Software :: Strange Cent OS 5 Behaviour On Failed Software Raid Device?

Oct 26, 2010

I've got a simple software RAID1 configuration (2x250gb disks) running on Centos 5 where one of the devices appears to have failed.Whilst the system is continuing to run, the ext3 filesystem on the raid device has been placed into read-only mode Is this normal behaviour? As one of the devices is still operational I can't see why this should have happened. Can anyone explain what may have caused the OS to do this?Output from /proc/mdstat is:-

Personalities : [raid1]
md1 : active raid1 sdb2[2](F) sda2[0]


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Ubuntu :: Rename Strange Behaviour After Upgrade To 10.10?

Oct 16, 2010

Today I upgraded from 10.04 to 10.10 and I notice that the rename function is different from before.
Now it select all the filename including the extension while before it select only the filename. How can I fix this problem? It's very uncomfortable rewrite the extension everytime or remove the extension from the selection.

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Ubuntu :: USB External Disk Strange Behaviour?

Jul 19, 2011

Whenever I remove my external Freeagent Go USB external harddrive my mouse and keyboard stops responding and all I can do after that is hard-reboot pressing the key on the cabinet.It happened when external harddrive was connected while a powercut, though drive works fine when ever I disconnect it mouse and keyboard stops functioning and I have to hard reboot machine again.

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Programming :: Sed Strange Behaviour With Line Including Backslash?

Jul 1, 2010

I have a small script that takes input from one file, and uses this input to do a find/replace (with sed) to make an executable snmp trap.The input file could look something like this :JOHBURG SOUTH AFRICAOSLO NORWAY..etcThe script takes the input from this file, and preserves all words in one line as a variable (so that the variables are "JOHBURG SOUTH AFRICA" and "OSLO NORWAY", instead of JOHBURG, SOUTH, AFRICA, OSLO, NORWAY.This is working ok (in the given example, I get two variables).sed is supposed to take this variable, and use it to substitute "HITME" with the new variable.

cat tutticodes | while read LINE


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Ubuntu Networking :: Added Some Loopback Ip's And Strange Behaviour Ensues?

Feb 7, 2010

I added the following lines to my /etc/rc.local file:

ifconfig lo:0 netmask
ifconfig lo:1 netmask


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OpenSUSE Hardware :: Synaptic Touchpad In 11.3 - Strange Behaviour With Dragging And Middle Click

Jul 19, 2010

One strange and little annoying issue I notice with my openSUSE 11.3 installation is my Synaptic touchpad behaves way too strange.... Dragging a window or icon - half way around - a click is generated (probably a middle click I guess) and I need to re-drag it again.... In the browser when I try to select a text - again by dragging - a middle click gets generated... The same happens when I use gvim in visual mode too - I end up pasting the code I had selected halfway because of the middle click....

Middle click can be generated only if I press both left and right click buttons - which I'm pretty sure I'm not.... I tried playing around with the touchpad settings but no good.... I'm not able to find anything related to the middle click on the settings application... My touchpad works fine in Ubuntu and was in 11.2 as well.... Yes it works fine in Xp too.

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General :: ATA Softreset Failed (device Not Ready), Now Slow RAID?

Sep 9, 2010

Recently did an apt update and upgrade to my CLI only Lenny server. Upon reboot I get an "ATA softreset failed (device not ready)" for all of my SATA drives. I noticed the upgrade changed the kernel to "Linux debian 2.6.26-2-amd64" (do have 64bit CPU).Once loaded to a command prompt I can assemble my raid 6 array with the command "mdadm --assemble /dev/sda to sdd" then mount it with mount -a. But transfers to the array areorribly slow ~1mbs.Upon reboot i get the same errors and have to assemble my array every time

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Server :: Convert RAID 1 To NON-RAID System In Cent OS 5 System?

Jan 6, 2010

Here is my system: I have dell poweredge 1950 PERC 6 with 300 GB raid system. It has two disks of each 300GB RAID mirrored system. I have few applications and data that reached around 280GB. As you know, poweredge 1950 we can have only two disk.

They are not mission critical. Hence, I wanted to remove the raid system and use as a non-raid system. By doing it, The applications and data can grow upto 600GB. I do not want to loose the data and setup. I am not so clear about RAID system and its conversion.

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Server :: Error Formatting Raid On Install With Cent Os5.5 And Ubuntu Sever 10.10?

Dec 7, 2010

i have a dell server. its a couple of years old and has a perc 4 raid controller in it. When i do an install it shows the drives configured in the raid 5 configuration. i select the disk and do an auto partition. It goes for about 10min then errors with "error formatting drive volgoup00 the error is serious occurred press enter to reboot" or something like that can remember all the words. It doesn't give any info about the error.

i get the same error on centOs 5.5 and Ubuntu server 10.10

There is a firmware update for the raid controller that i could apply but dell's site was not letting me download it yesterday. Other than that I am not sure what to do. I could try an older version of CentOS 5.4 but i figure someone might tell me how to fix this so i can run the newest version.

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Networking :: Strange Device Appeared In Ifconfig?

Jul 26, 2011

I am noticing the following output when running ifconfig:

[root@proxy log]# ifconfig -a
dev32758 Link encap:Ethernet HWaddr 00:xx:xx:xx:xx:xx


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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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Fedora X86/64bit :: Device-mapper - Reload Ioctl Failed - Invalid Argument Failed To Suspend LogVol00

Sep 10, 2009

I've read hundreds of threads on this problem but they seem to be intermittent and the resolution has been using a different kernel version.

I'm using the latest kernel but I still have this problem

Running Logical Volume Manager gui and attempting to extend the volume results in the same error.

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Ubuntu Servers :: Add Device To RAID?

Jan 16, 2010

I have three WD 1.5 GB harddrives. 2 of them already in a linear RAID also called Concatenated i think. (the same as JBOD). Can i add the third drive to the RAID without losing data? Update "Using mdadm software raid."

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Slackware :: Add Raid Device To Lilo?

Mar 14, 2010

I look after some small office where computers run ubuntu. Sometimes they phone me for help. For that reason, I decided to install ubuntu alongside with my slack.I seem to have problems with lilo configuration. Ubuntu is installed on software raid :

/boot = md0 (raid 1 of sda1+sdb1)
/ = md1 (raid 0 of sda2+sdb2)

That's lilo.conf:


append=" vt.default_uft8=0"
boot = /dev/sda
bitmap = /boot/slack.bmp



Fatal: open /vmlinuz-2.6.31-9-rt: No such file or directory

I can mount md0 without problems and the file name seems to be correct.

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General :: Get An Inactive RAID Device Working?

Mar 9, 2010

After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it.

* Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0.
# mount /opt
mount: wrong fs type, bad option, bad superblock on /dev/md_d0,


In /proc/partitions the last entry is md_d0 at least now, after reboot, when the device happens to be active again. (I'm not sure if it would be the same when it's inactive.)

Resolution: as Jimmy Hedman suggested, I took the output of mdadm --examine --scan:
ARRAY /dev/md0 level=raid1 num-devices=2 UUID=de8fbd92[...]

and added it in /etc/mdadm/mdadm.conf, which seems to have fixed the main problem. After changing /etc/fstab to use /dev/md0 again (instead of /dev/md_d0), the RAID device also gets automatically mounted!

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Ubuntu :: 10.10 - Automounting A Software RAID Device?

Dec 29, 2010

Just set up a home server with Ubuntu 10.10 desktop. I've set up a software RAID 1 device using System/Administration/Disk Utility which seems to work well. However when I reboot the machine and try and access the drive I get the error that 'authentication is required to start this raid device' and then I have to enter my password, after which all is good

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Hardware :: Mounting Raid Device After Reboot?

Mar 24, 2009

configure my raid devices so it can be started and mounted at start-up.

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Hardware :: System Device Name For A RAID Of SAS Drives?

Jun 29, 2010

For SATA drives in AHCI mode, the names are /dev/sdX, what about a RAID-0 or RAID-1 array of SAS drives? Are they the same?

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General :: Running Parted On RAID Device With LVM?

Mar 28, 2011

I have 2 identical disks, /dev/sda and /dev/sdb. I have a raid-2 configuration (/dev/md0) on /dev/sda3 and /dev/sdb3 partitions. On top of /dev/md0, I am running LVM. There are also partitions sda4 and sdb4 following sda3 and sdb3 respectively but the data in there are not important. What I want to do is delete the sda4 and sdb4 partitions and extend sda3 and sdb3 to the end of disk, and grow the md0 and the volume group of course *without* loss of data.

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Server :: RAID Device Resyncing Sporadically?

Jan 11, 2010

I have a desktop server set up with 3 x 1Tb disks set up in a number of partitions. Some are under RAID 1, others under RAID 5. eg:

md0 : active raid1 sdc2[2](S) sdb2[1] sda2[0]
513984 blocks [2/2] [UU]


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CentOS 5 :: Software RAID Device Not Recognised?

Aug 3, 2010

We ran out of space on our server hard drive, so I installed 2 x 1GB drives, set them up as a software RAID1 array, copied the contents of /home to it, mounted it as /home for testing. Everything OK, so I unmounted it,deleted the contents of the /home folders (don't worry, we're backed up), then remounted the array. Everything was fine until we rebooted.Now I can't access the array at all; during booting the error "mount: special device /dev/md1 does not exist" comes up twice, and manually trying toe same issue.The relevant line from fstab reads:/dev/md1 /home ext3 defaults 0 0.However, using webmin shows only md0, the RAID0 device on which the OSD was originally installed.There is no /dev/md1 device file.The mdadm.conf file reads as follows:

# mdadm.conf written out by anaconda
DEVICE partitions
ARRAY /dev/md0 level=raid0 num-devices=2 uuid=76fd4050:fb820568:c9bd3a59:ad3e70b0

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Software :: Failed SME Server 7.4 Raid 5

Mar 18, 2010

Just had my Raid 5 config on Sme server 7.4 crash due to a faulty drive, I have manage to setup a machine with ubuntu 9.04 and installed the drives in there original config (I haven't overwritten them). Ubuntu can see the raid config but for some reason I cannot mount it as it keeps asking for the filesystem which if I check says LVM2_member, anyone know how I could get it to mount?

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Fedora :: Not Able To Open Mdadm Raid-device / Sort It?

Dec 16, 2009

Got a little problem after the install of Fedora 12. First there was not problem in opening the raid-device, after i tryed to automount it with crypttab and fstab im not longer able to open it.
Here some outputs code...

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OpenSUSE Install :: DPT PM3334UW RAID Device Driver Available?

Aug 14, 2010

I am hoping there is somebody out there who might recall DPT hardware and be able to get it to work under Linux. DPT were bought up by Adaptec but made great SCSI cards. The PM3334UW is a true hardware raid device which I have been using in SOHO environment for the last 7 years or so with IBM Warp 4.52 (MCP2). The box, although legacy hardware is sound and I wish to keep it running but hoped to have an openSUSE option. Unfortunately I cannot find a driver for the SCSI RAID card. There are a good deal of posts concerning eata_dma.c and other eata based drivers as possibles but when I load the eata driver that is available when loading openSUSE 11.3 I am asked for parameters and I haven't a clue what these should be.

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Ubuntu Installation :: Mounting A NTFS Raid 0 Device?

Dec 27, 2010

let's say this system has 3 hard drives. Drive #1 and #2 are RAID 0 and Windows7 lives there. It is a hardware RAID, not software.

On Drive #3 Ubuntu has been installed using WUBI - it boots up and works okay - but it does not see the RAID array.

Do I just need a linux driver to be able to see & mount my "Windows" RAID0 array? Or is this even possible? Can anyone point me in the right direction?

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Ubuntu Servers :: LVM - RAID Device Not Present On Restart

Jan 29, 2011

I've decided to toy around with LVM and mdadm this weekend. I can get everything working, and all is well, until I restart. After that, I no longer have any /dev/md0 device, which during the auto mount process, causes an error. I've looked through several HOWTOs, as well as the LVM/mdadm man pages, and I believe I've tracked it down to mdadm's "assemble" that is needed (so that LVM can see the md0 device).

Not exactly sure how to go about having this occur during the boot process to ensure that the LVM mapped drive is available for when fstab is read. In case it helps this is a base install of 10.10 server 64. I have four drives, the first is used for the OS and is not in the RAID array (nor LVM). The second and third are RAID1 (/dev/md0) and there is a volume group associated with /dev/md0. The last is a LVM, but not RAID, and it has its own volume group.

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Ubuntu Servers :: Partition RAID Device (MD0) And Then Format It?

Feb 26, 2011

I am finally, and happily ditching Windows IIS, SQL Server, and ASP in favor of LAMP. Not only will I save a bunch of money on operating systems but I've found php and MySQL development to be much faster than their Microsoft counterparts.Currently I have two W2008 and two Ubuntu servers running and doing virtually parallel tasks. I want to can the W2008 machines but I am not 100% sure of my Ubuntu mirrors.Everything seems to be working fine. I've copied tons of data back and forth as a primitive test but sometimes things work fine for all the wrong reasons. Here's where I get confused.

Question 1:Do I need to partition the RAID device (MD0) and then format it?From my experience this is necessary to get the device to mount.

Question 2:In this case was it also necessary to format the individual drive partitions?

Question 3:If I do a daily cat /proc/mdstat is this all I need to do to check the drive status.

Question 4:Is there any other check I can do to assure that the mirrors are created, mounted, and operating correctly?

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Ubuntu :: Device Locations Switch In RAID Array

Mar 17, 2011

I am running Ubuntu 10.10 64. I have a RAID array consisting of two 1 TB HDD's, controlled by my on-board RAID controller. I have a dual-boot of Ubuntu 10.10 and Windows. The RAID array is mapped in /dev/mapper, and here is the output of sudo dmraid -ay

RAID set "pdc_dedfhcfdee" already active
RAID set "pdc_dedfhcfdee1" already active
RAID set "pdc_dedfhcfdee2" already active
RAID set "pdc_dedfhcfdee3" already active


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Ubuntu :: 10.10 Mdadm RAID - Moving Device Names ?

Mar 25, 2011

I'm having trouble with Ubuntu 10.10 and stable device names. When I installed Ubuntu, the root drive was the only one in the machine; it obviously got /dev/sda.

After the base installation, I installed three additional 2TB drives to make RAID-5 array. Ubuntu renamed the root drive to /dev/sdd. While annoying I lived with it.

After creating a single partition set to "Linux raid autodetect" on each drive, I created the RAID-5 array:


All was going well until a reboot. When rebooting Ubuntu decided to make the root drive /dev/sda this time and now mdadm --detail /dev/md0 reports:


How to fix the array and make the device names stable?

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Ubuntu Installation :: Installing With Raid 0 - Grub: No Such Device

Jun 29, 2011

I have a raid 0 setup with 2 x 1TB drives. I have an ASUS P8P67 LE motherboard and am using Interl RST for the Raid setup. I'm utterly ignorant of raid and therefore forgive any mistakes... I already had windows 7 installed and was attempting to dual boot ubuntu.

I installed Ubuntu from CD. The raid was picked up properly as only one drive by ubuntu. So it picked up the windows MBR and the main windows partition. I resized the main partition and used the "install ubuntu and windows 7 side by side" option. Installation went fine but once I restarted the PC I was welcomed by a grub rescue screen with the message: "error: no such device e196.....". Edit: I used the Windows 7 disc to repair the windows bootloader so I can now boot into Windows 7.

Before doing so I used gparted on the live cd to check the partitions on the drives. The only ones present were the MBR and windows one. So ubuntu seemingly didn't install... Although GRUB did... I was advised by someone on the ubuntu IRC chat to avoid trying to reinstall ubuntu at that point just in case there was an error in the partitioning process. I've since checked the state of the partitions from within windows and there's the MBR partiton, the windows partiton AND the partition that I created for ubuntu... 965MB of the partition that I created is listed as used space as well...

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