Adding Disks via LVM

In my last post, I mentioned that I like to use a 4GB disk for my root volume on any Linux VM's... this is mainly for local / dev environments, where you want to cram as many VM's as possible into a small space. But sometimes you need more space, in which case you can add another disk. This isn't as straight forward with lvm as it is without, so here's a nice easy step by step to help you get there after you have added a new disk to the VM. In this case, we are adding a new 2GB disk that will be configured as a new logical volume (you could of course just add to an existing volume if you wanted). We'll then format it with ext3 and mount it at /usr/local/pgsql/data.