HPFS DirBlock layout

• A DirBlock is 2048 bytes with fixed size info:

• • • Unique binary signature string 'ae 0a e4 77'
    • LSN for Parent and type Fnode or DirBlock (B-tree)
    • Sectornumber for THIS Directory-Block
    • Number of changes since creation of the block

• Then, variable sized Directory info with:

• • • A B-tree 'down' pointer (DirBlock LSN), OR
    • Three date/time fields creation, modify, last access
    • The standard (FAT, SHRA) attributes
    • File data length and extended-attribute length
    • Codepage number to use with the filename
    • Variable sized filename, max 254 characters