backup drive bootabel

[Noah]

On Thu, 13 Nov 2003 10:05:04 +0000, Matthew Seaman wrote
> On Wed, Nov 12, 2003 at 02:32:20PM -0800, Noah wrote:
> > 
> > > i) Make the 2nd disk an identical copy to the 1st one.  In this case
> > > should the 1st drive go AWOL, you would have to open the case and
> > > either remove the first drive or modify the jumpering on the disks to
> > > swap their order on the bus.  You will need to mark the FreeBSD slice
> > > bootable in the disk partition label by running:
> > > 
> > >     # boot0cfg -B -b /boot/mbr -s 1 da1
> > 
> > 
> > okay this is the command I was Looking for but I am arriving at an error:
> > 
> > # boot0cfg -B -b /boot/mbr -s 1 da1
> > boot0cfg: /boot/mbr: unknown or incompatible boot code
> > 
> > I think the partitions are about the same so I am not clear why this is
happening.
> 
> Hmmm... What FreeBSD version are you using?  I had assumed 4.x,
> because that's what I'm using.  It may well be the case that the
> sample mbr has been moved somewhere else in the filesystem.
> 
> Checking the fdisk(8) and boot0cfg(8) man pages for clues doesn't
> confirm that though.
> 


Hi there,

I am using FreeBSD 4.8 Stable

# boot0cfg -B -b /boot/mbr -s 1 da1
boot0cfg: /boot/mbr: unknown or incompatible boot code
# ls -l /boot/mbr
-r--r--r--  1 root  wheel  512 Aug 24 14:26 /boot/mbr


so I am not clear what the issue is here?

the disk is a little bit of  a different size with different partition sizes.
 woudl that Make a difference.  what esle can I check here?

- Noah


> The mbr should be a 512 byte file generated from the assembler 
> sources in /usr/src/sys/boot/i386/mbr
> 
> 	Cheers,
> 
> 	Matthew
> 
> -- 
> Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
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