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

Elliott, Robert (Server Storage) Elliott at hp.com
Mon Jan 30 15:51:09 UTC 2012


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).

---
Rob Elliott    HP Server Storage



> -----Original Message-----
> From: parted-devel-bounces+elliott=hp.com at lists.alioth.debian.org
> [mailto:parted-devel-bounces+elliott=hp.com at lists.alioth.debian.org] On
> Behalf Of Phillip Susi
> Sent: Saturday, 28 January, 2012 4:33 PM
> To: Keshav P R
> Cc: parted-devel at lists.alioth.debian.org
> Subject: Re: [parted-devel] [PATCH 0/4] Add ability to set GPT PMBR boot
> flag
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 01/28/2012 02:48 PM, Keshav P R wrote:
> > The issue here is the UEFI spec specifically mentions "boot/active
> > flag should not be set on the 0xEE entry in PMBR. Any firmware
> > that *strictly* complies with the spec will ignore the drive or
> > show errors.
> 
> Ugh, they had to put that in the UEFI spec.  Well that's a good reason.
> 
> 
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