A computer system includes a processor and a persistent data storage. The persistent data storage includes flash-like storage media that includes multiple contiguous memory blocks. Each of the contiguous memory blocks includes multiple contiguous memory pages. Multiple file systems executable by the processor manage file data and the file system structure of files stored in the persistent data storage. A core executable by the processor provides a common internal model and software routines that provide common functionality to each of the file systems. Some of the file systems are executable to reconstruct the one or more file systems using a plurality of transaction records that may be executed a plurality of times and always render the same effect.