Disk management isn’t complicated, but there’s enough material that it gets two chapters. Lucky you! In this chapter, we’ll start with how to automatically back up your vital root partition to a second disk. Then we’ll explore how OpenBSD can use additional memory as disk space via a memory filesystem and how to set that up. Next, we’ll access disks formatted for other operating systems, such as NTFS, ext2, and FAT. Removable media isn’t difficult to work with, but has its own concerns. If you don’t need the actual media, but can work with disk images, you can access those. Both topics are covered in this chapter. We’ll also discuss using NFS, as both a server and a client. Our final topic is OpenBSD’s disk redundancy and disk encryption features.