LVM progress update
So the resize of /home worked but i couldn’t manage to resize the block device size. So fortunately i had a spare 200gb hard disk, so i made a new volume group and added the new hard disc as a physical volume, i then made two logical volumes on that, one for root and one for home and format them both with reiserfs, the root logical volume i mount on /mnt/tmp and copy the root filesystem with cp -vaRx / /mnt/tmp which seems to work properly, and then the same for root.
My next problem is I cant boot off the lvm because the required kernel modules arent in initrd. so I have to run mkinitrd /dev/system/rootlv from the path of the root file system device it works out what modules are required to allow the kernel to mount the root filesystem. Then /boot/grub/menu.lst has to be updated and /etc/fstab to mount the logical volumes instead of the old physical ones.
Cross your fingers and do an init 6, and hopefully you will have a bootable system off the logical volume.
If your in luck you can now start working on moving the volume group back onto the original hard disks, or in my case the dmraid. I’ll update with that later.