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Posted by Joerg Schilling on 04/03/07 18:10
In article <TdqQh.92$Sr5.67@newsfe06.lga>, root <NoEMail@home.org> wrote:
>Joerg Schilling <js@cs.tu-berlin.de> wrote:
>> In article <B3VPh.1683$JL3.461@newsfe04.lga>, root <NoEMail@home.org> wrote:
>>>Eamon Skelton <Xnospam@oceanfree.net> wrote:
>>
>>>Burning isn't the problem, but I use cdrecord for -R disks
>>>and growisofs for +R. I don't write to RAM with the computer.
>>
>> Do you use the officiel unmodified cdrecord from
>>
>> ftp://ftp.berlios.de/pub/cdrecord/alpha/
>>
>> or do you use the defectove fork from Debian?
>>
>> If you are in doubt, try out the latest original cdrecord
>> and make sure to install it suid root.
>>
>
>I don't use anything from Debian. I built the version of
>cdrecord from your tgz package. I had been running an
>earlier version 2.01a27. Neither that version nor the most
>recent writes a 16x disk at the rated speed using a Pioneer
>drive. The problem is specifically the Pioneer, since either
There are three possibilities for the problems:
- The pioneer drive ha a firmware bug.
Verify this with running something like:
cdrecord -vv -dummy /etc/passwd
The following data is relevent for what the drive
tells us:
Drive current speed: 10
Drive default speed: 10
Drive max speed : 10
Selected speed : 10
- The machine is missconfigured or has otherwise
problems with DMA speed.
The related output is:
Drive buf size : 1190112 = 1162 KB
Drive pbuf size: 2064384 = 2016 KB
Drive DMA Speed: 35617 kB/s 202x CD 25x DVD
FIFO size : 4194304 = 4096 KB
Here the max DMS speed is ~ 35 MB/s which is
sufficient for 16x DVD.
- The drive turns off DMA for the 'READ BUFFER'
SCSI command.
In case cdrecord's DMA speed test gives too low numbers for
whatever reason, you may try to run:
CDR_FORCESPEED=true cdrecord .....
Also try
cdrecord -force ....
>version of cdrecord will write the disks using an Optiarc
>drive.
What optiarc drive, Sony or NEC?
--
EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jrg Schilling D-13353 Berlin
js@cs.tu-berlin.de (uni)
schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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