>That is the address limit of the original 6-byte SCSI command set. 21
bits of block address ->  2^
>(21+9) 512-byte blocks =3D 1.073GB.

So far so good.

>Next address limit barrier is the 32-bit character pointer,=20

Yup

> which cuts off at 4.29GB.

I think that should be 2^(32-21) bigger than the
number you first thought of. I was going to say
that > 2TB is just silly but having seen a 250GB
drive today at a non-ridiculous price (admittedly IDE
not SCSI ...) I think I'll be careful to say nothing at all.
Maybe in a few years I can test that later limit :-)

Antonio
=20