HPFS Fnode layout

• An Fnode is 512 bytes with fixed size info:

• • • Unique binary signature string 'ae 0a e4 f7'
    • Sectornumber (LSN) for Parent directory
    • First 15 characters of the filename (short name)
    • Length of filename, and length of the filedata
    • Type of the Fnode, either File or Directory
    • Allocation information, max of 8 LSN+size pairs
    • DASD limits (user quota, HPFS386 only)

• Then, variable sized info may be present, either in the Fnode itself or externally:

• • • Extended-attribute data (.longname, .icon etc)
    • Access Control Lists (HPFS386 only)