Iomega MiniMax 2TB Firewire/USB drive
I am posting my experience with the 2TB MiniMax, as there seems to be some confusion on how it handles the two different data connections.
I have an Iomega MiniMax 500GB drive and I use both the Firewire 400 and the USB hub with no problem. There is a minor issue you must accept, however. To use the Firewire as the active data connection, you need to power up the drive with the USB disconnected and after the drive appears on the desktop, hot-plug the USB connection. Then as long as you don't power-cycle the drive, both connections function properly. You can Eject, remount (Disk Utility) soft-boot or cold boot the Mac and the configuration will not change.
Because I recently needed to increase my storage capacity I thought that the Iomega MiniMax 2TB would be ideal, replacing the 500GB one. After seeing these posts, reviewing the 2TB's literature and getting a non-answer from Iomega about the inability to use both the Firewire 800 and the USB 2.0 simultaneously, I was almost deterred. But--engineers, at least good ones, don't usually fix what ain't broke. I decided to try a 2TB unit and if it did not function as I expected it would, I'd just return same.
The results are:
Iomega needs to seriously revise its literature. It works the same as the 500GB unit.
1. Connect the Firewire 800 to the Mac.
2. Connect any peripherals which are going to use the USB hub to the MiniMax.
3. Do not connect the MiniMax USB to the Mac.
4. Boot the Mac (if not already up)
5. Power up the drive.
6. After the drive is recognized and mounted, hot-plug the USB between the MiniMax and the Mac.
Again, as long as you do not power-cycle the drive, you can happily use both the FireWire and the USB at the same time.
Other items of note:
Data throughput.
1. I copied a large (22GB) file to both the 2TB MiniMax and a 500GB WD USB drive connected to the MiniMax hub. I simultaneously performed a Duplicate on both files and timed the operation. The duplication on the MiniMax took 19 minutes and the duplication on the WD took 45 minutes.
2. I disconnected the MiniMax USB/Mac connection and performed another Duplicate operation. The duplication took 17 minutes. This suggests that the simultaneous use of the Firewire 800 and USB2.0 slows but does not materially affect the Firewire 800 data transfer rate.
Firewire pass-through.
1. I connected the MiniMax 500GB to the MiniMax 2TB drive using a Firewire 800-400 cable. The 500GB drive mounted as a Firewire drive and functioned properly.
The drive runs noticeably cooler than the 500GB unit (whose fan may not be working). It is is very quiet except when spinning up after sleeping. It sleeps when the Mac is put to sleep or when the Mac's Energy Saver sleep mode is active.
As long as you are willing to leave the drive powered up, I see no reason not to use it as a Firewire 800 drive with a USB2.0 hub. The sleep mode does reduce the power consumption and drive wear and tear.