forked from PoliEcho-holding-org/kern
40 lines
678 B
Plaintext
40 lines
678 B
Plaintext
= fsys =
|
|
|
|
Sector = 512 Bytes
|
|
Block = 4096 Bytes
|
|
|
|
Reserved sectors:
|
|
Sector 0 - Bootsector, will be loaded by the Bios into memory and executed (512B)
|
|
Sector 1..4 - Superblock, contains metadata about the filesystem itself (4KiB)
|
|
|
|
Superblock structure: (4096B)
|
|
FS Name
|
|
FS Size (Sector)
|
|
FS Size (Block)
|
|
INode Count
|
|
INodes per sector
|
|
INode Bitmap Block
|
|
Data Bitmap Block
|
|
INodes Start
|
|
Data Start
|
|
Root INode Number
|
|
Extents per indirect
|
|
|
|
INode structure: (64B)
|
|
Type
|
|
Size (bytes)
|
|
Block Count (size in blocks)
|
|
Mode
|
|
Extents[]
|
|
Single Indirect
|
|
Double Indirect?
|
|
|
|
Extent: (8B)
|
|
Block
|
|
Length
|
|
|
|
Directory Entry: (64B)
|
|
INode Number
|
|
Name (max length 60 Bytes)
|
|
|