booting off GPT partitions
dimitry at andric.com
Thu Jan 28 12:26:15 UTC 2010
On 2010-01-28 13:06, Robert Noland wrote:
> John or Marcel can correct me, but I don't think that this is an issue.
> The bootstrap is located in the pmbr in sector 0 and the GPT headers and
> tables are in sectors 1 - 34. The bootstrap code knows how to read the
> GPT tables and can deal with> 2 tb lba's.
Ah yes, I see it now. It uses EDD packets with the BIOS int 13
interface, which apparently have a 64-bit LBA. This should support up
to 8 ZiB with 512-byte sectors...
OTOH, I have no idea how well most BIOSes actually implement this.
Since many OSes simply don't support anything over 2^32 sectors, I would
not be amazed to find much BIOSes out there that behave the same. Or am
I too paranoid now? :)
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