ADVANTAGES OF THE TANGO EXPRESS 800
1. It provides a second FireWire 800 data channel. As you can see from the graphs, by connecting one drive to the Tango Express 800 and one to the Mac Pro's built-in FW800 port, our two drive RAID 0 array almost doubled in read speed compared to daisy chaining them on one built-in port. That illustrates the "power" of multiple channels feeding FireWire 800 RAID systems.
If you are capturing SD video from a videocam and storing it on a FW800 storage device, it helps to have each device on a different data channel. The Tango Express 800 gives your Mac Pro that second channel.
2. It works with bus powered storage. We connected the LaCie Big Little Disk (two notebook drives in single enclosure set to HW RAID 0) to the Tango Express 800. It mounted and ran very well without the need of a power supply. In the past, FW800 PCI and PCIe host adapters did NOT supply bus power to connected devices.
3. Your Mac Pro can still sleep. If you are running Leopard, the Tango Expres 800 will still allow the Mac Pro to go into Sleep mode. In the past, FireWire 800 PCI cards prevented the Mac towers from going into Sleep mode. It is suspiciously OS related since we still can't get the Mac Pro to Sleep when running Tiger with the Tango Express 800 is installed.
ROOM FOR IMPROVEMENT
1. The write speed is still below that of the built-in FireWire 800 port.
2. How about a four lane or eight lane FireWire 800 PCIe card with two or four data channels?