Fedora :: Correctly Remove A RAID Component?
Dec 4, 2010
I had a RAID1 array with two disks. I wanted to remove one of the disk and replace it by a new one. I first expanded the array from 2 to 3 components and let RAID rebuild completely. When this was done I used Gnome disk utility (palimpsest) to remove the component on the disk I want to get rid of. It looks like palimpsest did mess up somewhere because the array is no displaying as degraded. How can I get rid of the "removed" entry (was /dev/sdc1) in the RAID array (and hopefully have it come in Running state)?
#/sbin/mdadm --detail
Raid Level : raid1
Array Size : 732570841 (698.63 GiB 750.15 GB)
[code].....
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Dec 22, 2010
i have harddrive on which raid 5 is configure and no file system is configured.so i want to access the data on auto raid component harddisk.could any one telme how to access auto raid component hard drive.when im connectingto my laptop its not opening.when i check in disk analyzer its showing auto raid component harddrive.please helpme to access data inside the raid drive.
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Apr 17, 2011
I would like to mount a disc that was previously used in the Intel Software Matrix RAID array (fake-raid). If I try to mount it I get:
mount: /dev/sdd1 already mounted or tempb busy
I think my dmraid is refusing to mount it beause of some RAID "flag". I would like to get rid of it, but unfortunately I cant do that on my system (theres no such RAID):
[root@ox mnt]# dmraid -r /dev/sdd
ERROR: isw: Could not find disk /dev/sdd in the metadata
no raid disks and with names: "/dev/sdd"
There are several posts recommending to uninstall dmraid completely from the system. Isnt there smarter solution in removing such a flag?
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Jun 6, 2011
I have an ubuntu 10.04 machine that I use primarily as a file server. I have a RAID5 array built with mdadm from 3 component disks that worked properly until a recent upgrade (I'm not sure exactly what broke it though). The array is /dev/md0 and is set to mount at /var/media on bootup. *Now*, when the system cold boots it hangs partway through the bootup sequence and throws the following error:
The disk drive for /var/media is not ready yet Press S to skip ... Once I "S"kip this manually, I can see that LOWER in the boot sequence mdadm gets called and assembles the drive, and once fully booted into the system I can then simply do a "mount -a" and the array mounts properly. SO... my gut feeling is that some portion of one of the upgrades changed the order in which things are called, and now the "mdadm assemble" is not triggered until AFTER the system tries to mount the drives. My problem is that I don't know the stuff that controls the boot sequence well enough to dig in the right place.
As a workaround I can remove that entry from /etc/fstab, but then (of course) the system won't auto-mount the array. It's better than the boot process completely hanging because as least THIS I can fix remotely, but I'd really like to know
1) why this broke in an upgrade and is it a known problem?
2) how to get it back to where it auto-assembles and then auto-mounts the array on bootup.
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Nov 26, 2015
I'm having issues with a RAID array.
Setup is like this:
Debian Jessie, 2 hard disks, each having 2 partitions: /dev/sda1, /dev/sda2, /dev/sdb1, /dev/sdb2. Partitions were paired during installation, so they form /dev/md0 and /dev/md1. /dev/md0 is the root (/) partition, /dev/md1 is for /home.
At the end of the install process, I chose /dev/sda1 to carry Grub. And I think this is where I screwed things up.
After removing one of the hard drives, there was no boot capability. So, I installed Grub on /dev/sdb, too.
Now it displays the boot menu but cannot find the kernel. This is where I got lost in the process.
Do I need to reinstall the OS or is there a way to fix it? I suppose I have to edit Grub.
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Apr 16, 2011
I am trying to pinpoint which component of my machine is dying. Here's what I get when I try to install Windows 7: The specified I/O operation on DeviceHarddisk0DRO was not completed before the time-out period. I have tried changing hard drives, swapping memories (running them in single and parallel), changing BIOS settings, etc. When I run a live CD with Fedora, it will come up fine but when I try to install it runs like a snail. It will never complete.
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Jun 24, 2009
I've tried to install Fedora 11, both 32 and 64 on my main machine.It could not install as it stops on the first install window. I've already filed a bug but really haven't seen any feed back yet.The bug has something to do with Anaconda and the Raid array but I really can't tell.
I have an Intel Board (see signature). I am running intel raid software under W7 currently.It works fine. But, I'm wondering, when I attempt to install F!!, is my current raid set-up causing problems? Do I need to get rid of the intel raid software and use a Fedor/Linux raid program to manage the raid array??
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Jan 24, 2011
I'm going a little bit crazy. I can't seem to remove my RAID 1 arrays. Any suggestions? I don't need to save data. The drives are empty. I'm upgrading to 4 2TB drives.Running Lucid Lynx server
Code:
jessica@nas:~$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md2 : active raid1 sdb1[1]
976759936 blocks [2/1] [_U]
md0 : active raid1 sdd1[0]
[Code]...
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Dec 16, 2010
I am trying to build a storage server using software RAID. After getting writing RAID information to what I thought was the drives, I realized the configuration was not going to work. Since that time I have modified the RAID configuration more than once plus this is a project that was started a few months back. Between the time delays and currently written configuration, things are a confusing mess.
What I would like to do is wipe out all software RAID and start all over again. The problem is that I am unable to figure out how to get rid of it. I used DBAN to wipe out all four of my 1 TB drives which took a while. But still, the RAID configuration pulls up when I try to do a new install. Where is the RAID configuration data stored at if not on the HD? How can I scrub that information off so I can start all over again?
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Apr 5, 2011
I bought a disk to a friend that used it in a raid array, using the entire disk for the raid usage. To put that disk on service, i used dd-rescue to copy my old disk entirely, and managed to grow and setup a the partition table without losing any data. My last step was to create a RAID between my entire old disk, with a single partition and a partition of the same size on my new disk. I ran into some problems, but i manage to somehow fix it imperfectly, but now this setup is working properly. The problems (and imperfection) came from an issue it did not suspected : at some point, the original RAID superblock of the new disk, living in /dev/sda, resisted to dd-rescue, and so it is scanned by mdadm that tries, obviously unsuccessfully, to use it.
Partition layout :
Code:
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
[code]....
this setup is working properly besides this raid5 declared on sda, so that is shows up here and there. Since it is using the same device name that my other, proper raid setup, i don't know how to deactivate it since mdadm uses the /dev/mdx name to identify arrays.
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Mar 30, 2010
i want to remove the raid 1 arrays on our server centos and use standalone drive
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Nov 8, 2010
I am currently running CentOS 5.5 on a software raid 1 setup.
I would like to remove the raid configuration and have it run without raid.
How would one go ahead and do this?
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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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Jun 21, 2011
Overnight, I upgraded from KDE 4.5.1 to 4.6.3 and had a rude awakening this morning when I found that KDE had managed to, once again, break the Task Manager "force rows" behavior which had been fixed a few major releases ago. I found this lovely patch that had been applied:
[URL]
And thus broken the functionality, and I want to recompile that particular plasmoid with the patch removed. However, I am completely unfamiliar with CMake or building anything at all, for that matter. All my programming is done in PHP which means I'm pretty much completely lost. I'm in the midst of pulling down the kde-workspace tree with git, and already downloaded and modified a separate copy of the file in question to look the way it is supposed to. I don't want to rebuild all of KDE, just the one module.
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Jan 26, 2010
I had to reload my openSuSE 11.1 and reloaded KDE 4.3.4 from KDE Repositories and did an unconditional update on KDE Core and Community to ensure I got all the current versions back.
I am now having an issue with at least two plasmoids that is regularly used. When I attempt to add them to the desktop, I get the message "component not found". This happens to at least these two, yasp and yawp for system status and weather. It may happen to others, I haven't tried.
They are both loaded and both are present in /usr/share/kde4/services. I removed them using YaST, then rebooted, then re-added them, then rebooted and still get the same result, component not found.
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Apr 11, 2010
how to cross-reference it but searching on 'Could not initialize the browser's security component' will find it. Then look at the last 3 entries. Me and two other users have been unable to use Thunderbird since yesterday's update.
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Feb 22, 2011
Long time Ubuntu user, but it's been a couple years.
My friend had an old Dell Dimension E251 lying around and I said I'd help him turn it into a media center of sorts. The old 52" HDTV he wants to plug it into has a broken vga input and no HDMI, so our only real option is component or (heaven forbid) S-video. He can afford to get a new video card if it's relatively cheap, and I'm not really sure what would be our best option. Does anyone have a card in mind that would be relatively hassle free? I considered getting a card with HDMI output and using one of those HDMI to component converters, but my research suggests that that won't work. Are there old cards with component out, or is there a card that makes this relatively easy to achieve?
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Mar 3, 2011
The web server component of Apache isn't actually called "Apache" right? It is called something else? I didn't realize there were so many parts. Also, is there a good newbie introduction to how to configure it for a basic web server?
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Mar 20, 2011
Today I've setup Debian Squeeze for netbooting with tftp-hpa and isc-dhcp-server. I have also downloaded-only all gnome packages (apt-get install -d gnome) and setup a small apt repository for base system and gnome on the same pc (server).However, my small apt repository is missing debian installer components like libc-udeb, dmsetup-udeb, ppp-modules-udeb, etc. The question is: Where to obtain those packages and their dependencies? I cannot find or download them with apt-get nor aptitude.
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Jul 2, 2010
Does anyone know which component of the GNOME desktop is responsible for interpreting the media buttons on my keyboard? I would like to run this component in KDE, because KDE doesn't handle the media buttons correctly. I am not talking about the icon in the system tray.
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Aug 6, 2011
Ubuntu shows the following error message when I try to launch Firefox "Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features." No other program including Google Chrome has this problem.
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May 29, 2009
I am using a NVIDIA 9400GT video card on the latest Ubuntu. I believe the video card is a DVI-I port because it has the correct pin settings - [URL] I am using this DVI to Component adapter - [URL] The adapter is marked with Y Pb Pr above the RCA jacks. So it is analog and the vido card port is DVI-I ... all is correct ...
I am connecting to a DYNEX DX-LCD22-09 TV with HDTV component cables. The TV accepts both YCbCr and YPbPr signals. When I first boot the linux box there is no signal. Then right before it auto logs in I get a picture that is all green on the right side, black everywhere else and the TV displays it is at 1280x720 60hz. Finally the screen goes blank when the machine logs in - no signal! I have tried all combination of the adapter settings and have looked over the component input and output cables many times to insure I have it setup correctly.
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Oct 6, 2010
I am trying to install Android development plugin to Eclipse, but it has a problem with version (i think). I installed my eclipse using yum.
Now, I want to try uninstalling eclipse and use the version from the eclipse.org website instead to avoid this problem. I run rpm and got the folllowing mesg.
Code:
How do I uninstall all the eclipse component and re-install it fresh?
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Aug 2, 2011
After upgrading to KDE4.7 I would get the error message, "A KDE text-editor component could not be found. Please check your KDE installation.", when I clicked on text files. The all knowing Google provided no answer so I am leaving my solution here in case others are as unfortunate.
For some reason kdelibs3-32bit is pulled in when I upgraded to kde 4.7, removing it fixed the problem.
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Jun 28, 2011
To remove pendrive when I click the 'safely remove' tab instead of getting removed from the desktop it reappears again. This problem is there in fedora 14
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Apr 6, 2011
after logging into my ubuntu 10.10 netbook edition, I see that my gnome desktop just hangs on the background desktop screen. when i check my .xsessions i see the following errors listed below.how to fix these error messages?
gnome-session[1583]: WARNING: Unable to find provider 'mutter' of required component 'windowmanager'
gnome-session[1583]: WARNING: Unable to find provider '''' of required component 'panel'
GNOME_KEYRING_CONTROL=/tmp/keyring-ObEeS8
[code]....
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Dec 15, 2010
Anyone else seeing this? I do 'safely remove' to remove USB flash drive. disappears. Five seconds (or less) later, it reappears. The second time I do 'safely remove', it stays gone.
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Jan 21, 2011
Ah, this time you've really screwed it up without covering you traces: F14 does not interpret correctly my (possibly botched up) ACPI tables and HANGS!!! With acpi=off I have to press the power button to switch my desktop off and that is really ANNOYING. Surely the Fedora engineers could have done a better job with this one.
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Mar 3, 2010
About two days ago, Yum started complaining about having a corrupt RPM db, so I hit google and looked up the procedures for rebuilding the DB, and I think I broke it more than fixed it. Now, when I issue a
Code:
root@BLACKHEARTED ~# yum -y update
Traceback (most recent call last):
File "/usr/bin/yum", line 29, in <module>
yummain.user_main(sys.argv[1:], exit_code=True)
[code]....
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Jun 14, 2010
When I boot my computer, I can see dvd-rw drive detected correctly, though 9 times out of 10 it does not get detected by OS - drive's icon is not present in nautilus hence I cannot access any cd or dvd. Although when I restart a computer and try to boot from cd or dvd - it works perfectly, then after coming back to the os the cd/dvd won't be accessible. I a have Fedora 13 installed from the DVD ISO.
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