[ltp] DVD not working

[Matt Graham]

On Friday 19 January 2007 15:01, after a long battle with technology, 
Richard Neill wrote:
> Matt Graham wrote:
>> Since the OP said the drive would read but not write CD-RW media,
>> it's probable that he's not using a type of CD-RW that the drive
>> can write. There are at least 4 different types of CD-RW media.  See 
>> what your drive supports with cdrecord -prcap , use appropriate 
>> media. 
> 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.) 

Also, cdrecord -prcap won't report which types of CD-RW will work in all 
cases.  It's apparently a drive thing; older drives may not report the 
info but newer ones will.

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