On 2014/03/07 11:04, Jean-Philippe Luiggi wrote:
> Hi everybody,
>
> I follow "-current" for several years but recently a thing puzzles me.
>
> My "x200" is a dual-boot system ("Seven"/OpenBSD "-current") and since (I
> think) the
> "amd64/i386 installboot" change, each time I upgrade via "bsd.rd", I have to
> generate a new "openbsd.pbr" and copy it to "Seven".
>
> If I miss that, I get an "ERR M" and can't go further.
>
> First I was thinking about changes but I checked code and last modification
> on boot(8) was made 2 weeks ago (I did 2 updates since it).
>
> I used that setup for several years without any need to do that, what do I
> miss here, is it now normal ?
>
> Regards,
>
> Jean-Philippe.
>
>
>
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The location of /boot (second-stage boot loader) is recorded in the
pbr so the 1st-stage can find it.
With the old method of cp + /usr/mdec/installboot, though it wasn't
guaranteed, /boot tended to stay in the same place on disk most of the
time:
# cp boot /; ./installboot -v /boot ./biosboot sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2344
# cp boot /; ./installboot -v /boot ./biosboot sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2344
# cp boot /; ./installboot -v /boot ./biosboot sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2344
# cp boot /; ./installboot -v /boot ./biosboot sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2344
Whereas new installboot tends to shift it around:
# installboot -v sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2344
# installboot -v sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 48, offset 16168
# installboot -v sd1 2>&1 | grep shift
fs block shift 2; part offset 64; inode block 56, offset 2472
Meaning that the pbr must be updated with the new location.
