[parted-devel] [PATCH 0/4] Add ability to set GPT PMBR boot flag

Phillip Susi psusi at ubuntu.com
Mon Jan 30 16:22:11 UTC 2012


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On 1/30/2012 10:51 AM, Elliott, Robert (Server Storage) wrote:
> A change to the UEFI specification could be proposed in the UEFI 
> Forum.  The partition described by the PMBR is bogus, though, so 
> marking it as bootable seems risky; what's in that area is not 
> bootable in the legacy BIOS method (i.e., loading the first
> logical block of the partition and executing offset zero as x86
> code).

It isn't the bios that does that though; it is the Microsoft MBR boot
code.  As long as we aren't putting that in the PMBR then it wouldn't
be a problem, but since the UEFI guys decided to say no boot flag in
the spec, then it could be a problem.

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