Question about installing boot manager in sysinstall
parish at magichamster.com
Mon May 26 13:21:03 UTC 2008
I've got two SCSI drives, da0 and da1. FreeBSD 6.3-STABLE is installed
on da0 and da1 currently has Mandriva Linux on it. The boot manager
being used is Grub.
I now want to replace Linux with FreeBSD 7 but I'm expecting that I may
end up with an unbootable system because da0 (6.3) will still have Grub
but da1 (7) will have the FreeBSD boot manager. Since Grub uses files in
/boot on the Linux partition it won't work as these will have been wiped
On the partition editor screen, select da1, delete the Linux slice,
create a new FreeBSD slice, then 'Q'
At the bootmanager screen, select the FreeBSD boot manager
In the disklabel editor, create the partitions in the slice
OK, that's the new disk configured and I'm now back at the Select Disk
screen. Do I now select da0 (the existing 6.3) and in the Partition
Editor just hit 'Q' without changing anything, then select the FreeBSD
boot manager, and finally, in the disk label editor just hit 'Q' again
without changing anything - especially the NewFS flag!!
Will this install the FreeBSD boot manager on da0 but not touch the
existing partition/slice set up - i.e. it won't trash my 6.3 system?
I've read the Handbook but the example it gives for 2 disks assumes that
you are creating FreeBSD partitions/slices on *both* disks, it doesn't
have an example for just adding an existing disk to the boot manager.
What makes me nervous about doing this is that the boot manager is
installed in the MBR where the partition table lives.
The other option I may be able to use is to run boot0cfg(8) on da0 (6.3
system) *before* installing 7 - or maybe run it on both disks and don't
select a boot manager during the install.
So, what's the best (i.e. safest) way to proceed?
Oh, and before anyone says, yes, I *have* backed up all my data ;-)
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