[Osmium]

Good to know. For some reason I didn't think iOS used the disk as a memory cache, so didn't think that would matter?

[ryanpetrich]

It doesn't use it to implement paging, but many things do use the disk as a cache (URL cache, keyboard cache, icon cache, Spotlight, app-specific caches, etc) and running low on disk space will cause the background cache cleaner daemon to run.