Date: Fri, 16 Jan 2009 01:10:42 +0100 From: Dimitry Andric <dimitry@andric.com> To: Marcel Moolenaar <xcllnt@mac.com> Cc: Randy Bush <randy@psg.com>, Luiz Otavio O Souza <lists.br@gmail.com>, George Neville-Neil <gnn@neville-neil.com>, Ben Kaduk <minimarmot@gmail.com>, current@freebsd.org Subject: Re: GEOM and moving to CURRENT from 7.1 Message-ID: <496FD082.6030509@andric.com> In-Reply-To: <DBB310AB-75BF-4BF7-AA35-63ADBD0B66B6@mac.com> References: <FC3D3CF7-091B-4ECF-BE38-6C7751C20994@neville-neil.com> <alpine.BSF.2.00.0901112002080.3696@ibyngvyr.purzvxnyf.bet> <496D0364.2060505@psg.com> <47d0403c0901131335h46e7b151p3768de9a3e2c2027@mail.gmail.com> <EC370904A7B74B93887C79E120CA2835@adnote989> <085BEE07-BAE5-4A45-A14D-9587987FAA5C@mac.com> <496F44FA.1070004@andric.com> <48C1C477-B7BE-43B0-AC57-9DEB7BF9AA88@mac.com> <496F7347.4060007@andric.com> <A8E47805-888E-4282-8623-72A65B593D47@mac.com> <496F8D8A.1060508@andric.com> <BC6ACB2A-CBC5-428B-8749-999B48B2D1C8@mac.com> <496F928F.6010807@andric.com> <DBB310AB-75BF-4BF7-AA35-63ADBD0B66B6@mac.com>
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On 2009-01-15 20:55, Marcel Moolenaar wrote:
> Thanks *very* much for testing! It's important that we
> get the details right, so that we can consider adding
> code to help in the migration and fix whatever is broken.
In sysinstall, a standard installation writes the disks like so:
usr.sbin/sysinstall/install.c: installStandard()
usr.sbin/sysinstall/install.c: installCommit()
usr.sbin/sysinstall/install.c: installInitial()
usr.sbin/sysinstall/label.c: diskLabelCommit()
usr.sbin/sysinstall/disks.c: diskPartitionWrite()
lib/libdisk/write_i386_disk.c: Write_Disk()
It looks like Write_Disk() always writes a partition table:
int
Write_Disk(const struct disk *d1)
{
[...]
struct dos_partition *dp,work[NDOSPART];
[...]
for (c1 = d1->chunks->part; c1; c1 = c1->next) {
[... fills dp here ...]
}
[...]
memcpy(mbrblk + DOSPARTOFF, dp, sizeof *dp * NDOSPART);
mbrblk[512-2] = 0x55;
mbrblk[512-1] = 0xaa;
write_block(fd, 0, mbrblk, d1->sector_size);
[...]
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