to make a 4 terabytes. However when I mount the logical drive and run sudo lshw -c disk it shows as having 3999 GB of room. ...