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Re?: [linux-lvm] Re: Re

Le 03.03.2004 10:15, Patrick Caulfield a écrit?:
On Wed, Mar 03, 2004 at 09:57:30AM +0100, Jean-Luc Coulon (f5ibh)
Tank you patrick and Ken for the answers,

Here is what I dit.
I've moved my root filesystemen (logical volume) to xfs and compiled
couple of kernels, il was a bit long, my machine is not so fast. The

first one with xfs hard coded and the second with xfs as a module
applying the recipe given by Ken: I have built the normal initrd with

lvmcreate_initrd, then mounted/edited/copied it and have the

With XFS hardcoded, everything went fine and the system is running

With XFS as a module it isnot the case, even if the system load the
modole at boot, I get a kernel panic. Here are the messages I wriiten

down by hand ( :-O ):

|... snipped ..
| RAMDISK: Compressed image found at block 0
| Freeing initrd memory: 1532k freed
| VFS: Mounter root (ext2 filesystem)
| LVM version 1.0.8 (17/11/2003à module loaded
| SGI XFS with no debug enabled <-- was happy ;-)
| SGI: XFS Quota Management subsystem
| vgscan -- reading all physical volumes (this may take a while)
| vgscan -- found inactive volume group "v00"
| vscan -- ERROR 28 writing volume group backup file
| /etc/lvmtab.d/vg00.tmp in vg-cfgbackup.c [line 273]
| vgscan -- ERROR: unable to do backup of volume group "vg003
| vgscan -- ERROR: "lvm_tab_vg_removed": ulink "removing volume group
| "vg00" and "/etc/lvmtab.d" succesfully created
| vgscan -- WARNING: This program doesnt do a VGA backup of your
| volume group
| vgchang -- no volume roup found
| VFS. Cannot open root device "3a02" or 3a:02
| Please append a corret "root=" boot option
|Kernel panic: VFS: Unable to mount root fs on 3a:02

End of story.
It seems to find and load my xfs module but then there is a vgscan
problem. As it work fine with xfs hard coded, I don't really *need*
as a module but I would like to know where is the problem

It looks like the initrd is too full to hold the LVM metadata backups. That's one of the prolems with adding stuff to initrds - it takes up space that might be needed for other things!


Finally, I've modified the lvmcreate_initrd script to add the path to xfs.o and modprobe the module in linuxrc. This way, it works... even if it is not better than with the xfs driver hard coded in the kernel ;-)

			- Jean-Luc

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