[pchelpers] Re: cyclic redunancy check/ edit data?

G.R. Hanson wrote:
> Adobe reader Error:
> 
> There was an error opening this document. Data error (cyclic redunancy 
> check)
> ***************************************************************************************************
> 
> I purchased some dvd's that are rewritable.
> Someone had sent me 59 Adobe pdf files and I wanted to put those on a 
> dvd and then delete them from my computer.
> They open from the hard drive. 
> 
> Most of them are opening from the dvd.  But some give me this message.
> 
> This is the first time I have done this <put data on a dvd> since I've 
> never had a dvd burner before, so if anyone has any tips or suggestions, 
> please let me know.
CRCs (cyclic redundancy checks) are part of the operating system's way 
of ensuring files are intact and correct.
They are used when checking your hard drive for errors, repairing and 
confirming the integrity of your data.
The message you are getting confirms some of the files you put on DVD 
contain errors.
> So, what am I doing wrong?
To help prevent them you need to do regular disk maintainance on hard 
drives (scandisk etc). Open "My Computer". Right click the desired drive 
(must be writable), select "Properties", then the "Tools" tab. Click the 
"Check Now" button.

However, this does not cover CDs or DVD issues. As removable media have 
become able to hold more information, the surface has become more packed 
and detailed. Now, even a speck of dust or an insignificant scratch can 
make it produce errors or even be unreadable.

To correct this, minor imperfections need to be polished away. There are 
various kits around for this. I found one called "Fixity Disc"
http://www.lomis.com.au/products/product_display.php?prodid=104
There are probably others around like it.
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