On Friday 15 July 2005 03:38 am, Joerg Schilling wrote: > Vasileios Gkanis <[EMAIL PROTECTED]> wrote: > > > > cdrecord has a special option for this case: -immed (see man page) > > > > > > I burned some data (4.3GB) on two discs. The first disc was burned with > > > the "-immed" option and the second disc was not. Unfortunately, the > > > first disc was lost, some of the data can not be read. Both discs were > > > burned at an average speed of ~2x and the maximum speed was ~4x. But, > > > when I used the "-immed" option I burned only 100MB at ~4x, and then > > > the speed dropped to ~2x. When I did not use this option I burned about > > > 500MB at ~4x, and then again the speed dropped to ~2x. Interestingly, > > > the speed increased from ~2x to ~4x when about 500MB were already > > > written on the disc. But before it increased, the hard disk stopped > > > transfering any data, the speed dropped to ~0.1x and stayed there for a > > > couple of seconds, and then it increased to 4x. > > > > > > Do all these make sense? Do you think this is normal? > > > Without any information nobody can help you > > > > > > > > > http://cdrecord.berlios.de/old/private/problems.html > > > > > > Jörg > > > > Yes, you are right, I am sorry about that. Let me start with the very > > basic: OS: Gentoo > > Kernel: 2.6.12_rc6 love-srouces > > Cdrecrotd-Prodvd: 2.01.01 > > Mkisofs: 2.1 > > The DVD disc was a Verbatim 16x DVD-R, and the driver is QSI DVD+/-RW > > SDW-082 (Firmware LX44) with maximum speed 8x. > > The command that I issued (as root) was > > mkisofs -V "Data" -R /home/vasilis/data/ | /root/cdrecord-wrapper.sh -v > > -sao tsize=2276518s -dev=ATA:0,1,0 driveropts=burnfree speed=8 - > > > > The DVD disc was burned without any error, but the burning speed was > > increased to ~4x, for a couple of minutes, and then it decreased to ~2x. > > The hard disk was always transfering data, but when the burning speed > > changed to 4x and then back to 2x, for a couple of seconds the hard disk > > stopped transfering data. > > > > The system is a Centrino at 2Ghz with 512MB RAM, dma is enabled on both > > hard disc and DVD drive. hdparm -tT /dev/hda shows that the maximum > > transfer rate from/to the hard disc is ~30MB/s. > > The system has and IDE controller > > 0000:00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 > > Family) IDE Controller (rev 04) > > which is supported in the kernel. > > > > I do not know if these informations are helpfull, but this is all I got. > > If you want me to send you the output of cdrecord-prodvd -V, I will > > gladly do it. > > I still don't understand. > > I thought you had problems when writing with -immed > > I thought the disk made with -imme was defective. > > Jörg Yes, the disc with the "-immed" option is defective, but I never said that I got any error. My only concern is that I burned the disc at ~2x and only for a fraction of time I burned at~4x. Here is the command that I run
mkisofs -V "Data" -R /home/vasilis/data/ | /root/cdrecord-wrapper.sh -v -sao tsize=2276518s -dev=ATA:0,1,0 driveropts=burnfree speed=8 - and this is with the "-immed" option mkisofs -V "Data" -R /home/vasilis/data/ | /root/cdrecord-wrapper.sh -v sao tsize=2276518s -immed -dev=ATA:0,1,0 driveropts=burnfree speed=8 - bill davidsen: The fifo is about ~100% and the buf is 76% (this is also its maximum value). So, it is not like the fifo is getting empty. Although, when the speed dropped to ~0.5x, the buf. decreased to ~13% and fifo decreased to ~70%. I am in a middle of something, but in a couple of hours I will send you the output from the command that I executed.
