cannot boot 5.3 after power failure - major bug?

[Abu Khaled]

On Tue, 22 Mar 2005 19:32:41 -0800 (PST), stheg olloydson
<stheg_olloydson at yahoo.com> wrote:
> Hello,
> 
> While testing 5.3, I deliberately cut power to the box and
> powered up. Much to my surprise, I receive the following error:
> 
> error 16 lba
> invalid format

error 16 lba = 0x10  Uncorrectable CRC/ECC error

> 
> FreeBSD/i386 boot
> Default: 0:ad(0,a)/kernel
> boot:
> No /kernel
> 

Yup you did it the booting process can't find the kernel to boot.

> FreeBSD/i386 boot
> Default: 0:ad(0,a)/kernel
> boot:
> 
> The disk is/was formatted as UFS2 (dangerously dedicated) with
> softupdates. If I enter a command, nothing happens:
> 
> FreeBSD/i386 boot
> Default: 0:ad(0,a)/kernel
> boot:fsck -y
> 

You can enter commands relevant to the booting process it is not a
shell or something like that.

> FreeBSD/i386 boot
> Default: 0:ad(0,a)fsck
> boot:
> 
> If I enter a question mark, I get a listing of the root
> filesystem's contents. (If the disk format were truly unknown,
> how is this possible?)

A question mark "?" Give a short listing of the files in the root
directory of the default boot device, as a hint about available boot
files.

> This problem appears to be identical to the one posted by cell
> on 3/14/05, so this would seem to be a repeatable problem.
> Because this is a test box, I could just flatten it and
> reinstall, I would rather do a graceful recovery. Any
> suggestions on how to accomplish this would be appreciated.
> Note: Any suggestions involving using Release Disc 2 are
> problematic. For some reason, the iso will not burn; the process
> hangs immediately. I downloaded it from four different sites,
> including ftp.freebsd.org with identical results. (The other
> three disc images burn correctly.)
> 
> Thanks for your time,
> 
> stheg
> 

Well you can try to boot manually it may work. type the following at
the boot prompt

0:ad(0,a)/boot/loader
OR
0:ad(0,a)/boot/kernel

If it works the you might have a chance to fix the problem. Somehow I
seem to have forgoten what to do next. I'll check the handbook !!!

-- 
Kind regards
Abu Khaled