Samson Lee <[EMAIL PROTECTED]> wrote: > Hmmmm.. Just to confirm, are you also using cdrecord-prodvd > 2.01b31 with LG GSA4167? Or are you using one of the > 'unofficial' dvd patches?
Unofficial because it works flawlessly with the GSA-408x and GSA-416x series. > The drive is on secondary master. The hard drive with the > .iso is on secondary slave. All devices are running udma2. Bam! That's your problem. You will run into a noticable performance issue when you are doing DMA from one device to another on the same channel. Especially from the all-important latency aspect. And that's assuming the ATA v. ATAPI devices and their different vendor/model quirks aren't already in-fighting and reseting the ATA bus (which is detrimental to performance). Trust me on this, put each device on their own channel, and you will avoid performance issues. You should _only_ use the master/slave relationship for PIO (which is slow and CPU intensive), and _never_ for DMA -- or in the worst case, never for transfers occurring from both devices on the same channel simultaneously. ATA is not SCSI. It does _not_ do device-to-device transfers. One ATA device must take control of the bus, setup the registers for transfer, transfer to memory and give up the bus -- while the other device then does the same. The acquisition of the bus is the main issue -- especially when data is trying to be fed to the recorder in real-time, while the HD is trying to transfer into memory. > # hdparm -i /dev/hdc > /dev/hdc: > Model=HL-DT-ST DVDRAM GSA-4167B, FwRev=DL10, > ... > UDMA modes: udma0 udma1 *udma2 > AdvancedPM=no > Drive conforms to: device does not report version: > * signifies the current active mode And "hdparm -i /dev/hdd"? -- Bryan J. Smith Professional, Technical Annoyance [EMAIL PROTECTED] http://thebs413.blogspot.com ---------------------------------------------------- *** Speed doesn't kill, difference in speed does *** _______________________________________________ Dvdrtools-users mailing list Dvdrtools-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/dvdrtools-users
