Hi, > I am curious as to why the actual speed I get happens to be a lot > slower than the nominal one. > If I do not use "hdparm" to set the speed of /dev/hdd to udma2, then > actual speed happens to be even slower. > /dev/cdrom1: "Current Write Speed" is 4.1x1385KBps. > builtin_dd: 2011280*2KB out @ average 2.6x1385KBps
I got a similar slowdown (3.4x rather than 4x) which is clearly due to a lack of filesystem throughput on the input side. My system is a AMD 2600+ with a cheap mainboard and a disk of medium performance. > I am creating the image on the fly, could that make things go slower? Yes and no. If you have mkisofs write into a buffer file and have growisofs write that buffer to DVD you will probably see full speed. But a buffered write will not need less time than a write on the fly because you will need more time buffering than can be saved by full DVD speed. Nevertheless such a buffered write would probably prove that there is no problem with growisofs and the DVD writer. At least it did for me. Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]