> > 4) The pbr code now reads the rest of the 8k 'boot code' area at the > > start of the partition > This means "MBR partition", right?
I think "MBR_PTYPE_NETBSD" partition in the Master boot record: http://nxr.NetBSD.org/xref/src/sys/arch/i386/stand/bootxx/pbr.S#156 > And this "boot code" is what is called "primary boot" in BSD terminology, > right? : > > this is the rest of bootxx_xxxfs. > What do you mean by "rest of"? See my first post: --- sector 63: pbr.S (first 512 bytes bootxx_ffsvN) sector 64: NetBSD disklabel (installboot(8) skips here) sector 65-78: rest of bootxx_ffsvN sector 79-: UFS superblock --- > > 5) The bootxx code now tries to load the 'boot' program from filesystem, > > it checks the following places for a filesystem: > I don't quite get why it has to look for a filesystem. I thought > (and in only 8k it must have) the block numbers of /boot encoded > into it by installboot? No. On x86 (and alpha, pmax etc.), primary bootxx_Xfs recognizes filie system as its name, unlike old sun ports. (no bbinfo in src/usr.sbin/installboot/arch/i386.c) > > a) the start of the partition > This again means "MBR partition", I suppose? It seems so: http://nxr.NetBSD.org/xref/src/sys/arch/i386/stand/bootxx/boot1.c#76 --- Izumi Tsutsui
