cd-rom won't read new burned Disc 1

[David Curry]

Rick Stevens wrote:

> David Curry wrote:
>
>> Paul M. Bucalo wrote:
>>
>>> On Thu, 2005-02-10 at 14:58 -0500, jim lawrence wrote:
>>>  
>>>
>>>> Hi all,
>>>> I'm helping a friend out to install FC3.  He burned the ISO images on
>>>> his notebook's CD-RW and wants to install FC3 onto a desktop he 
>>>> has. The CD-ROM on the Desktop will not read the CD's.  I had him 
>>>> check the
>>>> burn CD's with his notebook, and the cd's burned fine, so the Fedora
>>>> CD's are fine. What can I tell him about the CD-ROM he has in his 
>>>> Desktop?  Buy a new CD-RW ??
>>>> -- 
>>>>   
>>>
>>>
>>>
>>> This topic comes up a lot. Probably always will.
>>>
>>> CD-RW drives vary in the speed in which they can burn at. Herein lies
>>> much of the problem when trying to read a burned disc in another ROM
>>> device. Some CD-ROM drives are not able to read CD-R's burned at fast
>>> speeds (like over 8X). For this reason, I burn my distro ISO's at 4X
>>> even though my burners are able to burn much faster. Even then I am not
>>> guaranteed to have a disc that can be read on all of my machines. I 
>>> have
>>> four burners and the four will not necessarily read a CD-R burned from
>>> one of the others. This becomes a real pain for me when archiving. :0/
>>> I'm betting he did them at 12X or faster. However, if he did burn them
>>> at 4X and they work on someone else's machine, but not yours, you 
>>> should
>>> consider the possibility that you have the problem, not him.
>>>
>>> HTH
>>>
>>> Paul
>>>
>>>  
>>>
>> I have the same problem on an older desktop machine, Jim.  CDs were 
>> burned at 4x on my FC2 system, but the CD-Rom on the Pentium class 
>> (166Mhz-MMX) will not read the CDs.  (The CD-ROM is supposedly a 4X 
>> drive, but it dates to mid-1990s.)  Based on Paul's input, I would 
>> try a 2X burn  if I could get the machine to boot again.
>
>
> Also remember that older CD ROM drives use a different color laser (old
> used 670nM lasers, newer uses 630-650nM lasers).  The "redder" lasers
> (old) often have problems reading the darker media used on faster CD-Rs.
>
> It isn't necessarily the speed at which it was burned, it's the speed
> capacity of the MEDIA.  Try burning using a media with a lighter color
> at whatever speed you want.  I'll bet it works.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -   Never test for an error condition you don't know how to handle.  -
> ----------------------------------------------------------------------
>
Thanks, Rick.