on 18/09/2011 23:18 Kevin Oberman said the following: > On Sun, Sep 18, 2011 at 2:55 AM, <"Thomas Mueller > <mueller6727"@bellsouth.net> wrote: >> Some more ideas on the new bsdinstaller cross my mind. >> >> Since the way the bsdinstaller would make partitions is unpredictable, at >> least to the uninitiated, and in all likelihood at variance with how much >> space the user wants to allocate, it might be better to offer a roadmap to >> help guide the user to allocating space for FreeBSD using gpart or Rod >> Smith's gdisk. >> >> Also, I can't see the function of the 64 KB boot partition with no file >> system, which does not boot for me, though I can boot the main partition >> using grub2 from the System Rescue CD (http://sysresccd.org/). > > The 64KB freebsd-boot partition is to contain the GPT boot code which > is used by UEFI BIOS in > place of the old MBR used by legacy BIOS. You need to use gpart(8) to > write the GPT boot code to that partition, but I don't know if > bsdinstall does so. It might just write the PMBR that is used for > booting with legacy BIOS. I'll admit that I have not checked. (See the > gpart(8) man page for details on writing the pmbr and gptboot.) I > assume bsdinstall writes both so that AMD64 machines with EFI and > 32-bit systems will both work. This is very different from the old > traditional slice/partition system.
I don't think that we create a GPT boot partition that is going to be used by UEFI BIOS. We use specific "freebsd-boot" partition type, which, I am sure, is unknown to BIOSes. So, as you say, we install PMBR, which will be booted by BIOS, and which will then load the "main boot code" from the boot partition. -- Andriy Gapon _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
