From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joshua Isom > >Redirected from freebsd-questions after no reply. > >I currently have an SATA DVD-RW drive for my computer. I have to boot
>using a CURRENT kernel to get the drive recognized, and dmesg lists it >as running at 3.3MB/s. Running mplayer -dumpstream gets around 3 megs >a second. Copying off a data dvd gets about the same. But I recall >reading about playing a dvd before trying to get the data off of it >when using dd, and it seems to work. But the odd part is, it can get >up to 20 megabytes a second. Does anyone know how to get the higher >speeds all the time? What you're probably seeing is a feature of how modern optical drives work. Unlike the "4x" drives of old, the drive does not speed up or slow down the disc based on the position of the head, instead they maintain a fixed rotation speed. Because of this, the pits on the edge of the disc move much faster than the ones near the center of the disc. As you write to the disc you will see your speed increase as the laser gets closer to the edge. Of course the drive manufacturers advertise the speed of reading/writing the outermost track when selling the drive. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
