Using kickstart to resize existing LVM partitions during a rebuild

[Barry O'Rourke]

Hi,

We have around 300 RHEL4 boxes that we are looking to upgrade to 
Scientific Linux 5, as part of the rebuild we would like to double the 
size of our current root partition to allow for future expansion and 
because they are getting a bit short on free space.

Our current LVM set up looks like;

/dev/mapper/ifp-slash		15Gb
/dev/mapper/ifp-var		2Gb
/dev/mapper/ifp-log		2Gb
/dev/mapper/ifp-scratch		fills the rest of the disk.

We intend to script the shrinking of the ifp-scratch LV before starting 
the rebuild to free up 15Gb free space within the volume group which we 
would then like to add to the ifp-scratch LV during the rebuild.

During the rebuild the ifp-scratch LV must stay intact as our users dump 
a lot of there data there.

The problem that I've been having is that I can't figure out the syntax 
required for the logvol line in the kickstart file that will resize the 
ifp-slash to 30Gb. Every attempt that I've made so far seems to resize 
it to 15Gb as it was before.

If you need any more information please let me know, and thanks in 
advance for any help that is offered.

Barry