Wow, you guys are quiet today. To answer one of my own questions:

So take the advertized size:
  4000000000000

Divide it in to 1M chunks:
  4000000000000/1048576=3814697.265625M

Round down:
  3814697M

Subtract 2 for the reserved sectors at the front and back:
  3814695M

This equals
  3814695*2048 512byte logical sectors
or
  3814695*256 4096byte physical sectors

I would expect any drive with the same advertised size to be able to
create partitions totaling up to that value.

I surveyed eight GPT drives.
  * All are at least somewhat bigger than the advertised (decimal) size.
  * GPT normally does 1M (512*2048) partition alignment
  * GPT seems to reserve 34 logical 512 byte sectors at the beginning
and end of the disk (under 1M).

-- 
Anthony Carrico


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