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Re: Low burning speed


> The main question is why does the system in question
> discriminate DVD+RW in particular.

That would be explainable by faulty firmware
which switches speed too early.

But why does it work with full speed when
cdrecord is used ?
Especially with DVD+RW it is not very likely
that any SCSI command before writing
would influence the drive as observed by Tomasz.
The drive only announces two speeds.
None of them is below 6x.
So growisofs should be unable to make it run slower.

That's why i propose a test with cdrskin.
(Elsewise growisofs is at least as capable with
DVD as is cdrskin.)

I forgot to propose a test with plain operating
system driver:
  time dd if=/dev/zero of=/dev/hdc bs=1M count=1000

The measured time and the size of 1000 MiB would
allow to compute the average speed.

Have a nice day :)


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