🚀 go-pugleaf

In article <AXTWepy00V4=43CEQR@andrew.cmu.edu> dg2l+@andrew.cmu.edu (Douglas Phillip Ghormley) writes:
>Does anybody out there know what the format of each sector is in the FFS?  The
>AmigaDos Manual goes into nice detail for the old file system, but the manual
>that comes with 1.3 doesn't (that I could find).  I know that data sectors
>contain only data, but what about drawers?  Where does the system keep track of
>the order of the sectors in the file?  How does the system keep track of which
>sectors have and have not been used?  etc, etc...
>
>-Douglas Ghormley
> dg2l+@andrew.cmu.edu

There are three main differences between an FFS partition and an oldfs one:-

1)	Data blocks contain nothing but data

2)	Hash chains are sorted from lowest to highest block numbers

3)	The boot block contains 'DOS/1' instead of 'DOS/0'

all of the file headers and extension blocks are in exactly the same format
as the old filing system (with the exception of bitmap pointers).  I made a
conscious decision to implement it this way so that disk utilities could be
ported to FFS with the minimum of pain.  I have written an article/document
listing the differences (and re-hashing the old information) for AmigaMail,
but I'll have to wait until it's published before I can make a more general
release.

	Steve