[linux-lvm] resize an LVM physical volume

behzad r b_rahimi at hotmail.com
Tue Apr 20 13:19:42 UTC 2010


One of the client has a bladeframe that contains two linux nodes(one is prode and other one is test both have the same OS and are virtualized ) and I have a primergy that has a virtualized linux node on it by using vmware 
On client system there is a lun(EMC) that contains one partition /dev/sde1 , the partition is already enveloped by LVM , they have  increased the lun but I need to increase the physical partition /dev/sde1 , I have created the following procedure that is working on virtualized linux node on primergy 

umount /partition that must be increased 
pvdisplay /dev/sde2 | grep VG 
vgchange -a n myvg 
fdisk /dev/sde 
delete the partition and recreate a new one with same start cylinder and increase the number of cylinder 
pvresize /dev/sde1 
vgchange -a y myvg 
reiserfsck /dev/myvg/mylv 
but on bladeframe when I use the fdisk to increase the partition the system destroy everything the physical volume reject the partion  /dev/sde1 (when I run pvdisplay it's not on the list anymore)and all the data is destroyed I got a feeling that fdisk remove the /dev/sda1 and re-create a new one
here is the kernel information concerning the bladeframe 

#cat /etc/SuSE-release 
SUSE Linux Enterprise Server 10 (x86_64) 
# uname -a 
Linux #1 SMP Thu May 17 14:00:09 UTC 2007 x86_64 x86_64 x86_64 GNU/Linux 

And the virtualized node on primergy 

#cat SuSE-release 
SUSE Linux Enterprise Server 10 (i586) 
SLES10-LVM:/etc # uname -a 
Linux #1 Thu May 17 14:00:09 UTC 2007 i686 i686 i386 GNU/Linux 

We come up with another solution to create a new partion 
Fdisk new partition 
pvcreate /dev/sde2 
vgextend myVG /dev/sde2 

but this is not the right one 


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