> (Sorry, my first attempt had numerous errors such as typos. I've also
> rewritten parts and added a TO-DO, what I would do).
> THIS IS THE UPDATED VERSION OF THE SAME EMAIL.
> ...

It is my understanding that if the LBA48 property has been introduced to
O.F. "persistently", then a volume which is larger than 128 GB may indeed
be the boot volume.

But, it is still safer to limit the boot volume to two partitions, the
first of which is 128 GB (131,072 MB, actual capacity) with the remainder
being used for data storage which is not boot-dependent.

Thereafter, the other volumes may be larger than 128 GB.

Just a short refresher course:

1) the basic support, which is pre-MDD, is LBA28,

2) support for LBA48 before or during boot may be added "persistently"
using the O.F. hack, and

3) support for LBA48 after boot may be added using the Intech High-Cap
kernel extension, for appropriate versions of MacOS X, and

4) LBA48 really means that the OS software sends TWO commands (CDBs) to
the controller, the first of which contains the first 28 bits, and the
second of which contains the remaining 20 bits).

The only PowerPC Mac which I still have on my desk is a Mirror Drive Door
model, and the MDD models all have LBA48 permanently available.

My MDD machine was supplied with two very large HDDs, and both seem to
work appropriately. The machine also included two DVD burners which is
certainly a luxury.



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