Date: Thu, 28 Jan 2010 13:26:24 +0100 From: Dimitry Andric <dimitry@andric.com> To: Robert Noland <rnoland@FreeBSD.org> Cc: freebsd-stable@freebsd.org, Brooks Davis <brooks@freebsd.org>, Dan Naumov <dan.naumov@gmail.com>, freebsd-questions@freebsd.org, John Baldwin <jhb@freebsd.org> Subject: Re: booting off GPT partitions Message-ID: <4B618270.3050309@andric.com> In-Reply-To: <1264680406.2869.72.camel@balrog.2hip.net> References: <cf9b1ee01001270845j772d5524tbc2cbd53e70890a7@mail.gmail.com> <201001271627.37955.jhb@freebsd.org> <4B60CBFA.4050601@andric.com> <20100128022349.GB46919@lor.one-eyed-alien.net> <1264680406.2869.72.camel@balrog.2hip.net>
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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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