Firmware File System

File Format
Name	Firmware File System
Ontology	Electronic File Formats Filesystem Firmware File System

The UEFI Firmware File System is used to describe the layout of data inside a UEFI firmware image.

The magic number (actually a GUID) "d9 54 93 7a 68 04 4a 44 81 ce 0b f6 17 d8 90 df" is located 16 bytes into the file system image; the first 16 bytes are reserved for startup code.

Links

• UEFITool can read and modify FFS images embedded in UEFI firmware.
• FFSv0.9 specification