A Robust Flash File System Since 2002

Yaffs (Yet Another Flash File System) is an open-source file system specifically designed to be fast, robust and suitable for embedded use with NAND and NOR Flash. It is widely used with Linux, RTOSs, or no OS at all, in consumer devices and critical infrastructure. It is available under GNU Public License, GPL, or on commercial terms from Aleph One.


New Yaffs in space!

NASA TESS Mission This Transiting Exoplanet Survey Satellite (TESS) will discover thousands of exoplanets in orbit around the brightest stars in the sky.

It is a project regularly using our Yaffs File System to store incoming data and preserve it, in the rigours of the space environment, before sending it back to Earth.

In a two-year survey of the solar neighborhood, TESS will monitor more than 200,000 stars for temporary drops in brightness caused by planetary transits. This first-ever spaceborne all-sky transit survey will identify planets ranging from Earth-sized to gas giants, around a wide range of stellar types and orbital distances. No ground-based survey can achieve this feat.

Some File Systems are not robust enough to be suitable for such exacting work.