Ubuntu Installation :: 10.10 Software Raid Not Auto Assembling On Boot / Fix It?

Mar 5, 2011

10.10 software raid not auto assembling on boot
I have a software raid from an 8.10 install

Ubuntu 10.10 does not auto assemble it on boot up, how do I fix this?

I didn't see a way to do it looking all over the web. But when running

mdadm --assemble --scan

from the terminal the raid starts and works fine

My mdadm.conf is in /etc/mdadm and is as follows code...

The partitions are indeed marked as linux raid autodetect

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Software :: RAID 5 Array Not Assembling All 3 Devices On Boot Using MDADM - One Is Degraded

Aug 31, 2010

I have been having this problem for the past couple days and have done my best to solve it, but to no avail. I am using mdadm, which I'm not the most experienced in, to make a raid5 array using three separate disks (dev/sda, dev/sdc, dev/sdd). For some reason not all three drives are being assembled at boot, but I can add the missing array without any problems later, its just that this takes hours to sync. Here is some information:

[Code]....

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CentOS 5 :: Mdadm Not Assembling Raid?

Oct 21, 2010

I have a previously defined RAID5 (4 disks). This worked in Ubuntu 8.04.. I recently moved to CentOS5.. and I cannot seen to get the drive back online.cat /proc/mdstat shows, no raid levels (personalities).. and no drives listed.mdadm --detail -scan returns nothing.mdadm --QE returned a UUID string.. and the ARRAY output.I can mdadm --examine all the members of the original array.I am not versed in mdadm enough to really understand what I can run and should not run that would erase the data on the drives. Please assist.. I will try to post exact output of commands.. but the system is kind of unreachable and being rebuilt... i just want to ensure my data on the array is not lost

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Server :: Raid 10 Not Assembling Mdadm Assembled From 2 Drives - Not Enough To Start The Array?

Feb 20, 2011

This is message I get when I try and start itmdadm: /dev/md0 assembled from 2 drives - not enough to start the arrayBelow is the information I've collected about any help on how I can get the raid back up and going to I can get the data off of it would be awesome

sudo mdadm --examine --scan -v
ARRAY /dev/md0 level=raid10 num-devices=4 UUID=91c36708:a7cbb532:5b51dc92:ba008491
devices=/dev/sdd1,/dev/sdc1,/dev/sdb1,/dev/sda1

[code]...

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Ubuntu Servers :: RAID-5 Recovery (spare/active) / Degraded And Can't Create Raid ,auto Stop Raid [md1]?

Feb 1, 2011

Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.

Now the array is (logically) no longer able to start:

mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]

I was able to examine the disks though:

Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....

Code:
mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.

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Ubuntu Servers :: Getting Md Raid To Auto Assemble On Boot

Jun 20, 2011

I have Ubuntu 10.10 (maverick) and I'm using mdadm 3.1.4. I have created a RAID 10 using imsm as the metadata, and this runs successfully if I assemble the RAID from the command line. My question is: How do I get the RAID to auto assemble when I boot the system? I would like to be able to mount the RAID when the system starts up (but the OS is on a separate disk altogether). What I've found out so far is that I must do a Code: update-initramfs -k all -u AFTER I've modified the /etc/mdadm/mdadm.conf file. This is what I've got in my configuration file:

[Code]....

BUT what happens is that when I reboot my server, and then do "ls -l /dev/md*" there is no listing at all for any RAID devices. I actually have to run the assemble command on command line and that is when I see listings for RAID devices under /dev. What am I missing?

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CentOS 5 :: Software RAID Auto Sensing Auto Rebuild Possible?

Jul 23, 2010

I recently installed a server with Software RAID. I tested by powering it down, unplugging one drive and powering it up. Magically, it worked!I found out later that I have to manually add individual devices like md1 to sda2 md2 to sda4. I got all of them added and rebuilt but my question is: Is there a way to make it so that if I "removed" a drive and put it back, the system will senses the new drive and rebuilds based on some internal table?

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Ubuntu Installation :: Dual Boot - Win 7 And 10.10 On Raid 0 - No Raid Detect

Nov 26, 2010

I have installed Ubuntu on my m1530 since 8.04 and currently dual boot Win7 and 10.10. I would like to dual boot on my PC, but I have run into a problem. I am not a pro at Ubuntu, but this problem I can not solve by reading forums like I have in the past.

I realize this is a common problem, but I have noticed people having success.

I have a M4A87TD EVO MB with two Seagate drives in Raid 0. (The raid controller is a SB850 on that MB) I use the raid utility to create the raid drive that Windows7x64 uses. I have 2 partitions and 1 unused space. Partition 1 is Windows, partition 2 is for media, and the remaining unused space is for Ubuntu.

I am running ubuntu-10.10-desktop-amd64 off a Cruzer 16GB flash drive that was installed via Universal-USB-Installer-1.8.1.4.

My problem like so many others is that when I load into Ubuntu, gparted detects two separate hard drives instead of the raid. I read that this is because kpartx is not installed on 10.10. I then went in LiveCD mode and downloaded kpartx from Synaptic Manager. Gparted still reported two drives. I opened terminal and run a few commands with kpartx. I received an error. (Forgive me I didn't write it down, but I believe it said something about a communication error. I will try again later and see.)

Currently I am reflashing the Cruzer with a persistence of 4GB. I am not familiar with this process, but I understand that my LiveCD boot will save information I download to it. I decided to try this method because I was going to install kpartx and reboot to see if this made a difference.

I am looking for any suggestions on a different method or perhaps someone to tell me that the raid controller or some hardware isn't supported. I did install ubuntu-10.10-alternate-amd64 on my flash drive, but fail to get past detecting my CD-ROM drive since it's not plugged in. If this method is viable, I will plug it in. I also watched the ..... video were a guy creates Raid 0 with the alternated CD, but it wasn't a dual boot and didn't use a raid controller from a MB.

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Ubuntu Installation :: Dual Boot SSD Non Raid - 1 Terabyte Raid 1 Storage "No Block Device Found"?

Sep 15, 2010

It's been a real battle, but I am getting close.I won't go into all the details of the fight that I have had, but I've almost made it to the finish line. Here is the set up. ASUS Z8PE-D18 mother board 2 CPU, 8 Gig Ram. I recently added an OCZ Agility SSD, defined a raid 1 virtual disk on the 1 terabyte WD HDD drives, which will holds all of my user data, the SSD is for executables.The bios is set to AHCI. Windows 7 installed fine, recognizes the raid VD just fine.

I installed Ubuntu 10.04 by first booting into try and mode, then opening a terminal and issuing a "sudo dmraid -ay" command. Then performing the install. I told it to install the raid components, and told it to let me specify the partitions manually. When setting up the partitions, I told it to use the free space I set aside on the SSD from the Windows 7 install as ext4 and to mount root there. Ubuntu installed just fine, grub2 comes up just fine, and Windows 7 boots with out a hitch, recognizing the mirrored partition as I indicated previously. When I tell grub to boot linux however, it pauses and I get the "no block devices found" message. It will then boot, but it does not recognize the raid array. After Ubuntu starts up I can run "dmraid -ay" and it recognizes the raid array, but shows the two component disks of the raid array as well. It will not allow the component disks to be mounted, but they show up which is annoying. (I can live with that if I have to)

I have fixed a similar problem before by setting up a dmraid script in /etc/initramfs-tools/scripts/local-top ... following the instructions found at the bottom of this blog:[URL].. To recap: My problem is that after grub2 fires up Ubuntu 10.04.1 LTS (Lucid Lynx), it pauses, and I get "no block devices found" It then boots but does not recognize the raid array untill I manually run "dmraid -ay". I've hunted around for what to do but I have not found anything. It may be some timing issue or something, but I am so tired of beating my head against this wall.

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Dec 4, 2010

I've created a soft raid w/ 2x 1TB drives by using Disk Utility. (used for mythtv storage, not system, swap or anything else)

If I start the raid array in the Disk Utility mount and everything works as it should, but on reboot the raid array isn't started so I have to go into Disk Utility, start it, then run the mount.

How can I get it to start automatically?

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Mar 4, 2010

Recently my boot time went from barely 2 minutes to more than 10.it goes to text from the splash logo and a line shows :"running dkms auto installation service for kernel 2.6.28-18-generic".And then each 3 or 4 minutes it shows a driver (for a total of 3) : nvidia, vboxdrv and other one related to vbox.I've scanned through syslog but I can't find anything related to this issue.

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Aug 25, 2010

I have the issue of getting the Kubuntu getting booted first if I do not select manually in 7 sec. how to make that auto selection to XP so that, I can leave the computer and let it select Windows.

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Ubuntu Installation :: 9.10 64, GRUB Can't Boot XP In RAID-1

Jan 12, 2010

I'm a long time windows user and it-tech but I have long felt that my geek-levels were too low so I installed Ubuntu last week (9.10 x64). Hopefully I can make it my primary OS. I have two 80GB drives in RAID-1 from my nforce raid controller, nforce 570 chipset. Then a 320 GB drive where I placed ubuntu and it's also where grub placed itself. And also a 1TB drive.

When grub tries to boot XP I get the error message: "error: invalid signature" I checked the forum as much as I could and tried a few things, but no change.

Drives sdc and sdd are the two drives in raid, they are matched exactly, but detected as different here. I really think they should be seen as one drive.

how I can make grub work as it should?

Also, if/when I need to make changes to grub, do I really have to use the live CD?

Code:
============================= Boot Info Summary: ==============================
=> Grub 1.97 is installed in the MBR of /dev/sda and looks on the same drive
in partition #1 for /boot/grub.
=> Windows is installed in the MBR of /dev/sdb
=> Windows is installed in the MBR of /dev/sdc

[Code].....

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Sep 15, 2010

I am using the 10.04.1 x64 Kubuntu live CD to install Kubuntu on my FakeRAID 0 array, I tell it not to install grub as i know it is still currently broken. the install goes flawlessly. However on first boot using my live grub CD unless i tell my computer to point to the CD it will hang (which it is told to boot from CD first so i'm not sure why it does.) When i tell it to boot to Linux, it will not boot saying the kernel is missing files (to much to sadly list, all i do not understand) then offers me a terminal to input "help" into for a list of Linux commands. Windows 7 pro x64 works just fine CD was downloaded VIA P2P if it matters

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Apr 17, 2011

I have (3) 60GB SSD. I want to use (2) in RAID 0 for Ubuntu and (1) alone for Windows 7.

What is the best way to get about this? I know how to create the RAID 0 array with the (2) disks and install Ubuntu on it. But how do I get the RAID array with Linux on it to dual boot with Windows 7?

Linux - RAID 0 (2) SSDs
Windows 7 - (1) SSD

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Aug 20, 2011

I have a Asus P5Q-E with SATA Raid (fake Raid ?) with 2 250Gb disks on Raid 0 and have Windows 7 installed. Freed some space and want to install Ubuntu 11.04 alongside Win7. Install choosing the "alongside" option. Installed...reboot...grub rescue (error no such device). Win7 disk recovery and got access to Win7 again. Where is Ubuntu ? Nowhere... the free space continues free (not partitioned) and found no evidence of ubuntu install. Ok...second try with "something else" option, created /boot /swap and / partitions and installed grub on /boot partition (this time I want to use windows boot to choose...and if it fails the instalation again, at least I got Windows). Installed...reboot...grub rescue.

Again, the free space wasn't partitioned and the installer spend some time doing something but there is no evidence of ubuntu install. Also grub seems to be installed on first disk (even when I choose /boot as device bootloader installation) - I've used EasyBCD to create an entry on win bootloader and when I choose that got grub> (not grub rescue>).

Can Ubuntu be installed on such conditions ?

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Mar 21, 2010

Is it humanly possible to have a dual boot system and have it in RAID 0

I have three Hard drives.....
The three drives that I have are250GB IDE
1TB Sata
1TB Sata

And I edit . produce a lot of music/videos

What I am looking to do it have my 250Gb IDE drive as my Operating system (partitioned in two or something, one for Windows Another for Ubuntu)

And I would like when I am on either Operating System (ubuntu/windows_7)
its see's ,my computer as having a 2TB HDD (setting the two 1TB HDD's in RAID 0 )

So in Laymans... 250GB for OS's and 2TB (2 x 1TB HDD) as DATA drives

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Mar 24, 2010

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Dec 2, 2010

I upgraded my Dell T3500 from lucid64 to maverick64. The system cannot boot the current image becuase it gives up waiting for root device. it gives something like:

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Mar 20, 2011

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Is this going to be worth the effort? Obviously I'm trying to boost performance in boot and run times, but with Grub on a single drive, will I see much gain?

Does this sound like the right methodology (softRAID)? I only have two spare PCI slot's, which don't seem like they would be condusive to hardware raid, but someone who knows more could convince me otherwise.

[Code]...

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Ubuntu Installation :: 10.04->11.04:often Get Degraded Raid Error At Boot?

Sep 1, 2011

I recently upgraded from 10.04 to 11.04 and I now often get boot messages about a degraded raid.

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Jan 25, 2010

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May 6, 2010

I'm trying to install Lucid server (64 bit) and I'm having trouble getting it to boot from software RAID. The hardware is an old Gateway E-4610D (1.86GHz Core2 Duo, 2GB RAM, 2 500GB HDs).

If I install on a single HD, it works fine, but if I set up RAID1 as described here, the install completes fine, but on reboot this is what I get:

Code:
mount: mounting /dev/disk/by-uuid/***uuid snipped*** on /root failed: Invalid argument
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory

[Code].....

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Sep 3, 2010

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Oct 21, 2010

I originally wanted to dual install 10.10 64 Ubuntu with Windows 7 64 RAID 1 HP PC, but RAID got corrupted and I could find no fix online except using fakeraid unsupported software. The whole thing blew my muind. I gave up after 4 or so reinstalls of windows 7 to fix RAID. So I decided to install a dual boot 10.10 Ubuntu i86 with my old WinXP i86. I kept getting these errors at boot up: unknown filesystem, file not found, out of disk, no such partion and so on. I tried just about every grub reinstall I could find, including article here: "Recovering Ubuntu after Installing Windows."

After a number of tries my friend installed Ubuntu successfully, but then when I installed windows xp I am stuck here, again. I did do the Reload grub tutorials again as well. I may just give up on WinXP and have my friend reinstall Ubuntu for me.

[Code]...

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Mar 19, 2011

I am trying to install Ubuntu Server 10.10 on a computer with 5x 1.5 TB HDDs. I went through the process of partitioning the five hard drives into three partitions each:

sd*0 is a 300MB partition for /boot, RAID1, 2 active, 3 spare
sd*1 is a 500MB partition for swap, RAID1, 2 active, 3 spare
sd*2 is a 1.5TB partition for /, RAID5+LVM, 5 active, 0 spare.
md0 is the raid1 on sd*0
md1 is the raid1 on sd*1
md2 is the raid2 on sd*2

During the install, everything seemed to work fine with the formatter, but the installation ended in error. I booted into rescue mode and found that though all the drives were U (in /proc/mdstat), it was resyncing. I let this run (overnight) and the next day, jumped back in and installed the OS successfully.

However, after installing GRUB, when the installation process asked me to reboot, the system came back up with a blank screen (blank, save for a blinking cursor) and didn't move from there. I am thinking that the problem is GRUB, since I can boot into the main LVM partition via the rescue option on the install cd. Here's what bugs me:

[Code]....

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Jun 2, 2011

I am currently with Wubi 10.04 under Vista and my Dell XPS 630i has a 1 TB Nvidia RAID controller.First image (Option A) suggests /dev/sda as device for boot loader installation, while second image (Option B) suggests /dev/mapper/nvidia_bcidhdja.I think that the way of keeping the RAID would be using Option B as the device for boot loader installation. Would Option A break the RAID instead?

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