TiBook, 1394, iPod working (sort of ;-)

Timothy A. Seufert tas at mindspring.com
Wed Nov 28 21:40:09 EST 2001

At 3:58 PM -0900 11/27/01, Ethan Benson wrote:
>On Tue, Nov 27, 2001 at 09:28:47AM -0800, Brad Boyer wrote:
>>  Well, according to Apple's documentation, the only version of HFS+
>>  is version 4, so I have no idea what's up with that...
>well it also doesn't document things like the permission bits, it just
>says they are unused and reserved, obviously this is not the case
>given OSX, apple just has not updated this document.
>that means theres a bit of reverse engineering involved as well since
>apple is using a newwer version of HFS+ which is not entirely

The documentation is the source now, it would seem.  (just like much
of Linux :)  See:


in the Darwin kernel (aka "xnu") source.  hfs_format.h defines the
on-disk layout, including the structure used for storage of
permission bits.

 From the information in that file it looks like the HFS+ version is
still 4, BTW.

Looks like it should even be possible to figure out how Apple did the
hard- and soft-link hacks.  Maybe one day Linux will be able to boot
directly from HFS+ just as Darwin does.  That would be perverse.  :)
Tim Seufert

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