Date: Mon, 15 Aug 2011 17:36:46 -0700 From: Kevin Oberman <kob6558@gmail.com> To: "Andrey V. Elsukov" <ae@freebsd.org> Cc: "freebsd-stable@freebsd.org Stable" <freebsd-stable@freebsd.org> Subject: Re: GPT boot blocks, booting and booteasy Message-ID: <CAN6yY1vYyR%2BuhUy-8oNvuVBVcPW5T5yMkUTXADfwhyWJ1rX4=A@mail.gmail.com> In-Reply-To: <4E49430D.10609@FreeBSD.org> References: <CAN6yY1vukPLPV%2BbM%2BBDV_dDaFmiCBGG8BhhiiRrWHmXCa_NFGQ@mail.gmail.com> <4E49430D.10609@FreeBSD.org>
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2011/8/15 Andrey V. Elsukov <ae@freebsd.org>: > On 10.08.2011 07:12, Kevin Oberman wrote: >> I have /boot/pmbr loaded into the PMBR and gptboot into the >> freebsd-boot partition. I'll >> admit that I did this by rote and don't understand how these two files >> interact with the >> UEFI BIOS to get the loader started. I'm not really certain that I >> even need both. >> >> Is it possible to build a "custom" booteasy boot system with boot0cfg >> or some other tool >> so I can select d ifferent bootable partition or my other disk which >> is sliced in the traditional >> fashion? Can anyone point me to any information on how the boot >> process works with GPT? > > PMBR is a simple variant of MBR which does know enough to parse GPT > partition table and how to load bootcode from the "freebsd-boot" > partition. Then gptboot does search bootable UFS partition. > At this time we do not have any =A0bootcodes like booteasy for GPT. > But you can try to use bootme and bootonce GPT attributes (see > gpart(8)). Also you can use grub boot loader. Andrey, Thanks for the response. The 'bootme' and 'bootonce' attributes look to sol= ve some issues. Looks like I might need to have a bios-boot partition to use g= rub, but I may give it a shot. On the whole, the advantages of GPT are such that= I would love to see FreeBSD move to make it the standard partitioning scheme, though I understand this will not be easy until/unless Windows develops ful= l GPT support. Just having more than 4 partitions as opposed to having to sub-partition a = real partition (slice) is very nice. --=20 R. Kevin Oberman, Network Engineer - Retired E-mail: kob6558@gmail.com
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