When you say "log-structured file system," most storage developers will immediately think of Ousterhout and Rosenblum's classic paper, The Design and Implementation of a Log-structured File System - and the nearly two decades of subsequent work attempting to solve the nasty segment cleaner problem (see below) that came with it. Linux developers might think of JFFS2, NILFS, or LogFS, three of several modern log-structured file systems specialized for use with solid state devices (SSDs). Few people, however, will think of SSD firmware...