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Hale Landis wrote:
> Anyone care to comment or can anyone point me at any documentation
> that describes something different? Is anyone aware of any attempt to
> standardize a new partition table format that would support 48-bit
> (or more likely 64-bit) LBA values?
I've seen a proposal from Intel that uses 64-bit values for starting and ending
LBA. It also contains two GUIDs(*), one to identify the partition type, a
second that uniquely identifies the partition.
Each partition table entry is 128 bytes long (including a 36-character unicode
name -- 72 bytes -- for the partition), and the document reserves a minimum of
16K for the partition table, so it can describe at least 128 partitions.
The partition table and its header are repeated at the end of the disk, so it
can be reconstructed if a hardware or software error wipes out the start of the
disk. It also provides a checksum to detect inadvertant modification of the
table.
Unfortunately I don't have the URL for this paper. All I have is pages 309-313
of something titled "Extensible FIrmware Interface Speicification", version
1.02, dated 12/12/00.
(*) Globally Unique IDentifier, also called Universally Unique ID/UUID
--
Barry Gold
Public Key signature: BA 2A 50 53 BC 6E 9A DB 9F 25 5B 13 1A B2 47 12
Filk Hall of Fame, 1997. Interfilk guest, Ohio Valley Filk Fest, 2000.
The truth is out there. It's just not indexed very well.
I don't make policy for Sun.
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