>From: Markus Plail <[EMAIL PROTECTED]>
>* Joerg Schilling writes:
>>Note that the encoding speed is content dependant. Also note that due
>>to a kernel design bug, Linux does not enable DMA for ATAPI drives if
>>the sector size is != 2048 (as with RAW sector size 2448). This results
>>in a high system load and may cause a buffer underrun even before the
>>estimated maximum speed of the edc library has been reached.
>This is not true, at least not as a general statement. As I reported in
>a newsgroup, you are reading, I was able to burn a data CD with -raw96r
>at 20x speed with my ATAPI CD writer with less than 5% CPU usage with
>your closed source version. AUDIO CDs can be burnt with the same
>options with less than 3% CPU usage even with the open source
>version. So it's rather a bad setup than a general Linux problem. I
>tested this with 2.4.18 and 2.4.20-pre8-ac3, i.e. with the new and the
>old IDE subsystem.
The fact that Linux does not use DMA with ATAPI has ben reported by may people!
Having 3% load is a hint that there is no DMA....
In addition, it may be that Linux does not report the load correctly when doing
PIO to the drive.
If yout load was less than 5%, then you must have a PC with more than 2 Ghz.
It the oad you reported is really correct, then try 1.11a37....
With the new free cdrecord, you should be able to write in 24x with less
than 15% load.
J�rg
EMail:[EMAIL PROTECTED] (home) J�rg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni) If you don't have iso-8859-1
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URL: http://www.fokus.gmd.de/usr/schilling ftp://ftp.fokus.gmd.de/pub/unix
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