Any free CD checkers out there?

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Archived from groups: rec.games.computer.ultima.dragons (More info?)

Actually, I don't even know if there's CD checkers, free or otherwise.
You know, like the old Norton and PC Tools disk checkers.

I downloaded some thing once that someone else on another network was
using -- 2 or 3 years ago -- and tried it on a CD that I knew was
garbage and wouldn't read. The checker didn't find a thing so I've
not much trusted them.

But this is 2 or 3 years later and maybe something better exists at
this point in time? I've just been doing simulated burns, images or
just copying files, none of which do I truly trust. I just got a hold
of a CD with a magnitude of stratches -- doing simulated burns with 2
burners went OK, and copied the files OK, the image maker had errors,
but then, it seems to do that a lot (and then sometimes will still
read the image just fine). I haven't yet tried installing it (which
is waiting until I get offline), but I certainly don't want to have to
play this game *right now* all the way through just to make sure this
CD is OK.


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[Guest]

Archived from groups: rec.games.computer.ultima.dragons (More info?)

On Mon, 15 Aug 2005 21:30:47 -0400, erimess wrote:

>Actually, I don't even know if there's CD checkers, free or otherwise.
>You know, like the old Norton and PC Tools disk checkers.
>
>I downloaded some thing once that someone else on another network was
>using -- 2 or 3 years ago -- and tried it on a CD that I knew was
>garbage and wouldn't read. The checker didn't find a thing so I've
>not much trusted them.
>
>But this is 2 or 3 years later and maybe something better exists at
>this point in time? I've just been doing simulated burns, images or
>just copying files, none of which do I truly trust. I just got a hold
>of a CD with a magnitude of stratches -- doing simulated burns with 2
>burners went OK, and copied the files OK, the image maker had errors,
>but then, it seems to do that a lot (and then sometimes will still
>read the image just fine). I haven't yet tried installing it (which
>is waiting until I get offline), but I certainly don't want to have to
>play this game *right now* all the way through just to make sure this
>CD is OK.

This came up recently on a couple of the forensic mailing lists and the
two tools that got recommended were CDRoller and IsoBuster.

What I do after burning a disc is to try copying back the data on one or
more other drives. Also keep an eye on the times required to copy the
files - if it's longer than expected that probably means the drive's crc
function is working hard to read error-ridden files.

Of course, for the most crucial stuff I make more than one copy too.

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