The speed limit of USB drives appears to be about 20 MB/s under Opensolaris.
My experience with 4 port PCI cards is that they have a single bridge and some sort of internal hub, so the 20 MB/s speed limit is across all of the ports, e.g. two drives connected to a 4 port PCI USB card will each produce approx 10 MB/s throughput. Assuming I understand what is going on, does there exist a 4 port PCI card which actually has four distinct pci-usb bridges? In other words, I am looking for a card where each of the four ports can sustain the 20 MB/s throughput. Right now, I am looking at adding PCI cards not for the ports, but for the speed. The reason is that several USB drives serve as a USB backup pool for the main array. Many thanks, Marty -- This message posted from opensolaris.org
