[linux-lvm] can't find volumes

[Heinz J . Mauelshagen]

Mark,

that's probably the missing /proc in your chroot environment.

On Thu, Jun 26, 2003 at 12:12:24PM +0200, lvm at ruby.ridersoft.net wrote:
> Hi, I come seeking sage advice :)
> 
> Anyways, I've been busy installing a new Linux system using Gentoo. I am running this on a spare box, Duron 800 w 300mb, with the harddisk connected to the Promise ATA 100 onboard controller as /dev/hde8.
> 
> Al goes well, and I create the following partitions
> 
> /dev/hde6      swap
> /dev/hde7      ext3 fs     /boot
> /dev/hde8      lvm
> 
> I also create the pv on /dev/hde8 and a logical volume at /dev/lv/ide
> 
> /dev/lv/ide is my /
> 
> >From my running livecd I then chroot'ed into /dev/lv/ide, and then the troubles began. When I run vgscan when chroot'ed it doesn't find any volume groups. When I run vgchange, i claims that the VDGA record doesn't match the kernel, and urges me to run vgscan, running vgscan doesn't solve this problem since it doesn't find the volume groups.
> 
> ls -l /dev/lv/ide shows me that my volume group indeed doesn't excist. However, the mount command shows me that /dev/lv/ide is mounted at root. So in summary, I can't find the volumegroup, even tough I am working on/in it.
> 
> I decided to go ahead anyways, and created a initrd using lvmcreate_initrd (based on the kernel i made, 2.4.21 ) it does this, and when I boot it loads this initrd as it is supposed to. It neatly finds my /dev/hda and /dev/hdb cdroms, and once insmod'ed it also find /dev/hde, but the it runs vgscan and finds no volumegroups, that causes vgchange to not find anything either. That causes the kernel to panic, since it cannot find root.
> 
> Weird thing is, if I boot with any other rescue/livecd, such as SuSE rescue, knoppix or gentoo live cd, I can vgscan and vgchange -ay to find my volume group and logical volume. But once chroot'ed or booting to my new system, I cannot and will not find it.
> 
> Does anyone have any suggestions on why vgscan doesn't find anything and how to solve this ?
> 
> Many thanx in advance, I have been strugling with this one for almost a week now, and I am out of options. I have been able to install lvm as root on quite a few systems before, including a LFS system, but right now, I am stumped.
> 
> best regards
> Mark
> 
> 
> When I boot from a livecd image, such as 


-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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