Max Pismo ATA address space

How much address space does the Pismo's ATA controller address?

I see lots of discussion on address limits in G3/G4 towers, cubes,
etc... but far less about PB's.

Will anything less than ~120GB be OK, or is there a hidden gotcha
somewhere?

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David Lesher wrote:

> How much address space does the Pismo's ATA controller address?
>
> I see lots of discussion on address limits in G3/G4 towers, cubes,
> etc... but far less about PB's.
>
> Will anything less than ~120GB be OK, or is there a hidden gotcha
> somewhere?

The Pismo should support up to 128 GB on its internal ATA controller.
The support for 128 GB is part of the standard logical block addressing
mechanism (28-bit logical sector number = 256M sectors of 512 bytes each
= 128 GB).

The Pismo is described as having an ATA-5 bus, which is the same as the
Titanium PowerBook G4 models. You can definitely put 120 GB in a
Titanium PowerBook G4, as I have a friend who has done it, and I had a
60 GB in mine. Aluminium 15" and 17" models support even higher capacity
drives (ATA-6, 48-bit LBA).

Earlier PowerBook G3 models might have issues with drives larger than 8
GB, e.g. requiring Mac OS X to be installed in a partition which fits
entirely within the first 8 GB, but I'm not aware of anything with a
hardware limit below 128 GB (unless you get back into really old
technology).

--
David Empson
dempson.TakeThisOut@actrix.gen.nz