I sent two mails in the past on this list about recording speed
problems.
I repost it here ..
Hi,
I have a NEC 3500 Dvd Writer.
I have problems with the recording speed.
I tried two different brand of dvd-r (one from princo that is certified
for 4x recording, and one from philips that is certified for 8x), but
cdrecord-ProDVD always writes the DVDs at 6x speed.
Here is the output of the program; tell me if I can supply additional
debugging data.
newdeal:/pub/temp# cdrecord-dvd -dev=/dev/hdc -speed=4 -dao -data
data.iso
Cdrecord-ProDVD-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C)
1995-2004 Jörg Schilling
Unlocked features: ProDVD Clone
Limited features:
This copy of cdrecord is licensed for:
private/research/educational_non-commercial_use
cdrecord-ProDVD: Warning: Running on Linux-2.6.10
cdrecord-ProDVD: There are unsettled issues with Linux-2.5 and newer.
cdrecord-ProDVD: If you have unexpected problems, please try Linux-2.4
or Solaris.
scsidev: '/dev/hdc'
devname: '/dev/hdc'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : '_NEC '
Identifikation : 'DVD_RW ND-3500AG'
Revision : '2.17'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Using generic SCSI-3/mmc-2 DVD-R/DVD-RW driver (mmc_dvd).
Driver flags : DVD MMC-3 SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Starting to write CD/DVD at speed 6 in real SAO mode for single session.
Last chance to quit, starting real write 6 seconds.