"File systems and hard drives have always been fascinating to me, ever since I invested way too much money in a large (at the time) 80MB drive for the computer I was using in the early 90s. There's just something neat about blasting big chunks of data back and forth across your bus, reading and writing thousands of files, and doing benchmarks.
"Maybe you don't share my infatuation of hard drives and the software that keeps track of files and directories, but you're probably at least a bit interested in keeping your data safe, using your drives efficiently, and squeezing as much performance as possible from your system's meager I/O subsystem..."