On 4/30/07, Mark Cassino <[EMAIL PROTECTED]> wrote: > In order to add the 4 usb drives, I had to add an external HUB. What > does the hub do to throughput to the drives? I'm guessing that if all 4 > of the drives are active, that the throughput for each drive will be cut > by 1/4th (compared to if it was hooked up directly to the computer.) But > if only one drive is active (more likely the case) then does it enjoy > full throughput? What happens if all 4 drives are turned on, but only > one is actively transferring data?
You'll get pretty close to "full" throughput with just one drive active on the hub. Something to remember about USB though, is that there is a lot of overhead in the data transfer, and you're never going to get the rated transfer speed over the bus (55mbits/second for USB2.0) for large-scale transfers. If the DVD recorder isn't fast enough to saturate the bus, you're golden. If you REALLY want good throughput, get a 4-port USB add-on card, and plug each drive into its own port. Or go firewire. My USB/firewire DVD writer will only burn at 8x on USB, but it'll do full 16x on an FW400 connection. -Mat -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
