A reminder of how to shrink the root partition of a fresh Arch Linux installation on a Raspberry Pi.
I wanted to make more room on a 4GB SD card for a Linux From Scratch build, so I resized the root partition down to 700mb and created a new 3GB logical partition next to it.
I didn't have another Linux machine available, so I used OSX Mavericks to write the original Arch image to the SD card and do the initial filesystem resize. Everything else was done on the Pi itself.