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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Well they told me it’s not possible on </span>OpenVZ<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> discuss-bounces@discuss.lugm.org [mailto:discuss-bounces@discuss.lugm.org] <b>On Behalf Of </b>selven<br><b>Sent:</b> Thursday, June 28, 2012 1:02 PM<br><b>To:</b> LUGM Discuss Mailing List<br><b>Subject:</b> Re: [lugm.org] scan disk on linux system.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>your datacenter should normally be fine in helping you do that... <o:p></o:p></p><div><p class=MsoNormal>On Thu, Jun 28, 2012 at 5:00 AM, selven <<a href="mailto:pcthegreat@gmail.com" target="_blank">pcthegreat@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal>Hmm, maybe this is too late, but couldn't you have booted off a bootable disk and the mounted your partitions and then chrooted to that and then try to rebuild your initdrd using mkinitrd? <br><br>+selven<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Jun 28, 2012 at 4:56 AM, Sebastien <<a href="mailto:david20@intnet.mu" target="_blank">david20@intnet.mu</a>> wrote:<o:p></o:p></p><p class=MsoNormal>Hello,<br><br>Thanks for your input. It was a bad initrd but there no way to boot off the<br>OS. I had to reload at the end.<br><br>Better to use VPS based kvm next time. At least I wll be able to boot on<br>knoppix or custom recovery when the OS crashed.<br><br>Thanks<br><br>Seb<o:p></o:p></p><div><div><p class=MsoNormal><br>-----Original Message-----<br>From: <a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a><br>[mailto:<a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a>] On Behalf Of Keshwarsingh Nadan<br>Sent: Wednesday, June 27, 2012 8:40 PM<br>To: 'LUGM Discuss Mailing List'<br>Subject: Re: [<a href="http://lugm.org" target="_blank">lugm.org</a>] scan disk on linux system.<br><br>Hello,<br><br>Assuming the virtual hard drive isn't having a problem (and it may very well<br>be) the issue you're seeing is a bad initrd, the kernel is almost certainly<br>going to need a new initrd.<br><br>You may be able to get into a repair shell using 'rdshell' kernel argument,<br>but only if this is a newer version of CentOS (6 is when that came in? I<br>think?) If you can get into rdshell then you can manually mount the LVM and<br>get a working root filesystem.<br><br>Easiest way is if the 'rdshell' kernel option gives you a dracut repair<br>shell when it fails to mount the LVM. Try another boot and when Grub comes<br>up edit your kernel options to add that at the end, then proceed with<br>booting. When the mounting fails, you should drop into a repair shell rather<br>than a kernel panic. If you get into dracut's repair shell, then your google<br>fodder is 'manually mount LVM'. If you get the file system mounted<br>successfully you're golden, as at that point you can build a new initrd to<br>replace the failing, reboot, and you're done. (Google fodder mkinitrd)<br><br>lvm vgscan -v<br>lvm vgchange -a y<br>lvm lvs -all<br>mount /dev/volumegroup/logicalvolume /mountpoint<br><br>Second option would be to boot the VM from a LiveCD or DVD image, preferably<br>one that is very close (in CentOS versions and kernel versions) to your VM<br>image's OS - then mount the filesystem, chroot to it and rebuild your<br>initrd. Google fodder for that process is 'bad initrd'.<br><br>The last option (and not guaranteed to work first try) if you have another<br>virtual image of an operable VM. Go back to that operable VM and make a new<br>initrd there. Then boot the non-operable VM using a LiveCD boot disk, mount<br>the LVM drive, and copy the new initrd to the VM's /boot directory.<br><br>The new initrd must incorporate the kernel modules needed to function on the<br>non-operable VM, so it isn't as simple as just running mkinitrd on the<br>operable VM - you first need to make certain all the modules needed for the<br>virtual hardware are in your non-operable VM's config or you'll run into the<br>exact same problem you're having now.<br><br>Regards,<br>kn<br><br>-----Original Message-----<br>From: <a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a><br>[mailto:<a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a>] On Behalf Of Ajay R Ramjatan<br>Sent: Wednesday, June 27, 2012 6:14 PM<br>To: LUGM Discuss Mailing List<br>Subject: Re: [<a href="http://lugm.org" target="_blank">lugm.org</a>] scan disk on linux system.<br><br>Hi there,<br><br>Sorry to hear about your distress. If you have an IP-KVM, please use this to<br>boot with a boot-cd (ask your datacenter for help) and rescue your system.<br>If not, ask the datacenter to do it for you and give them precise<br>instructions on what you want done. E.g., do you want a rescue or a<br>completely new install? Do you want to preserve data on certain devices such<br>as /home?<br><br>Now is the time you will be testing how good your backup mechanism is<br>assuming something ReallyBad(TM) happened. I wish you can solve your problem<br>with just a simple reboot and fsck with the help of your datacenter tech<br>guys.<br><br>Let us know how it works out!<br><br>On Wed, Jun 27, 2012 at 5:12 PM, Sebastien <<a href="mailto:david20@intnet.mu" target="_blank">david20@intnet.mu</a>> wrote:<br>><br>> Of course the lazy option is to reload. . .I am just curious on this one.<br>><br>> -----Original Message-----<br>> From: <a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a><br>> [mailto:<a href="mailto:discuss-bounces@discuss.lugm.org" target="_blank">discuss-bounces@discuss.lugm.org</a>] On Behalf Of Chris Wilson<br>> Sent: Wednesday, June 27, 2012 4:01 PM<br>> To: LUGM Discuss Mailing List<br>> Subject: Re: [<a href="http://lugm.org" target="_blank">lugm.org</a>] scan disk on linux system.<br>><br>> Hi Sebastien,<br>><br>> On Wed, 27 Jun 2012, Sebastien wrote:<br>><br>>> I was working on a remote system installing cpanel and stuff like<br>>> that. I run scandisk while the file system was mounted.<br>>><br>>> Now the system is not able to boot. Getting kernel panic at boot.<br>>><br>>> I am a bit lazy to reconfigured the server again. I am using Xen and<br>> centos.<br>>> Any ideas what can be done?<br>><br>> You're a bit lazy in providing details about the problem too. Maybe if<br>> you imagine the problem really hard, we might be able to psychically<br>> determine what it is and fix it for you using telekinesis.<br>><br>> If you're as lazy as you say, then reinstalling will be easier than<br>> recovering the server, which sounds like it might be seriously hard<br>> work, depending on how many "errors" you "fixed" in fsck. By the way,<br>> if you really ran scandisk and not fsck against the filesystem, you<br>> might as well give up now.<br>><br>> If you're as lazy as you say, you might find that having good backups<br>> helps you to get away with it.<br>><br>> Cheers, Chris.<br>> --<br>> Aptivate | <a href="http://www.aptivate.org" target="_blank">http://www.aptivate.org</a> | Phone: <a href="tel:%2B44%201223%20967%20838" target="_blank">+44 1223 967 838</a> Future<br>> Business, Cam City FC, Milton Rd, Cambridge, CB4 1UY, UK<br>><br>> Aptivate is a not-for-profit company registered in England and Wales<br>> with company number 04980791.<br>><br>><br>> __________________________________________________________<br>> Linux User Group of Mauritius (LUGM) Discuss mailing list<br>> Website: <a href="http://lugm.org" target="_blank">http://lugm.org</a><br>> Mailing list archive:<br>> <a href="http://discuss.lugm.org/pipermail/discuss_lugm.org/" target="_blank">http://discuss.lugm.org/pipermail/discuss_lugm.org/</a><br>> Forum: <a href="http://lugm.org/forum/" target="_blank">http://lugm.org/forum/</a><br>> IRC: #<a href="http://linux.mu" target="_blank">linux.mu</a> on Freenode<br>><br>><br>> __________________________________________________________<br>> Linux User Group of Mauritius (LUGM) Discuss mailing list<br>> Website: <a href="http://lugm.org" target="_blank">http://lugm.org</a><br>> Mailing list archive:<br>> <a href="http://discuss.lugm.org/pipermail/discuss_lugm.org/" target="_blank">http://discuss.lugm.org/pipermail/discuss_lugm.org/</a><br>> Forum: <a href="http://lugm.org/forum/" target="_blank">http://lugm.org/forum/</a><br>> IRC: #<a href="http://linux.mu" target="_blank">linux.mu</a> on Freenode<br><br>__________________________________________________________<br>Linux User Group of Mauritius (LUGM) Discuss mailing list<br>Website: <a href="http://lugm.org" target="_blank">http://lugm.org</a><br>Mailing list archive: <a href="http://discuss.lugm.org/pipermail/discuss_lugm.org/" target="_blank">http://discuss.lugm.org/pipermail/discuss_lugm.org/</a><br>Forum: <a href="http://lugm.org/forum/" target="_blank">http://lugm.org/forum/</a><br>IRC: #<a href="http://linux.mu" target="_blank">linux.mu</a> on Freenode<br><br><br>__________________________________________________________<br>Linux User Group of Mauritius (LUGM) Discuss mailing list<br>Website: <a href="http://lugm.org" target="_blank">http://lugm.org</a><br>Mailing list archive: <a href="http://discuss.lugm.org/pipermail/discuss_lugm.org/" target="_blank">http://discuss.lugm.org/pipermail/discuss_lugm.org/</a><br>Forum: <a href="http://lugm.org/forum/" target="_blank">http://lugm.org/forum/</a><br>IRC: #<a href="http://linux.mu" target="_blank">linux.mu</a> on Freenode<o:p></o:p></p></div></div></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p></div></div><p class=MsoNormal><span class=hoenzb><span style='color:#888888'>-- <o:p></o:p></span></span></p><div><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;color:#262626'>Pirabarlen Cheenaramen </span></b><span lang=EN-GB style='font-size:10.0pt;color:#262626'>| $3|v3n<b> </b></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:8.5pt;color:#404040'>L'escalier</span><span style='color:#888888'><o:p></o:p></span></p></div><p style='margin:0in;margin-bottom:.0001pt'><span lang=EN-GB style='font-size:8.0pt;color:#404040'>mobile: <a href="tel:%2B230%2049%2024%20918" target="_blank">+230 49 24 918</a></span><span style='color:#888888'><o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;color:#1F497D'>email: <a href="mailto:pcthegreat@gmail.com" target="_blank">pcthegreat@gmail.com</a> || <a href="mailto:god@hackers.mu" target="_blank">god@hackers.mu</a></span><span style='color:#888888'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;color:#1F497D'>contact: <a href="http://godifiy.me/" target="_blank">http://godifiy.me</a></span><span style='color:#888888'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.5pt;color:#1F497D'>/*memory is like prison*/ (user==selven)?free(user):user=malloc(sizeof(brain));</span><span style='color:#888888'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;font-family:Webdings;color:#336600'>P </span><span lang=EN-GB style='font-size:8.0pt;color:#336600'>Save electricity & disk space. Cat this mail to >/dev/null 2>&1 after use.</span><span style='color:#888888'><o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><br><br clear=all><br>-- <o:p></o:p></p><div><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;color:#262626'>Pirabarlen Cheenaramen </span></b><span lang=EN-GB style='font-size:10.0pt;color:#262626'>| $3|v3n<b> </b></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:8.5pt;color:#404040'>L'escalier</span><o:p></o:p></p></div><p style='margin:0in;margin-bottom:.0001pt'><span lang=EN-GB style='font-size:8.0pt;color:#404040'>mobile: +230 49 24 918</span><o:p></o:p></p><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;color:#1F497D'>email: <a href="mailto:pcthegreat@gmail.com" target="_blank">pcthegreat@gmail.com</a> || <a href="mailto:god@hackers.mu" target="_blank">god@hackers.mu</a></span><o:p></o:p></p></div><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;color:#1F497D'>contact: <a href="http://godifiy.me/" target="_blank">http://godifiy.me</a></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:8.5pt;color:#1F497D'>/*memory is like prison*/ (user==selven)?free(user):user=malloc(sizeof(brain));</span><o:p></o:p></p></div><div><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;font-family:Webdings;color:#336600'>P </span><span lang=EN-GB style='font-size:8.0pt;color:#336600'>Save electricity & disk space. Cat this mail to >/dev/null 2>&1 after use.</span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>