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Re: [linux-lvm] Problems mounting LVM root volume



check your rc.sysinit script for the lvm section mine
had a check for /proc/lvm before it did vgchange
portion which doesn't exist until you do a vgchange
--- Patrick van den Berg <P van den Berg ogd nl>
wrote:
> 
> Hello everybody, 
> 
> I'm new at using LVM and I ran into trouble using
> it. I've got problems 
> mounting an LVM volume as root on my system running
> Gentoo Linux 1.4. My 
> configuration is as follows (skip to the bottom of
> the text for the actual 
> error message): 
> 
> Gigabyte mainboard with onboard Promise RAID. I've
> got 2 80GB discs attached 
> (same model) and configured as RAID1. I installed
> via the Gentoo RC1 Stage 1 
> CDROM. During boot of the CD I had to abort and add
> the "IDE0=0x9400,0x9802 
> IDE2=0x9c00,0xa002" parameters to be able to load
> the pdcraid module. 
> 
> My fstab looks as follows: 
>  
> /dev/ataraid/disc0/part1  /boot       ext3     
> noauto,noatime  1  1 
> /dev/vg3/rootlv           /           reiserfs 
> noatime         0  0 
> /dev/ataraid/disc0/part2  none        swap      sw  
>            0  0 
> /dev/cdroms/cdrom0        /mnt/cdrom  iso9660  
> noauto,ro       0  0 
> proc                      /proc       proc     
> defaults        0  0 
> tmpfs                     /dev/shm    tmpfs    
> defaults        0  0 
> 
> I also compiled my kernel using the gentoo-sources,
> and with the following 
> options enabled: 
> 
> - LVM support 
> - Built-in RAM disk support with initrd 
> - DEV fs support 
> - mount DEV filesystem at boot
> - ReiserFS support 
> 
> I also ran lvmcreate_initrd with the -M option,
> because everything is compiled 
> in the kernel. Also, when I run lvmceate_initrd
> without the -M options, it 
> returns errors and the lvm image is not created. 
> 
> My grub,conf (linked to menu.lst) looks as follows: 
>  
> default 0 
> timeout 30 
> splashimage=(hd0,0)/boot/grub/splash.xpm.gz 
> 
> title=Gentoo 1.4 GNU/Linux on Antigone 
> root (hd0,0) 
> kernel /boot/bzImage root=/dev/vg3/rootlv
> ide0=0x9400,0x9802 ide2=0x9c00,0xa002 
> initrd /boot/initrd-lvm.gz 
> 
> 
> When I boot the system grub starts correctly, but
> when grub wants to boot my 
> system the following messages appear: 
> 
> Code: 
> RAMDISK: Compressed image found at block 0 
> Freeing initrd memory: 994k freed. 
> VFS: Mounted root (ext2 filesystem). 
> Mounted devfs on /dev 
> vgscan -- found inactive volume group "vg3" 
> vgscan -- ERROR 28 writing volumegroup backup file
> /etc/lvmtab.d/vg3.tmp in 
> vg_cfgbackup.c [line273] 
> vgscan -- ERROR: "lvm_tab_vg_remove(): unlink"
> removing volume group "vg3" 
> from "/etc/lvmtab.d" 
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d"
> succesfully created 
> vgscan -- WARNING: This program does not do a VGDA
> backup of your volume group 
> 
> vgchange -- no volume groups found 
> 
> VFS: Cannot open root device "vg3/rootlv" or 00:00 
> Please append a correct "root=" boot option 
> Kernel panic: VFS: Unable to mount rootfs on 00:00 
> 
> 
> Now, the strange thing is, when I boot via the CD
> and do vgscan and
> vgchange -ay by hand, I can mount /dev/vg3/rootlv
> normally! 
> 
> Does anybody got any ideas? I've run out of them  
> 
> Thanks for any help in advance. When you need any
> more info, just say so. 
> 
> Regards, 
> Patrick
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm sistina com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at
http://tldp.org/HOWTO/LVM-HOWTO/


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