Ubuntu :: Raid 5 Won't Start - How To Make It Work
Jan 6, 2011
I was running Ubuntu 9.10 with 3 - 1.5TB drives in a software Raid 5 array. The OS is installed to a separate drive. I decided to format the OS drive and install Ubuntu 10.10, but having done that I can no longer get my Raid array to start. When I am in the Disk Utility and hit the "Start RAID Array" button I get a message saying that there are not enough components to start the Raid array, even though the 3 raid drives show up within the Disk Utility.
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May 4, 2011
I have a mysql database and i use it with apache for my webpages. And I guess it dosen't start when the computer starts so I have to manually start it with "sudo /etc/init.d/mysql start" This returns fail so i went to '/var/run/mysqld/' and the folder was empty. I don't know if this is the problem or not. How can I fix this?
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Sep 2, 2010
I'm configuring a new Centos 5.5 server in replacement of an old W2K server.The topology of our network is simple : one file/dhcp/dns relay server and workstations (PC's and some MAC's) plus network printers and scanners.All the workstations have dynamic IP addresses (easier because a lot of 'dynamic' changes : new persons with their own laptop, ...) and the server and printers/scanners have fixed IP addresses.I edited the dhcpd.conf (see here underneath), I have the file dhcpd.leases but it doesn't start !
DHCPD.CONF
ddns-update-style interim;
ignore client-updates;
[code].....
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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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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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Jul 27, 2010
this explanation could take a paragraph or two. I have 7 hard drives in my system. One is a 250GB PATA I use for the Ubuntu install, 3 are 1.5TB SATA Seagates and the other 3 are 1TB SATA Seagates. I have had to replace 4 drives (one of them is the same drive twice) in order to get 6 that actually work well. That's a 40% failure rate. Most of the failed within a week or so of putting them in.
Through all of that I have learned a few things and now have them configured as follows. I have all six of them Raid5 with 1TB partitions. And then the 3 extra 500GB partitions I put as Raid 5 also. Seems weird, but it saves 1TB of space instead of having 3 1.5TB RAID5 and 3 1TB RAID5.I then use LVM to make it all one big 6TB drive. Yummy, lots of space.
Here's the problem I have had the last couple of times I restart the computer the 6X1TB RAID does not start up, or I should say it has all the drives as spares (the 3X500GB RAID starts fine). I have to use --force to get the raid to load, and all 6 load fine. I believe it says something about having to write something to two of the drives (I believe it is something about the superblock) to make them the same. I'm sorry I did not catch the message.Is that enough information for someone to tell me why it does this? It's done it twice now, when I reboot the computer.
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Jun 26, 2011
Ubuntu Server 11.04 i386. I've used linux on and off for years but only in small doses, so I'm really just at newbie level. I was running an Openfiler NAS, but decided to give Ubuntu+Webmin a try. And up 'til now I've been happy with progress. I have set up a RAID-6 array using 5 x 1TB SATA drives. I've ensured that the array is in a "clean" state, and now I want to do some failure testing. The problem occurs when I remove one of the drives in the array. I shutdown, remove a drive, then boot up. The array wont start at all, and comes up with this error during boot:
Quote:
the disk drive for /mnt/raidvol1 is not ready yet or not present
Continue to wait; or Press S to skip mounting or M for manual recovery
If I wait, nothing happens. Obviously the RAID array should start in degraded mode, but it fails to mount at all. When I press "M" to go into manual recovery and type "mount -a" I get the response:
Quote:
mount: special device /dev/RAIDVG1/RAIDLV1 does not exist
I have set BOOT_DEGRADED=true in /etc/initramfs-tools/conf.d/mdadm without success. If I reconnect the disconnected drive, the array works fine, and is in a clean state.
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Dec 17, 2010
I have a server setup with software raid, I've used mdadm to create the mirror and it seems to be working just fine but it won't start by itself.
2 x 160GB SATA drives, each with a single partition
/dev/sdb1 and /dev/sdc1 respectively
Code:
/dev/md0:
Version : 0.90
Creation Time : Fri Dec 17 13:31:13 2010
Raid Level : raid1
[Code].....
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Mar 7, 2011
Short story: I have a problem with one of my services (mediatomb) - it requires an md RAID array to be mounted in order to start, because it uses files from it. $remote_fs is added by default to the "Required-Start" line of the init script, so I thought that this should be enough. However, the mediatomb service fails to start on boot, but starts just fine when I execute "service mediatomb start" later. The array is entered in /etc/fstab and is automatically mounted on boot.
Long story...
This is my file server (Ubuntu Server 10.10), which has a raid array created with mdadm (mounted on /z), and the root filesystem is located on an USB thumb drive. I've installed mediatomb, but I wanted to put its database files on the raid array instead of the root fs, so I've symlinked /var/lib/mediatomb (the default path) to /z/mediatomb on the array. This is because the mediatomb DB is supposed to be updated fairly often, so I didn't want it to stay on the flash drive.
Problem is, the mediatomb service can't start on boot - in /var/log/mediatomb.log, it says "2011-03-07 19:22:47 ERROR: /var/lib/mediatomb : 20 x No such file or directory". As I said, it works fine when manually started later...
This is the fstab entry for the raid array code...
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May 5, 2011
My system locked up while copying files last night. My RAID array will not start. I did verify my UUID's. (Lesson learned.) I do not understand a few things.1. Why do different drives show "active sync" on different drives? 2. Why does "Disk Utility" tell me the RAID is not running and when I try to assemble the RAID, mdadm returns: mdadm: device /dev/md0 already active - cannot assemble itWhen I try to start the RAID using "Disk Utility":
Code:
Error assembling array: mdadm exited with exit code 1: mdadm: cannot open device /dev/sdd1: Device or resource busy
mdadm: /dev/sdd1 has no superblock - assembly aborted
So, I examine sdd1:
Code:
sudo mdadm -E /dev/sdd1
[Code]...
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Mar 20, 2010
i cant find any threds in this forum how to make raid 5 on fedora core 10 how to make 1?
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Feb 17, 2011
how to make creative web cam working with ubuntu
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Apr 8, 2011
I can't get flash controls to work. If the video auto-plays, it starts just fine, if not, I'm out of luck. I've tried reinstalling flash through the software center. Even if it autoplays, I can't control volume or pause or anything. I'm at the mercy of whatever is already there.
Ubuntu Karmic 9.10 - all updated as of 1/2/2009
Firefox 3.5.6
On a Lenovo Thinkpad R400
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Aug 10, 2010
I have an HTPC that was giving me insane amount of problems after 3 months of good use.
1x 250gig Samsung Drive (OS Drive)
3x 1TB Western Digital Caviar Green (Raid-5)
In 9.10, the raid was working fine. I decided to fresh install Ubuntu 10.04 and I can't seem to start the raid array. In Disk Utility, the array shows up but when I try to start it I get the error "Not enough components to start the array"
I've tried to assemble the array using mdadm and the following:
mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdd1
This returns the following error mdadm: failed to create /dev/md0
I have no idea what to do now, and unfortunately I don't have any backups
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Jul 29, 2010
I'm having trouble getting compiz to work on my Laptop. It worked for a while and then I turned on Shift Switcher and a message popped up saying..."The new value for the button binding for the action Terminate in plugin Shift Switcher conflicts with the action Zoom Window of the Scale Addons plugin. Do you wish to disable Zoom Window in the Scale Addons plugin?" I was given the option of Set Terminate anyway, Don't set Terminate, and Disable Zoom Window. I clicked Don't set Terminate and ever since the only thing that works in compiz are the bindings in the general options. I've used synaptic to completely remove and then reinstall compiz but the problem persist. Something else weird, all of the changes I made are still there, even after complete removal, but they don't work?
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Oct 29, 2010
When I try to hibernate, the computer just goes to a blank, black screen and doesn't turn off. I have to hold the power button to get it to shut down, and when I turn it back on none of the programs running before hibernation have been saved.
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Feb 16, 2011
I just recently (about an hour ago) installed Ubuntu Netbook edition on my old laptop, and I was greeted with the message, that unity could not be run due to some sort of missing driver...fair enough, I was then greeted with the default Ubuntu desktop, I installed all my needed software (wine, google chrome) and installed the missing display drivers. I then rebooted the system, and once again I am stuck with the default desktop, and not the Unity interface. I checked the software center, and it says Unity IS in fact installed.. And yet I cannot make it appear. So now I ask you Ubuntu veterans. How do I make it work?
P.S. I wiped the system of windows, and the computer is an old HP Pavilion DV6000
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Apr 22, 2010
I've a database-server (IBM x3650 M2) with about 3 TB Data on SAN (Hitachi) with lvm top of softraid (RAID1) based on multipath (2 SAN-boxes in different buildings). After booting the server, multipath starts, but no md starts the mirror. The same configuration with SLES 10 works.
cat /proc/mdstat
Personalities : [raid1]
md13 : active raid1 dm-17[1] dm-14[0]
[code]....
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Jun 2, 2011
I have a Dell PowerEdge SC1425 with two SCSI-disks, that I have tried installing Debian Squeeze on. This machine has previously been running Lenny (with grub 1), and the upgrade was done by booting a live-cd, mounting the root partition and moving everything in / to /oldroot/, then booting the netinstall (from USB), selecting expert install and setting up everything (not formatting the partition).
Both disks have identical partition tables:
/dev/sda1 7 56196 de Dell Utility
/dev/sda2 8 250 1951897+ fd Linux raid autodetect
/dev/sda3 * 251 9726 76115970 fd Linux raid autodetect
/dev/sda1 and /dev/sdb1 contain a Dell Utility, that I have left in place.
/dev/sda2 and /dev/sdb2 are members of a Raid-1 for swap.
/dev/sda3 and /dev/sdb3 are members of a Raid-1 for / formatted with reiserfs.
After installation, grub loads, but fails with the following message:
GRUB loading.
Welcome to GRUB!
error: no such disk.
Entering rescue mode...
grub rescue>
Doing "ls" shows:
(md0) (hd0) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1)
I can do the following to get grub to boot:
set root=(hd0,3)
set prefix=(hd0,3)/boot/grub
insmod normal
normal
This will bring me to the grub menu, and the system boots.
It appears that grub has only found md0, which I believe is the swap partition, because ls (md0)/ returns error: unknown filesystem. I have installed grub to both sda, sdb and md1, and tried dpkg-reconfigure grub-pc and dpkg-reconfigure mdadm, as well as update-grub.
I manually added (md1) /dev/md1
to /boot/grub/device.map, but still no result.
I have run the boot_info_script.sh, but unfortunately I cannot attach the RESULTS.txt, because the forum aparently does not allow the txt-extension. Instead I have placed it here: [URL]. I am tempted to go back to grub-legacy, but it seems I am quite close to getting the system working with grub2.
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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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Jul 2, 2011
I'm trying to put two identical disks in Raid 1 for a homeserver. I got Ubuntu 11.04 server 32 bits on a USB stick. Installated till partition menu. Now I get the question how I want to partition my disks. I choose manual, and two times entire disk, one for both. It looks like this:
(iPhone quality)
I go to configure software Raid, and select Raid 1, 2 active disks, 0 spare disks, and get this:
I can't choose the other 2TB partition. I think I have to configure Raid three times, one for each partition. Not?
I click the missing 2TB partition, and get this:
But I think there's no RAID device at all, I see this again when I go to Configure Software Raid, en try to delete a RAID device:
How do I get Disk 1 and Disk 2 together in Raid 1? [URL]
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Jul 31, 2010
I have a strange issue with my RAID5 array - it worked fine for a month, a couple days ago it didn't start on boot with mdadm reporting "Input/Output error" - I didn't panic restarted my computer, same error. Then opened a Disk utility and it reported State: Not running, partially assembled - don't know why, I've pressed Stop RAID Array and started it again, voila - it reported State: Running - I've checked components list and there was nothing wrong with it. So I run Check Array utility, waited almost 3 hours to finish it and it worked since than, till today's morning - I've started my computer, and here we go, same error.
See screenshots:
This is an initial state just after computer startup:
This is after I stop and start RAID5:
This is a components list:
I can see nothing wrong there yet not sure why mdadm fails on boot. I do not really like the windows solution I guess, when I check my array again, it will work fine again, but it then can fail in the same way without known reason.
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Feb 1, 2010
I started out with a RAID 0 of 3x 500GB drives. Partitioned to a 200gb Windows 7 install (plus the 100mb partition), a 50gb partition I was going to use for Ubuntu 9.10, and the around 1081GB NTFS storage partition. It wouldn't work, I tried a bunch of things, EasyBCD, ect, rebuilding grub, and everything else... wouldn't work for me. So I gave up, backed up everything and then rebuilt my RAID into to "separate" drives so that I could just change the booting drive depending on the flavour of frustration I was looking for at the time. Installed W7 back, installed Ub9.10 back. Windows loaded through it's drive fine. Ubuntu will not freaking load. So I ran a script I found laying around on one of the many.... MANY posts I read and will attach the outcome.
[Cide]...
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Aug 2, 2010
I ve got a SATA HDD which I use for storage connected to a (now quite old) RAID PCI card (HighPoint Rocket RAID 1520). Ive added another (blank) HDD, same brand and size to the PCI card. Ubuntu (10.04) can see both hard drives and access data. Id like to mirror (raid 1?) these HDDs. Looking around this forum Ive noticed quite a few people mentioning FakeRAID. Turns out that's not quite the same as software RAID. Given how cheap the 1520 was, I suspect it's FakeRAID rather than Hardware. Perhaps someone can confirm? Given Ubuntu can see both HDDs, would this mean it ll have the correct drivers to work with a hardware/fake raid? A common recommendation is to use mdadm to create a software RAID. How does this work for partitions accessed from multiple Operating Systems including Windows XP?
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Jan 14, 2011
I just installed Squeeze_di_rc1, whit gnome, when i insert any usb stick i recive how can i solve it?At the same times i tried to format in fat 16 with gparted but the result is the same.
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Jun 2, 2010
Which RAID controllers work with Debian 5? Is there a list somewhere?
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Jun 12, 2010
I bought a used server and it's in great working condition, but I've got a 2-part problem with the onboard raid controller. I don't have or use RAID and want to figure out how to stop or work around the onboard SATA raid controller. First some motherboard specs.: Arima HDAMA 40-CMO120-A800 [URL]... The 4-port integrated Serial ATA Integrated SiliconImage Sil3114 raid controller is the problem.
Problem 1: When I plug in my SATA server hard drive loaded with Slackware 12.2 and linux kernel 2.6.30.4, the onboard raid controller recognizes the one drive and allows the OS to boot. Slackware gets stuck looking for a raid array and stops at this point -........
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Feb 12, 2010
I'm running Ubuntu 9.10, and using wbar as my dock, and when i boot up my computer and log-in I like to have my dock there instead of opening it. Is there a way to make it open automatically right when I log in?
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Sep 4, 2010
How do I make something start on boot? I remember there being a command.. nano something, can anyone tell me?
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Mar 3, 2011
I have just installed Debian 6.0 and it does not seem to recognize my Promise Tx4650 RAID controller.
I have created a dual boot with WinXP 64. Windows sees my two RAID one arrays correctly (as two logical drives).
In debian I see four physical drives in file browser.
I contacted Promise tech support and they said that the only Linux they support is SUSE, but they did send me some source code to compile.
This problem is complicated by my newness to Linux and Debian.
Here are some specific questions:
1] Is there any debian package that is known to support the Promise Tx4650?
2] Where can I see if my Tx4650 is recognized?
3] If I have to compile it into the kernel, where are the directions for how to do that?
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