[ltp] DVD not working

Jon Escombe linux-thinkpad@linux-thinkpad.org
Sat, 20 Jan 2007 11:39:48 +0000


Richard Neill wrote:
> 
>>> However, media rated for 32x can still be written (at lower speed) 
>>> with a 4x drive?  Are you saying that there exists any combination of 
>>> CD-RW drive media which cannot burn at all, not even at 1x speed?
>>
>> Absolutely.  If you have an old CD-RW that only writes at 4x, and 
>> newer CD-RW media that supports 8x writing speed, try to write the 
>> newer media in the older drive.  It'll fail miserably, and cdrecord 
>> should give you appropriate error messages in that case.  I've had 
>> this happen to me at least once.  This is because faster CD-RW media 
>> require different combinations of speed and laser power from the drive 
>> and laser than slower media.  (Strange, no good tech data on 
>> PickyWeedia for this particular bit.) 
> 
> Now, that is most interesting. I thought that the worst-case was a 
> fallback to 1x speed. Is this also true for CD-R media, or is it only 
> CD-RW that is this picky?
> 
> 
> Richard

I think this is just a CD-RW bug in certain versions of cdrecord (the 
default version in FC5 has this problem). Compiling from current sources 
it's ok, and there's a patch for older versions on the debian bug list - 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=334677

Regards,
Jon.