[linux-lvm] Re: LVM 1.03 root file system on Redhat 7.3

[linux-lvm] Re: LVM 1.03 root file system on Redhat 7.3

[James B. Byrne]

On 30 May 2002 at 1:22, linux-lvm-request@sistina.com wrote:

> What I am seeing is this:
> 
> kmod: failed to exec /sbin/modprobe -s -k block-major-7 errno = 2 
> 
> repeated 16 times, followed by
> 
> vgvchange -- volume group "vg00" successfully activated
> 
> VFS: Cannot open root device "vg00"/lv01: or 00:00
> Please append correct "root=" boot option
> Kernel panic: VFS: Unable to mount root fs on 00:00


The kmod error is reputedly caused by the ramdisk image file 
(created by lvmcreate_initrd) not containing a /sbin/modprobe 
command.  How can I verify if this is so?  I note that redhat has 
/sbin/modprobe as a logical link to insmod.  Could this be confusing 
lvmcreate_initrd?

Regards,
Jim

---     e-mail is NOT a secure channel 
James B. Byrne                mailto:ByrneJB@Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
9 Brockley Drive              vox: +1 905 561 1241
Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3

Re: [linux-lvm] LVM 1.03 root file system on Redhat 7.3

[Daniel Savard]

le jeu 30-05-2002 à 02:22, James B. Byrne a écrit :

> 
> We are using the grub bootloader.  We have followed the 
> instructions contained in the the lvm howto document provided by 
> sistina, to the best of my ability to understand them.
> 
> The problem is that system gives a kernel panic when started using 
> the lvm boot option.  Is there a way to redirect the boot dialogue 
> output to a file?  It appears that the most informative messages may 
> be scrolling of the top of the screen.  What I am seeing is this:
> 
> kmod: failed to exec /sbin/modeprobe -s -k block-major-7 errno = 2 
> 
> repeated 16 times, followed by
> 
> vgvchange -- volume group "vg00" successfully activated
> 
> VFS: Cannot open root device "vg00"/lv01: or 00:00
> Please append correct "root=" boot option
> Kernel panic: VFS: Unable to mount root fs on 00:00
> 
> Help?
> 
> Regards,
> Jim
> ---     e-mail is NOT a secure channel 
> James B. Byrne                mailto:ByrneJB@Harte-Lyne.ca
> Harte & Lyne Limited          http://www.harte-lyne.ca
> 9 Brockley Drive              vox: +1 905 561 1241
> Hamilton, Ontario             fax: +1 905 561 0757
> Canada  L8E 3C3
> 

Although I am using lilo, I suppose it is the same problem I
encountered.

Don't know GRUB, but I suppose there is a line which specify your root
filesystem. You should have something like: /dev/myvg/mylv instead of
/dev/sdaX or /dev/hdaX or any disk name.

Regards,
-- 

=======================================
Daniel Savard
Consultation Informatique Daniel Savard
551, boul. Sir-Wilfrid-Laurier
suite 105
Beloeil, (Québec)
Canada J3G 4J1

Tél: (450) 467-8014
Internet: dsavard@cids.ca
=======================================

Re: [linux-lvm] Re: LVM 1.03 root file system on Redhat 7.3

[Daniel Savard]

le jeu 30-05-2002 à 13:44, James B. Byrne a écrit :


> 
> The kmod error is reputedly caused by the ramdisk image file 
> (created by lvmcreate_initrd) not containing a /sbin/modprobe 
> command.  How can I verify if this is so?  I note that redhat has 
> /sbin/modprobe as a logical link to insmod.  Could this be confusing 
> lvmcreate_initrd?

The symlink won't cause lvmcreate_initrd to create a ramdisk image with
the missing executable.

To check, just copy your initrd image somewhere, say /tmp, uncompress it
(gunzip) there and mount it on a mount point as a loop device:

Given an initrd uncompressed file name: my_image
Given a mount point named: /tmp/my_mount_point

Just type: mount -o loop /tmp/my_image /tmp/my_mount_point

After that, you can cd to /tmp/my_mount_point and look at the files and
executables there.

Regards,
> 
> Regards,
> Jim
> 
> ---     e-mail is NOT a secure channel 
> James B. Byrne                mailto:ByrneJB@Harte-Lyne.ca
> Harte & Lyne Limited          http://www.harte-lyne.ca
> 9 Brockley Drive              vox: +1 905 561 1241
> Hamilton, Ontario             fax: +1 905 561 0757
> Canada  L8E 3C3
> 

-- 

=======================================
Daniel Savard
Consultation Informatique Daniel Savard
551, boul. Sir-Wilfrid-Laurier
suite 105
Beloeil, (Québec)
Canada J3G 4J1

Tél: (450) 467-8014
Internet: dsavard@cids.ca
=======================================