On Tuesday 04 July 2017 20:55:25 Paul de Weerd wrote:
> On Tue, Jul 04, 2017 at 08:34:56PM +0200, Stefan Wollny wrote:
> | Hi there!
> |
> | Sorry if this may sound like a rather stupid question:
> | (Referencing the examples section of man installboot(8))
> |
> | Can s.o. verifiy that instead of
> | # installboot sd0
> |
> | it is equally safe to issue
> | # installboot <DUID>
> | (the DUID itself, of course)?
> |
> | My system is fully encrypted with sd1 usually being the (unencrypted)
> | boot disk - but if external USB disks are attached that number seems not
> | to be quaranteed.
>
> simply `installboot $(df -h / | grep -o -E '[ws]d[0-9]+')`
>
> There's definitely a difference between using the device name and the
> DUID:
>
> [weerd@pom] $ doas installboot -v `awk -F. '/ \/ / {print $1}' /etc/fstab`
> Using / as root
> installing bootstrap on /dev/rsd14c
> using first-stage /usr/mdec/biosboot, second-stage /usr/mdec/boot
> 5c0d9a38cc895a7d: softraid volume with 0 disk(s)
> 5c0d9a38cc895a7d: installing boot loader on softraid volume
> /usr/mdec/boot is 6 blocks x 16384 bytes
>
> [weerd@pom] $ doas installboot -v $(df -h / | grep -o -E '[ws]d[0-9]+')
> Using / as root
> installing bootstrap on /dev/rsd14c
> using first-stage /usr/mdec/biosboot, second-stage /usr/mdec/boot
> sd14: softraid volume with 1 disk(s)
> sd14: installing boot loader on softraid volume
> /usr/mdec/boot is 6 blocks x 16384 bytes
> sd0a: installing boot blocks on /dev/rsd0c, part offset 144
> master boot record (MBR) at sector 0
> partition 3: type 0xA6 offset 64 size 1953520001
> /usr/mdec/biosboot will be written at sector 64
>
> So if I were you, I'd continue using the device for now.
Note that this will only apply in the case where the disk is a bootable
softraid volume - in the non-softraid case either is fine and the DUID is
likely preferable.
