Re: [LUG] Disk Corruption - HEX - A blast from the past.

[Paul Sutton <zen14920@xxxxxxxxx>]

Hex editing, I remember the old speccy and typing in loads of hex, from 
the magazines to write programs, I even hacked the program so it would 
display the checksum of what I entered, a) to check for typing errors 
and b cos the mag made mistakes with checksums,

I spent a whole day coding with basic  and some hex, and ended up with a 
program that ran for about 10 seconds (drawing part of a grid), then 
crashing, thankfully I saved the program, but it was really annoying.

Another of their hex editors started at address 32000 and took up the 
same part of memory as the programs being typed in, I saw that myself, 
but the magazine editors failed to,  reader programs, for you.  Most wer 
e excellent,

of course the how to hack course, that ran for ages, was nearly pure 
machine code, hex etc.  I never ventured in to that as I did not have a 
dis assembler, and other tools.

Moving on hex editors are good for getting doom 3 to work under XP, of 
course I now downloaded the Linux version.

Learning to use a hex editor could be useful one day however, just be 
careful.

Paul



Steve Ellis wrote:
> Hex editing all sounds a bit intense.
>
> I don't really mind if I have to re-install everything again I just
> have a few files on the disk I would like to get off 1st.
>
> I did tyr using the Knoppix & Mepis live CD's as they both mount all
> windows & linux volumes automatically. The plan was to simply copy the
> data from linux to windows then rebuild linux. Howvever when clicking
> on the linux volume it just errors & refuses to open.
> Is there some kind of disk check I can run within these CD's that will
> check/repair the volume.
>
> Thank you
> Steve
>
> On 7/22/05, John Daragon <john@xxxxxxxxxx> wrote:
>
> > Steve Ellis wrote:
> >
> > > Hello
> > >
> > > I have managed to some how corrupt my Linux drive.
> > >
> > > I shut down out of linux then the next time I booted it failed to load
> > > the GUI & was saying about running fsck. Which I did but it made no
> > > differnce.
> > >
> > > Now it doesn't even get that far grub starts to load then I get:
> > >
> > > Grub Loading, please wait
> > > Error 17
> >
> > I'm afraid that might be a very sick disk. Grub appears to be
> > complaining that it doesn't recognise the partition type...
> >
> > From :
> >
> >  http://www.gnu.org/software/grub/manual/grub.html#Troubleshooting
> >
> > 17 : Cannot mount selected partition
> >     This error is returned if the partition requested exists, but the
> > filesystem type cannot be recognized by GRUB.
> >
> > You might be able to connect this disk to another linux box or boot from
> > an install/recovery disk and use something like
> >
> > http://www.stud.uni-hannover.de/user/76201/gpart
> >
> > If the worst comes to the worst, you could attach the disk to another
> > box, dd it to an image file and poke around with a hex editor...
> >
> > Which isn't pleasant, but has saved a disk for me before now.
> >
> > jd
> >
> > --
> >
> > John Daragon                                          john@xxxxxxxxxx
> > argv[0] limited
> > Lambs Lawn Cottage,  Staple Fitzpaine,  Taunton,  TA3 5SL,  UK
> > v +44 (0) 1460 234068   f +44 (0) 1460 234069   m +44 (0) 7836 576127
> >
> >
> >
> > --
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