Untitled

header is a fixed size metadata block
sector is a fixed size data block
extent is a variable size data block constructed from sectors


header - 16 words
sector 0 - block_size words
sector 1 - block_size words
sector 2 - block_size words
...
sector N

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sector:
next_sector_index - 1 word
data - block_size - 1 words

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extent (only exists in memory, not stored literally on disk):
#extents can be read to read a file as a continuous section like: (inode,(data|links))
size - 2 words
first_block - 1 word

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Reading a file:
start with path and root sector
read inode from root sector (using extent)
for for part of path:
    find link, get new sector id
    read sector, get new inode
#now we have the sector+inode of the file we want
create extent from inode, read extent to get file data