Study Hall

Firewire Device Hierarchy: Does It Really Matter?

Which comes first, the audio interface or the drive?

FireWire: it just sounds fast, doesn’t it?

At the very least, it certainly sounds faster than USB. Perhaps that was Apple’s intention when they sat down with Sony, Texas Instruments, and many others to create an amazingly accessible data transfer specification that conjured up the image of reliability ease of use within the minds of users.

However, if FireWire has one flaw, it’s that it’s too easy to use. What do I mean? Let’s compare the connectors for USB and FireWire.

While USB has an A and a B side, FireWire simply has a side. Sure, FireWire has two different specifications with two distinctly different connectors, however, each has only one connector style.

Back to the point…

If FireWire has one flaw, it’s that it’s too easy to use, because there’s often some confusion as to the hierarchical order that devices get connected, as any device can seemingly be plugged into another.

In reading audio forums and message boards over the past two weeks, I have found nearly two-dozen posts asking which comes first, the audio interface or the drive.

Why? More often than not, engineers are concerned about possible audio drop outs and decreased drive performance, which aren’t completely unreasonable concerns.

Why is this an issue? Can’t devices be plugged in however I want?

Well, it depends. Some device manufacturers like MOTU and Apogee make no mention of a device hierarchy preference.

Others, such as RME, have seen notes in their forum that when using on Mac’s containing the LSI/Agere FireWire chip-set their audio devices only work when a FireWire drive is placed between the audio interface and the computer.

Others still, such as industry leader Avid/Digidesign, note the following. Personally, the fact that this is spelled out so plainly just makes me feel it’s a necessity.

From the 003 Getting Started Manual
Connect FireWire hard drives directly to a FireWire port on your computer.

image

“The FireWire ports on 003 and 003 Rack do not pass audio data when they are powered off. If you daisy-chain FireWire devices from your computer, it is best to connect FireWire hard drives directly to your computer and not to 003 or 003 Rack. This will prevent hard drive errors and data loss in case 003 or 003 Rack is powered off.

“If your computer has only one FireWire port, connect the FireWire hard drive directly to your computer and then connect 003 or 003 Rack to an available FireWire port on the drive.” (via Avid/Digidesign, pdf)

image
(via Apple, Wikimedia Commons, and OWC)

OK, so this is just for Pro Tools users and the paranoid?

No, not really… Personally, I think it’s good to adopt a set methodology of doing something even as mundane as hooking up a hard drive and stick to it, which is why I practice this habit.

Study Hall Top Stories