The problem as I have heard it, is that all hard disk have an internal procedure called thermal recalibration(TR). This, I believe, is a method of allowing the drive to make servo changes to compensate for changes in clearances as the result the thermal expansion/contraction as the drive is used. Some drives (AV drives) are smart about when they perform TR so that they don't recalibrate in the middle of accessing files. Other drives perform TR whenever they feel like it. If TR occurs while transfering files to a CD and the CD-R does not have sufficient buffer capacity to permit continuous writing to the disk, the session will fail. Consequently, the speed of the disk, the TR, the transfer rate, the buffer size, and the speed of the CD-R have to all be checked to assure that buffer under-run does not occur. My $0.02 worth. ________________________________________________________________________________ Paul Goodwin Image Analysis Lab FHCRC, Seattle, WA On Tue, 27 Feb 1996, Todd Kirk wrote: > Hey ..... > We are just about to get a Yamaha 4x CD-R, anyone have one? > Also I want to be able to not only archive pictures but record > video, sound and backup CD's. I was informed to be able to do this, > you need an AV drive (audio visual), I believe it has to do with the > transfer rate and the throughput. To backup CD to CD-R, you need a step > faster on the CD -- 4x CD, 2x CD-R -- 6x CD, 4x CD-R ... ~TODD~ >