Re: growisofs can't handle write speed
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Andy Polyakov wrote:
|> I've got a problem with dvd+rw-tools (version 5.21.4.10.8-1)
|> on amd64, gcc3-4:
|>
|> If I try to write an 8x DVD-R (Verbatim), then the writer
|> (LG GSA-4082B, firmware A208) starts with 4x as expected,
|> but later it drops to some arbitrary value (about 2x).
|> After a while it goes up to 4x again, but it never reaches
|> the promissed 8x.
|
|
| Keep in mind that if system for whatever reason can not maitain data
| flow at required rate, unit will have to take idle revolutions and
| depending on firmware implementation performance loss can be as abrupt
| as you describe.
|
According to Verbatim's service rep their medias simply
don't work very well with LG's GSA-4082B. Of course he
has blamed LG for that. But to be sure I will avoid both
LG drives and Verbatim medias for the future.
|> Below you can find a sample session.
|>
|> Writing the old Verbatim DVD-R 4x medias was never a problem.
|> If I use "growisofs -speed=4" then there is no problem with
|> the 8x medias, either (except for the lost performance).
|
|
| Given the speed descriptors presented below you should try -speed=1 to
| tell you unit to limit recording velocity at 4x for 8x media...
|
I did not know the problem with -speed=1 vs -speed=4.
For the next DVD to write I will try -speed=1.
Many thanx
Harri
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