Discuss May 2010

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270 participants
216 discussions

Grub Error 22; no Windows
by Jeff Sadino 21 May '10

21 May '10

Hello, I have a GridEngine setup with 5 subnodes and two RAIDS attached. I backed up the OS drive - 120GB - to an external hard drive - 500GB - using ddrescue. The OS drive is partitioned as: sda1 has the OS and is about 7 GB sda2 has /var and is about 4 GB sda3 has swap and is about 1 GB After backing up, there were 4KB of errors, but all at the end of the disk around 118GB. This used to be a partition back in the day, but I deleted it accidentally. I want to back up to this new larger disk b/c the original 120GB disk is discontinued. I boot from a live cd - SystemRescue CD - and run e2fsck -c -c -C 0 y on sda1 and sda2 on the backup drive, and it seems to finish fine. Then I replaced the OS drive with the backup drive, and it goes to boot, then Grub Loading Stage 1.5; Error 22. Here's the important stuff from fstab: # This file is edited by fstab-sync - see 'man fstab-sync' for details LABEL=/1 / ext3 defaults 1 1 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 /dev/md0 /export ext3 defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 LABEL=/var /var ext3 defaults 1 2 LABEL=SWAP-sda3 swap swap defaults 0 0 /dev/sdb1 swap swap defaults 0 0 # The ram-backed filesystem for ganglia RRD graph databases. tmpfs /var/lib/ganglia/rrds tmpfs size=252709000,gid=nobody,uid=nobody,defaults 1 0 /dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0 I boot up from the live cd, and then tell it to search for bootloaders on the drives, and it finds one, and it goes through, and then throws errors b/c it is mounting the OS /sda1 drive and then trying to run fsck on it. I tried setting the error-check values to 0 for /1 and /var, but it is still trying to error check it. My blkid says that sda1, sda2, and sda3 all have different UUIDs. sdc1, sdd1, and md0 all have the same UUID. md0 is a RAID1 comprised of sdc1 and sdd1. sdc and sdd are identical drives. This used to happen, and I would just restart a couple of times, and it would sneak on past the error eventually, but to no avail this time. Does anyone have any ideas? Thank you so much! And thank you to the dozen people who offered advice on the best backup option. After reading all of the replies and the links, I think I will prob go with the rsync-backup suggestion. Mahalo, Jeff

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Nautilus: Error: Not on the same filesystem
by Frank Cox 20 May '10

20 May '10

There appears to be a new bug in Nautilus in Centos 5.5 when trying to move and delete files. Error "Not on the same file system" while moving. A google search found this: http://centos.org/modules/newbb/viewtopic.php?topic_id=26205&forum=37 -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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5.5 ISO size vs RHEL
by Anthony Caetano 20 May '10

20 May '10

Hi We use CentOS and RHEL, the 5.5 RHEL ISO for x86_64 is 3.7GB (**), the CentOS one is 4602MB (***) split over two DVDs. Is this reasonable and correct? Any ideas why would there be such a discrepancy if they are built from the same (or very similar) source? Regards Anthony Caetano ** the md5sum checks out, and RHN lists the size as 3,532 MB *** CentOS-5.5-x86_64-bin-DVD-1of2.iso + CentOS-5.5-x86_64-bin-DVD-2of2.iso (according to ftp.heanet.ie:/pub/centos/5.5/isos/x86_64 )

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Re: [CentOS] trying to rebuild an old nvidia driver
by m.roth＠5-cent.us 20 May '10

20 May '10

mark wrote: Akemi wrote: >> On Wed, May 19, 2010 at 2:05 PM, <m.roth(a)5-cent.us> wrote: >>> Let me start by saying that no, I can't get a new card for my user. > >> No problem with that. > >>> So, I've got the 96 nvidia driver. I've rebuilt it several times before, >>> and Nvidia's installer's always worked fine. Actually, I have the 73 on my >>> system, and just updated to 5.5, and no problem. > >> I suggest you give the ELRepo package a try: > >> http://elrepo.org/tiki/kmod-nvidia-96xx > Thanks! I'll try that tomorrow. *sigh* Well, I did that, and then went through a song-and-dance uninstalling the stuff the nvidia installer had put in, and uninstalling this so that would succeed, and then *really* getting rid of the stuff it wouldn't, and then using yum again. And it still got trash. My user's sure he had not turned it off, that he just came in one morning and it had lost it, and I have every reason to believe him (he *does* know what he's doing). So, at this point, we've given up - his machine wasn't on a UPS, and given the power in this building, there's a high probability of a surge, and something on the card got fried - so he's got another machine, and we're probably going to call this one dead. Thanks, though, for the el repo link. I've got to remember that one. mark

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Problems after update to 5.5
by Colin Coles 20 May '10

20 May '10

Hi, I have updated 8 machines so far and 2 are refusing to boot on 2.6.18-194.3.1.el5 kernel, they just hang at: 'Starting udev:' but when I revert to 2.6.18-164.15.1.el5 kernel they boot fine. Any pointers? Cheers, Colin.

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[Solved] Yum segmentation fault when updating to CentOS v5.5
by Sorin Srbu 20 May '10

20 May '10

>-----Original Message----- >From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf >Of Sorin Srbu >Sent: Monday, May 17, 2010 11:29 AM >To: 'CentOS mailing list' >Subject: Re: [CentOS] Yum segmentation fault when updating to CentOS v5.5 > >>Tried with yum update kernel*, yum update kernel-headers, yum update *lib* >>and yum update httpd. Still gives me the seg fault error. 8-/ > >Never mind this problem. Just tried to start httpd and it gave me a >segmentation fault as well. Something is not right with this particular >machine and I think it's for the best to do a complete reinstall anyway. Seems like a bad ram-stick, and insufficient cooling of the same, might have had something to do with the inconsistent errors I kept getting. I added four new ram-sticks and so far the problems have not come back. Thanks all for the help when trouble-shooting! -- /Sorin

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How to create a printer that prints directly to a file?
by Bryan Berry 20 May '10

20 May '10

I am trying to learn how to share printers using samba. I am doing most of my experiments at home w/ libvirt and where there are no printers. How can I set up a printer device that just prints to a file on my system? That would really help me in my experiments.

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Networking setup/help
by tdukes＠sc.rr.com 20 May '10

20 May '10

I had to install 5.5 from scratch and now I have to rebuild my home networking system. I haven't had to mess with this stuff in over 5+ years and I'm sure there may be better ways of doing it now. My liunx box acts as firewall/gateway for 2 other pcs. I was using a script from the Linux IP Masquerade HOWTO with ddclient (since I have a dynamic ip). Also, I don't think I need a full name server. Can I get by with a caching nameserver? Thanks!! Eddie

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A Directory/Subdirectories Disappeared - which log file to look for this kind of information?
by Wang, Mary Y 19 May '10

19 May '10

Hi, A directory/subdirectories just disappeared on our dev box, and we don't know what happened. Is there a log file that logs this kind of stuff (such as who/date did a 'rmdir'). The /var/log directory has a lot of files and I'm not sure where to start. Thanks in advance. Mary

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Generic RAID question
by James Bensley 19 May '10

19 May '10

Does anyone know if using unequal drives in a RAID 0 is possible? I was looking to set up a software stripe but if I have two volumes of unequal size I wish to stripe over, will the OS try and work around this by say only using as much space as is available on the smallest drive or is there anyway it will use all of both drives? Does it have to be a perfect block/byte balance across drives? (I'm assuming yes?) -- Regards, James. http://www.jamesbensley.co.cc/

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Discuss May 2010