Michael Dexter <[EMAIL PROTECTED]> wrote: > >>I was experimenting with the GRUB bootloader and would now like to > >>remove it. Something went wrong and I must now use a bootable CD > >>that gives me an option to "boot to the first partition" and the > >>system boots fine. > >> > >>man bsdlabel gives: > >> > >>Installing Bootstraps > >> If the -B argument is specified, bootstrap code will be read from the > >> file /boot/boot and written to the disk. > >> > >>Assuming that this affects the mbr of the who drive, I tried: > >> > >>localhost# bsdlabel -B /dev/ad0 > >>localhost# bsdlabel: /dev/ad0: no valid label found > >> > >>No problem, let's try the root partition: > >> > >>bsdlabel -B /dev/da0s1a > >> > >>No error, it blinked the hard drive activity light and appears to > >>have done something but alas, it still reports a GRUB error 21 > >>rather than given any sign of the FreeBSD loader. > >> > >>Any pointers to the rescue/install procedures applicable to this? > > > >Did you use fdisk to check and see if the first slice is marked as > >active? Here's a sample from one of my systems: > > > >Media sector size is 512 > >Warning: BIOS sector numbering starts with sector 1 > >Information from DOS bootblock is: > >The data for partition 1 is: > >sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) > > start 63, size 10474317 (5114 Meg), flag 80 (active) > > beg: cyl 0/ head 1/ sector 1; > > end: cyl 651/ head 254/ sector 63 > >The data for partition 2 is: > >sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) > > start 10474380, size 10458315 (5106 Meg), flag 0 > > beg: cyl 652/ head 0/ sector 1; > > end: cyl 1023/ head 254/ sector 63 > >The data for partition 3 is: > ><UNUSED> > >The data for partition 4 is: > ><UNUSED> > > > >note the flag 80 in the first entry. > > The results appear similar: > > localhost# fdisk ad0 > ******* Working on device /dev/ad0 ******* > parameters extracted from in-core disklabel are: > cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) > > Figures below won't work with BIOS for partitions not in cyl 1 > parameters to be used for BIOS calculations are: > cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) > > Media sector size is 512 > Warning: BIOS sector numbering starts with sector 1 > Information from DOS bootblock is: > The data for partition 1 is: > sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) > start 63, size 81915372 (39997 Meg), flag 80 (active) > beg: cyl 0/ head 1/ sector 1; > end: cyl 1023/ head 254/ sector 63 > The data for partition 2 is: > sysid 131 (0x83),(Linux native) > start 81915435, size 61432560 (29996 Meg), flag 0 > beg: cyl 1023/ head 255/ sector 63; > end: cyl 1023/ head 254/ sector 63 > The data for partition 3 is: > sysid 130 (0x82),(Linux swap or Solaris x86) > start 143347995, size 12948390 (6322 Meg), flag 0 > beg: cyl 1023/ head 255/ sector 63; > end: cyl 1023/ head 254/ sector 63 > The data for partition 4 is: > <UNUSED> > localhost# > > On a related note, once working, how does one configure the FreeBSD > loader to give the Linux partition as an option? It seems to have > happened "automagically" in the past.
Are you sure you are talking about the boot loader, not the boot manager? I'd say boot0cfg is what you need. Fabian -- http://www.fabiankeil.de/
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