Any DVD burner that I (and four other friends) put external on a USB 2.0 bus comes up with "Read/Write Errors". I have a DVD Reader (DVP-106) that plays and read fine on the USB bus, but any burner will not. If I move the DVD burner (Sony 500A or Pioneer A05 or A07) onto the IDE channels, they work perfect. Any ideas what the problem is? I have eleven other devices on the USB bus (Hard Drives, Printers, Scanners, etc.) and wonder if this is causing the burn problem? Thanks for any help!

well, i can't say for shore that the eleven other USB devices is the problem. but i can say it would be a really good place to start your trouble shooting. unplug all of them, then hook up your USB burner and see what happense. it may be a pain in the neck but thats what you got to do. uh by the way. USB is strange like that it lets you hook a lot of things up all at the same time, but if two of them are being used at the same time it could really go crazy. if that dosn't work post back.

yea... hey.. what is the max for usb anyone know?.. I read an article where over 50 items were hooked up through usb and all was reconized... pretty crazy... but yea I think that since for alot of applications that go through usb pull their power through it (even if you have powered usb hubs) I would unhook all that weren't nesesary and try one more time Shuttle AN35N- Ultra AMD 2100+ 1Gb 2100 DDRAM Gforce 5600 128ddr 120 of 7200 HD space Genuine Win XP Pro UV Clear Acrylic Blue case

OK: Removed all USB devices and put a DVD burner on USB. I was able to write a Data DVD. I can't test burning a movie, since there all on the USB Hard Drives. This screwed up my drive letters (except all of the scsi drives), but I am moving DVD burner back to IDE. Can't live without other USB devices. It appears that USB will not multi-task like my SCSI. Someday I will try again with Firewire and see if DVD burner will work on firewire with all of the USB devices running. Thanks for the help!

There is a good reason why new MBs are equipped with 6 USB ports. If devices are on different controllers there is a better chance they will operate without problems.

OtheHill: I do have 6 USB's on Asus Mobo, plus two PCI cards with four USB ports each also (14 usb ports). I tried using external hubs from the mobo, but couldn't get hard drives to run correctly thru a hub (even powered ones). And I counted wrong. I have a Compact Flash/Smart Media reader on USB. Total is 13 usb devices. Funny I can run 15 devices on a single scsi host card and they all work perfectly, and at the same time.

Well USB and Pnp and IRQ sharing are all great advances but the core problem still exists. With the amount of USB devices in your system you most likely are overwelming the USB channels. There are still only so many resources to go around.