[CentOS] Re: Where is the LVM config stored?

Wed Apr 4 10:32:46 UTC 2007
WipeOut <wipe_out at users.sourceforge.net>

>>>
>> Maybe I should explain exactly what I did because perhaps I am doing it
>> all wrong and thats why I am having so many issues..
>>
>> I have a Physical Centos box (we will call it PC) and I want to turn it
>> into a Virtual Centos box (VC).. I created the virtual machine in the
>> VMWare server console and then installed VC with a minimum Centos4
>> install.. I then went to PC and ran rsync with the various switches to
>> copy the entire filesystem from PC to VC across the network.. I excluded
>> /dev, /proc and /sys.. I also used the --delete option to remove any
>> files that exited on VC that were no longer on PC.. Then before
>> rebooting VC I checked fstab and grub.conf files to make sure they were
>> correct.. Finally I restarted VC and booted from CD1 in rescue mode to
>> run grub-install to get the boot sector and start up working right..Then
>> rebooted VC.. It starts up and then freaks when trying to sort out the
>> LVM volumes..
>>
>> The difference between PC and VC is that in VC I have decided to use a
>> scsi drive (apparently better performance) and in PC its an IDE and I
>> have made the virtual drive bigger.. I have tried running PC with and
>> without LVM (in other words using normal formatted partitions) and it
>> seems to have the same problem.. So even when no LVM volumes exist its
>> still looking for them..
>>
>> Obviously I have both systems live an running when I am doing the data
>> transfer.. There are no errors but would this cause a major issue?
>>
>> How do you migrate form physical to virtual?
>>
>> Thanks..
> Going from an IDE drive to a SCSI drive means you will have to make an initial
> ramdisk on the new system (initrd). The scsi drivers are modules in the
> kernel, and without an initrd with the drivers included and enabled, you can't
> mount the root to finish booting.
> Look here for a fix;
> http://kbase.redhat.com/faq/FAQ_80_3902.shtm
> 
> I don't see how an emulated scsi drive will perform any better than an
> emulated IDE drive, but I suppose it is possible.
> 

Scott, Thanks for the link and the input.. That seems to have solved the 
problem.. I wasn't aware that scsi needed the initrd generated.. To tell 
the truth I still don't know exactly what it does (my linux skills are 
pretty limited) but its working.. :)