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Re: Debian 8 and Debian 9 Dual Boot

On Wed, 29 Nov 2017 15:37:46 -0500
Dan Norton <dnorton@mindspring.com> wrote:

> On 11/29/2017 01:36 PM, Felix Miata wrote:
> > Dan Norton composed on 2017-11-29 13:07 (UTC-0500):  
> >> After POST, the following appears:
> >> [...]
> >> PXE-E53: No boot filename received
> >> PXE-MOF: Exiting PXE ROM.
> >> ERROR:No boot disk has been detected or the disk has failed.  
> > It tries to PXE boot because it finds no bootable storage device:
> > there is no active partition, or no boot code in the MBR sector of
> > the device that you expect to boot. Installing Grub to a partition
> > leaves the MBR untouched, so it might not yet contain anything
> > other than partition data. The partitioner I use installs MBR code
> > automatically. The one in the installer may have needed to have
> > this step explicitly asked for. It can be added post-install
> > manually. 'man install-mbr'. 
> >> Isn't that because the primary is not mounted to /boot?  
> > Mounting happens well after the point you have reached.
> >  
> Nothing found for "man install-mbr" but web search yields "How to 
> Install Grub Onto Your MBR [1] which I will try.
> [1] http://www.av8n.com/computer/htm/grub-reinstall.htm

You've said that you can boot your system with the aid of a boot
utility disc: that bypasses a lot of trouble, and you should be able to
go directly to step 8 from within your working system. It's harder to
do if you have to work from a different environment.

As I said, I believe you should also do update-grub, which will
certainly do no harm. You don't yet know that grub is configured with
the necessary information for an unaided boot.

Note that grub2 is still a work in progress, and many of the boot
problem tutorials you find on the Net are no longer completely
accurate. This one should be OK, I think. It's usually worth adding
'debian' to your search keywords, if you turn up something on the
debian.org site there's a good chance it's up to date.


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