RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread John Zantey


/me remembers the days of 'bit-copying' a disk.. bit by bit, sector per 
sector, track by track, etc... through our own bit of asm (through dos 
debug) or if we were lucky enough C.

Even if the program was 15Kb (mid 80's) the whole disk would be copied in 
its entirety...
Hence we could have our own 'backups' on the likes of pitstop (which boot 
strapped the PC into the game)...

Upon viewing the disk on the normal OS (Dos back then for me) the disk was 
blank...

I think the Technolohy then was called 'boot holes', and 'laser holes' 
where, as Jill said, the manufacturers would put a special type of error on 
the disks...


 >From: Jason Rennie [mailto:[EMAIL PROTECTED]]
 >Is there a way to convince dd to copy the disk bad secotry and all ?
Not without severely modifying the hardware, getting in at the analog level.

>Also why would that stop a cdburner from even seeing a disk in there ?
If the bad sector is in the disk header, or as was suggested, a dirty lens.
Otherwise, I don't know.

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RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread Jason Rennie

> If the bad sector is in the disk header, or as was suggested, a dirty lens.
> Otherwise, I don't know.

Hmmm  Well i'm pretty sure it isn;t a dirty lense, as other cd's burn
ok, and everything else seems to function fine.

Jason



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RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread Umar Goldeli

> >Is there a way to convince dd to copy the disk bad secotry and all ?

Or you can do what I did and have a hated 200 Meg M$ partition and boot it
for the sole use of one program: CDRWIN -> http://www.goldenhawk.com/

It'll do the job.

On another note - if anyone can point me to something Linux based that
will do the same - please do - so I can free my 200 Megs and get rid of my
sole Macroturd dependency.

//umar.



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RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread Jill Rowling

>From: Jason Rennie [mailto:[EMAIL PROTECTED]]
>Is there a way to convince dd to copy the disk bad secotry and all ?
Not without severely modifying the hardware, getting in at the analog level.

>Also why would that stop a cdburner from even seeing a disk in there ? 
If the bad sector is in the disk header, or as was suggested, a dirty lens.
Otherwise, I don't know.

___
Jill Rowling
Snr Design Engineer & Unix System Administrator
Electronic Engineering Department, Aristocrat Technologies Australia
3rd Floor, 77 Dunning Ave Rosebery NSW 2018
Phone:  (02) 9697-4484  Fax:(02) 9663-1412
Email:  [EMAIL PROTECTED]
 


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RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread John Wiltshire

From: Jason Rennie [mailto:[EMAIL PROTECTED]]
>
>Hi all,
>
>This is more of a technical hardware question, rather than a 
>linux centric
>one, but i dont think it is off-topic for the slug list.
>
>I was trying to make a back up copy of a game cd i have (Roller Coaster
>Tycoon specifically), and when the disk is put in the burner, 
>and tried to
>be accessed from xcdroast (and adeptec easy cd creator as well i might
>add) it says that there is no cd in the drive. But of course 
>the cd runs
>fine from the cdrom. 
>
>When i tried to get around this with a dd, it choked a couple 
>of tracks in
>and died.
>
>Any idea what has been done to this CD to make it work like this ?

If the CD doesn't work from CDR but works from the CDROM outside of a
"burning" program then run a cleaner through your CDR - it's probably got a
dirty lens or something.

If it only fails when you are trying to copy it then there is probably a bad
sector on the disk somewhere.  Do a quick search on the web - there's
usually good advice somewhere on how to create backup versions of disks.

John Wiltshire


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RE: [SLUG] CD Burners vs CDROMs

2000-09-24 Thread Jason Rennie

> In the mid 1980's, the way you used to protect software from being copied
> was to deliberately write a bad sector to the disk using special hardware.
> Your game software would check for the existence of this bad sector, and not
> run properly if the sector was good.
> Similarly, if you tried to copy the disk, you couldn't copy the bad sector
> on standard hardware.

I was concerned that might be the case.

Is there a way to convince dd to copy the disk bad secotry and all ?

Also why would that stop a cdburner from even seeing a disk in there ? 

Jason



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