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From: "Chris H" <bsd-lists@bsdforge.com>
Subject: Re: Boot failure - svn up from this morning
Date: Thu, 02 Mar 2017 22:20:55 -0800
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On Thu, 2 Mar 2017 21:32:39 -0800 "Ngie Cooper (yaneurabeya)"
<yaneurabeya@gmail.com> wrote

> > On Mar 2, 2017, at 21:16, Chris H <bsd-lists@bsdforge.com> wrote:
> > 
> > On Thu, 2 Mar 2017 21:56:38 -0500 (EST) AN <andy@neu.net> wrote
> > 
> >> Hi:
> >> 
> >> I'm having a major problem after updating a 12-current machine today.
> >> After buildworld/kernel/install cycle on reboot I'm getting the following
> >> failure:
> >> 
> >> "/boot/kernel/kernel text=0xb7716f data=0x100548+0x398358
> >> elf64_loadimage: read failed
> >> can't load file '/boot/kernel/kernel': input/output error
> >> can't load file '/boot/kernel/kernel': input/output error
> >> 
> >> OK boot kernel.old
> >> elf64_loadimage: read failed
> >> can't load file '/boot/kernel.old/kernel': input/output error
> >> can't load file '/boot/kernel.old/kernel': input/output error"
> >> 
> >> I have never experienced this failure before, and don't know how to
> >> proceed.  Any help recovering from this would be greatly appreciated.
> >> Thanks in advance.
> > 
> > I don't suppose you could post the output of
> > uname -a
> > 
> > and maybe a copy of dmesg(8) could you?
> 
> That would be good, but I don’t know if it’s possible (the OP is noting
> that the boot is broken when executing loader(8)..). -Ngie

Indeed. But that doesn't stop the OP from booting from the
install media. ;-) :-)

--Chris