Re: DVD Compatiblity issue
>From: James Finnall <james@finnall.net>
>I was going to work with the -speed option tonight anyway. It was
>taking too long for the job to complete as it was. A 2.4x DVD+RW
>will burn 4.2 GBytes in 22 minutes. Here a 4x DVD-R was taking
>28 minutes and the reported speed was 4x at the beginning. I think
>the idea here is that it should take less time, not longer. So I
>tried using -speed=4 and it still took 28 minutes. Here the
>reported speed was 4.1x though. This recording time would seem to
>me to be closer to 2x speed. The "write" LED is illuminated
>constantly so I do not think there are any buffer under-runs that
>would account for the slower performance. However, in regard to
>the original problem, since the -speed=4 apparently did not really
>work but the media appears to be fully readable by all my drives.
>So it may be that the media yesterday was a defective piece of
>media that had problems in the high speed drive units. Since the
>media is a write once type of media, I do not know how I can verify
>or validate that piece of media. On RW media I would simply
>rewrite it and test again.
The cdrecord README clearly states that you _need_ working DMA
in order to write DVDs. If you have burnfree ON the drive just
dramatically slows down.
Jörg
--
EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
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