computing Computing is any goal-oriented activity requiring, benefiting from, or creating computer, computing machinery. It includes the study and experimentation of algorithmic processes, and the development of both computer hardware, hardware and softw ...

, romfs (ROM filesystem) is an extremely simple file system lacking many features, intended for burning important files onto an

EEPROM EEPROM or E2PROM (electrically erasable programmable read-only memory) is a type of non-volatile memory. It is used in computers, usually integrated in microcontrollers such as smart cards and remote keyless systems, or as a separate chip d ...

. It is available on

Linux Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, pac ...

, and possibly other

Unix-like A Unix-like (sometimes referred to as UN*X, *nix or *NIX) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Uni ...

systems. It is very useful as an initial ROM holding kernel modules that can be loaded later as needed. It is very small, code wise. The description of the filesystem layout is available on LXR
romfs.rst
Bo Brantén has created a RomFS file system
driver for Windows NT/2k/XP
Nikolay Aleksandrov has written RomFS image extraction and manipulation tool calle
romfser
Primarily targeted at the BSD family of operating systems because they lack support for RomFS.

References

Free special-purpose file systems File systems supported by the Linux kernel {{Linux-stub