[lugm.org] scan disk on linux system.

Thu Jun 28 09:32:00 UTC 2012

should be possible, because there must be one way or the other to load an
OS on that hardware, otherwise, you wouldn't have been able to have an OS
dumped on that.

Hmm i haven't used OPENVZ, but from whati  just read "OpenVZ is
container-based virtualization for Linux." (quoted from
http://wiki.openvz.org/Main_Page)

Mount ISO image in a container quoted from
http://wiki.openvz.org/Mount_ISO_image_in_a_container
I guess it might be possible, your sysadmin may just be lazy...

I would try the OpenVZ liveCD to try creating those containers first and
see what i can come up with because accepting losing data or taking a
system down  (you have an alternative system right now to serve your
customer's right?)

On Thu, Jun 28, 2012 at 5:21 AM, Sebastien <david20 at intnet.mu> wrote:

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