CentOS 5 Hardware :: 5.5 Ext4 Related Server Crash?
Aug 13, 2010
I have installed 2 extra 1.5TB drives on a stable Centos 5.5 system. They are set up with 2 unequal partitions on each - with 2 raid 1 arrays. The largest of the raid arrays is used as a new volgeoup with 2 unequal LVMs. The larger of the LVMs is around 1.3TB. I installed an ext4 filesystem (default parameters) on the larger LVM.I went to mount the LVM - the system hung. No keyboard or network response and no response to the soft shutdown button.It was the deadest I have ever seen it - and this system has been incredibly stable.
In the absence of any other suspects - I am tempted to blame ext4 - since I have never used it before - and since wikapeadia tells me ext4 isn't supposed to be in the 2.6.8 kernels...:
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I will do some more testing on this tomorrow to try to confirm my suspicions. I will try to repeat the crash - then try mounting it as ext3 to see if it behaves differently. Any other tests I should do?What is the status of ext4 in RHEL5.5. Has it been added to the 2.6.18 kernel by RH? Is this what is meant by a "back port"?
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Nov 21, 2010
My system just crashed and I had to reboot. The only interesting message I have found in the logs before the crash was :
Code:
2010-11-22 07:49:22 linux-lx7s smartd[2259] Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 114 to 115
2010-11-22 07:49:22 linux-lx7s smartd[2259] Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 61 to 60
2010-11-22 07:49:22 linux-lx7s smartd[2259] Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 39 to 40
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Sep 7, 2011
Summary of issue: EXT4 filesystem won't mount--with error = mount: unknown filesystem type 'ext4'. Is no ext4 in kernel the issue? Or is something corrupted?Really perplexed by this. I updated Centos 5.5 to 5.6 to get ext4 (5.6 is supposed to have full support of ext4). I built several arrays and put the ext4 filesystem on them. All went well until I tried to mount them. BTW, this array (below) is set up as a RAID6 using partition 1 of #8 2TB drives.Bear with me here; just trying to be complete and not waste your time.
Attempting to mount give this:[root]# mount -v /dev/md1 /asc/array1mount: unknown filesystem type 'ext4'Note: it does "fake" mount with ption (which apparently does everything except the system call):[root]# mount -f -v /dev/md1/dev/md1 on /asc/array1 type ext4 (rw,grpquota,usrquote)e2fsprogs:Package e2fsprogs-1.39-23.el5_5.1.x86_64 already installed and latest version (for Centos 5.6; CentOS 6x uses the 1.41...)
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Mar 30, 2011
I have some trouble with my hp workstation xw4400 with an ATI FireGL 3300 and the X-Server. There was no problem with the graphical install routine and the graphical boot works fine. But when the system changes into the login-screen, then it results in a black screen and a more or less frozen system.
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May 19, 2010
I had 5.4 machine. Upgraded to 5.5 today via yum upgrade. All went fine. Rebooted. Wanted to convert root partition to ext4 (I have three partitions: /boot, / and swap). All of them on software RAID 1 (root is /dev/md2). I did the following for converting
yum install e4fsprogs
tune2fs -O extents,uninit_bg,dir_index /dev/md2
nano /etc/fstab # I indicated here that my /dev/md2 is of ext4
[code]....
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Aug 29, 2010
Not having a good night. Typing away on some code and load & run my latest changes in chrome, mouse starts lagging and system slows right down, ok maybe it's a bug in chromeI close chrome, try to get to a terminal to kill processes, no luck, go away for a while and come back hoping it sorts itself out, still frozen so I reboot.Now I get a horrible crash almost immediately on boot with a bunch of cryptic numeric error codes then:
Begin: Running /scripts/local-bottom
...
mounting /dev on /root/dev failed: no such file or directory
[code]....
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Oct 18, 2010
Is there any command available inorder to read the server crash dump files?
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Apr 25, 2011
Client has a server running 5.5 (I think) and it they moved locations. This server is used in other locations (state) via ssh tunnel as well so they can all access files.
When attempting to boot up I get screenshot 1 (superblock errors)[url]
They supposedly have a backup on a hot swap scsi and I want to know how/if I can restore it using that backup if I cant fix the superblock boot/error issue.
I took some other screenshots:
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Jul 28, 2009
Sorry if this is in the wrong group but its a bit of an odd one but I think comes under Server Support.. I've set up both x11vnc and freenx in an attempt to eliminate either as a cause for this issue. The problem is that when I log in with either, I can get into the desktop and run things from the menus but when I make the System menu active - the session hangs and you have to killall for the freenx or vnc processes.
I was wondering if anyone might be able to help me investigate this and hopefully fix it as I'm not sure where to look given that both types of remote connection seem to have the same issue.
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Feb 1, 2011
We have had a hardisk crash in our RAID1 webhosting server running CentOS5 and Plesk. We first realized something was wrong when our main site didn't load but showed MySQL errors. We then found out that the system was in read-only state. Something that also happened the day before yesterday, but we could fix with a FSCK. Then the system worked well til around 18 hours later when it crashed with the same sympoms. So, we rebooted the server and wanted to do a filesystem check again. But the HDD wouldnt even load. It was gone. Unfortunatelly it was not realized that the second disk in the system was also not working any more for some time now. Fortunatelly we had our main site backed up externally though. So we could re-install a fresh box and mounted the two drives to the system. We checked the harddisk. One is practically empty (the older one), the other has almost only files in 'lost + found' but these are all "numbered", no real filenames or so.
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Oct 29, 2009
I did this several other similar servers here today without errors. I'm not quite sure what I'm getting hung up on here.
[root@devoratech yum.repos.d]# rpm -q centos-release
centos-release-5-3.el5.centos.1
[root@devoratech yum.repos.d]# yum repolist
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Feb 18, 2009
I've only used Linux for about a year or two now and have worked through suspend esume and WPA wireless issues with CentOS and my T61p. However, I'm stumped on this one. why my T61p freezes randomly (happened once while writing this topic) with the caps lock light blinking. I'm wondering if it has something to do with my nVidia driversettings andor using my wireless card and/or switching between home wwireless and work wwired connection.
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Feb 17, 2010
hey guys i am facing problem with command yppasswd on my server and clineti have configured my server well.when i run command yppasswd -p joe it shows that yppasswd is not running on master server below is error i get
[root@station226 ~]# cat service_restart
service nfs restart
service ypserv restart
[code]....
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Jul 14, 2010
It is any possibility to install centos 5.5 on ext4 by anaconda ? Is ext4 filesystem is secure for files server (samba) ?? In anaconda installer there is only ext2, ext3 choice.
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May 7, 2010
I want some users should be barred from login into some of NIS clients. Please help me to accomplish this. I googled it but still not very clear to me. Can you please tell me how it works. The OS is RHEL 5.
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Aug 27, 2010
I use bind 9.3.4 on RedHat 5.3, and I try to create some simple DNS related scenario. I have two DNS servers. One of them serves rodnower.org. zone and an other service web.rodnower.org. zone. The parent has glue record to child. I sussessfully query all rodnower.org. records, but failed to get data from subdomain. So here relevant data from namd.conf of parent zone:
Code:
view "main" {
zone "rodnower.org" IN {
type master;
file "rodnower.org.zone";
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Mar 25, 2011
After untarring the file and executing the binary for firefox, the following error is coming "brilliant:/firefox # ./firefox ./firefox-bin: error while loading shared libraries: libpangocairo-1.0.so.0: cannot open shared object file: No such file or directory". The libpangocairo-1.0.so.0 is there in /usr/lib.. I guess this is because the SuSE is 64 bit and the software Im trying to install is 32 bit.
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Oct 5, 2010
I'm using CentOs 5.4 (2.6.18-164.15.1.el5 #1 SMP Wed Mar 17 11:30:06 EDT 2010 x86_64). I tested out ext4 on a partition for the last few months and it seems to work fine. The issue is that quotas dont seem to work correctly on it. Is there a way to revert back to ext3? Mainly the quota tools do not work on it.
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Dec 18, 2010
I am trying to set up an atom D525 low power PC 64-bit with a 40 GB solid state disk drive. Is it possible to specify ext4 during the install for proper SSD suupport? I read somewhere that after install I can place a -discard line in fstab to enable trim.
Edit: should I have asked this in the x86_64 forum, as I was planning on installing 64 bit?
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Jul 6, 2009
I am noticing RHEL 5.4 is in beta. Does anyone know what 5.4's plans are for ext4? Is it still going to be a non-bootable addon? Or, will GRUB now boot off it?
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May 20, 2010
With the release of CentOS 5.5 ext4 is considered stable in this distribution so I decided to migrate to it. Luckily I started from migrating fresh server with CentOS 5.5 using some instruction I found on the internet. I think I shouldn�t say, that I screwed the whole thing up ;) After about 6 hours cursing, kicking, and crying I solved the task and figured the correct sequence of actions. The small problem with migrating root partition is that you can�t unmount it BTW.
During migration task, I found, that CentOS 5.5 rescue mode is somewhat broken a little in terms of ext4 support. It can mount ext4 partitions successfully. But its e2fsprogs package (tune2fs, e2fsck etc.) doesnt see ext4 partitions and say, that superblock is corrupted on a partition once is converted to ext4 (at least it did it for me. May be I should force filesystem type with -t ext4 switch?). Keep in mind, that if you screw your system up too badly, you will not be able to run tune2fs and e2fsck on it from rescue modeBut you will still able to mount it if it is not corrupted badly. In all below examples,Boot your system normally and login as root. Upgrade kernel if you wish (I usually use yum upgrade to upgrade all on new machines). Then upgrade/install some other packages
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Aug 29, 2011
Which file system uses Centos 5.6 by default, Ext3 or Ext4? I have installed on Ext3, it's upgrade from 5.5, but howto convert into Ext4 without damage or lost data?
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Apr 23, 2010
I got a problem booting ubuntu 10.4 RC but i solved it by replacing root partirion uuid in grub boot menu then I disapled totally uuid passing to linux from /etc/default/grub . but something else i noticed why grub choosed insmod=ext2 why not ext4 specially I use now ext4 .I tried by editing the grub boot menu replacing "insmod=ext2" by "insmod=ext4" it booted and the three lines error during booting that i used to see them science ubuntu 9.10 totally disappeared . really I dont understand can anybody explane for me.and if what i did was right ,can anybody tell me how to make grub always and permenantly detect ext4 as ext4 not as ext2.
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May 7, 2010
When running Matlab (7.10.0.499 (R2010a), 64-bit (glnxa64)) on CentOS 5.4 using vnc, the Xvnc chrashes and this is logged in syslog:
# grep vnc /var/log/messages
May 5 15:37:47 hornsund kernel: Xvnc[7195] general protection rip:594c79 rsp:7fffa0085318 error:0
May 6 12:30:43 hornsund kernel: Xvnc[7003] general protection rip:594c79
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CentOS is up to date as of beginning this week. Doing a quick net check suggests HW-problem ( HP DL380 G6), but I've tested both memory and cpu(s) without errors. We also had the same problem on Scientific Linux 5.4.
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Dec 16, 2010
Last week my server crashed. I'm trying to diagnose the cause.
This is the relevant error message in /var/log/messages:
Code:
I'm assuming that I can conclude, then, that apache/httpd was the cause of the memory leak?
Next, I've been tracking my memory usage. Using top, this is an average memory load level for my server:
Code:
I'd like to confirm if my understanding of this data is correct, because Plesk indicates that my memory usage is only 50% or less. (Though I have read a number of reports indicating that Plesk's measurements are frequently wrong.)
Top says: Of the 2,073,156K total memory, 1,982,572K (95.63%) is being used, 90,584K (4.37%) is free. Of that sum, 421,948K (20.35%) are being used as buffers. Additionally, of the 2,096,472K of Swap, 60K is used, and 887,700K (42.34%) is cached.
My questions: Is my memory actually being 95% used? Or is the buffered quantity (20.35%) not a use of physical/virtual memory? (i.e. is it disk usage?) Does the amount of cached Swap influence the percentage of physical/virtual memory being used?
In other words, who is correct? Plesk says I'm using 40-50% of my memory, whereas top says 85-95%.
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Jul 3, 2009
I am using CentOS5.2 and gnome 2.16, sometimes (not very often) when I open something and close it by clicking the CROSS on the top-right corner. The application crash and I lose all control (no keyboard anymore), I have to reboot the system by reset the machine. What's going on?
Yesterday, when I logon as root and run service setup, after I uncheck a sevice in the list and then start it, I click the CROSS on the top-right corner of the window, it popup a window (in the background) to ask me to save it or not, but then I total lose the control, no mouse, no keyboard. I try to reset the machine many times, but everytime when I repeat the same operation, it crash again. Seems that if I don't close it, everything would be fine!!!!
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Jul 7, 2009
when open an pdf and close the tab/windows at firefox I get the error at syslog: kernel: npviewer.bin[21396]: segfault at 0000001000000000 rip 00000030abe2646c rsp 00007fffb0978ca0 error 4
I use the last Acrobat Reader.CentOS 5.3 x86_64
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Oct 25, 2009
My exercise below is to check if glxgears crashes xorg of CentOS5.4 with Intel GM965 Chipset. Apparently I don't have luck in this case. Since the exercise failed, it means I will still stick to CentOS 5.2 (residing on a different partition) for a while, even though CentOS5.2 crashes glxgears too. After "yum upgrade" (done after moving all repos in /etc/yum.repos.d to elsewhere except CentOS-Base.repo and CentOS-Media.repo), I ran glxgears that consistently crashes CentOS5.2 xorg, an issue that upset me quite a bit.
During upgrade, I saw a line "grubby fatal error : unable to find a suitable template". I guess the my grub.conf is too confusing for the installer, but that is not big deal, I just used the kernel number 2.6.18-164 where it is applicable. Even this this new update, glxgears still crash the xorg (the screen froze and then a new login screen reappears). With this I am sure the 3D application might still crash the xorg from time to time. (I can still revert to CentOS5.2 with a tar file, but I am still thinking to just upgrade to Centos5.3 but I don't know how.)
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Nov 29, 2009
I using only Livecd CentOS 5.4 and my system crash in day about ~3-5 times , so I tired and want to know why this happen. (before I used live-cd 5.3 about 3 weeks and this problem still was. info : Linux livecd. localdomain 2.6.18-164.el5 #1 SMP Thu Sep 3 03:33:56 EDT 2009 i686 athlon i386 GNU/Linux.I load system perfect and If I just browsing then I will have crash after 5 hours latter , but if I install wine , xmms,lame,xmms-mp3,k3b-mp3,flash-plugin and after installing software I will look movies from internet , or lisining music on xmms mp3 format - my system UPTIME max will be ~30 minutes or less..And I want to ask, or in Live-cd I can start Firewall ? Becouse I think it's not started and then I try to ENABLE its looks like not responding.
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Aug 14, 2009
Is it possible to like have SMS sent to your cellphone when the server crashes or a process on the server dies?
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